MOTM-510 User Manual
Contents
1. gt OTS WLOW 81 86 118 08 97 XL LHO4 HO5GIU IIVOQO S299 ADOO IONHOH LL SISHHILLNAS S99TYMOT AHSNOW NOTLONOA LOON ALIN NOI LON ld 024 cca OCT LON ML Ac LIC LAO TINA sca WTO OOTWLN HILIUWNdd ATANASSY HOLIMS NO VID AST LANO AdOOOT AdOOOT M99 L PZA MCT MCT WOT Tea eto c STO QOO si 10 V0 D cL 1 0 LL 8 TT L 9 NTO WL O zm TTD WOT WOT LTO 9TD OT OT eeu V AST AGL QNOD AGL SYNTHESIS TECHNOLOGY 510 WAVEWARPER S REV A COPYRIGHT 2003 WWW SYNTHTECH COM VR1 WARNING C WAVEWARPER CAN CAUSE L2 A BLOWN SPEAKERS B IRRITATED SPOUSES C DEATH TO RODENTS AND INSECTS C C4 OPERATE UNDER EXTREME CAUTION JP1 4 19 M CN R5 R18 R ms fos LO 7 R6 R20 R3 R17 C9 C10 VRS R23 C2 R14 R29 TES ooh Q UE Pd 5 E ES R13 3 2 R10 5 15 5 R2. synthesis MOTM 510 The WaveWarper Assembly Instructions amp Owner s Manual Synthesis Technology 6625 Quail Ridge Dr Fort Worth TX 76180 817 498 3782 www synthtech com June 9 2006 MOTM 510 PARTS LIST Please carefully check that all parts are in your kit If you have a suspected shortage please call or email If you get free extra stuff keep it for next time Capacitor bag containing the following 17 parts 4ea 10mfd 50V Electrolytic 4 10mfd non polar Electrolytic 2ea 1000pf marked 1N yellow box cap 0 1mfd marked 104 ceramic axial Resistor bag containing the following 33 parts 11 10K brown black orange 68K green gray orange 20K red black orange 2ea 12K brown red orange 2ea 1K brown black red 2ea 10 ohm brown black black lea 22 ohm red red black lea 30K orange black orange lea 39K orange white orange NOTE R22 is not used amp Semi bag containing the following 5 parts 4 TLO72ACP dual opamp lea AD538 really expensive analog lea 1N4148 diode Misc 1 bag containing the following 6 parts 2ea Axial ferrite beads plain gray things lea MTA 156 4 pin power connector lea 100 7 pin connector lea custom rotary switch assembly lea 18 pin screw machine IC socket Knobs containing TYCO PKES9OB1 4 lea TYCO 2 1437624 0 SYNTHESIS TECHNOLOGY MOTM 510 ASSEMBLY 7 11
3. 2 very different types of solder used in the kit Most of the soldering uses Organic Flux solder This is strictly for use on the board and is NOT to be used on the front panel wiring In order for solder to stick to the copper a chemical called flux 1s embedded in the solder The flux leaves a residue on the pc board that should be cleaned with warm water DO NOT USE SOAP OR OTHER CLEANSERS Most of the parts in the kits are waterproof and can be SYNTHESIS TECHNOLOGY PAGE 4 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM washed in the sink The flux is OSHA approved for flushing down the drain so don t worry about that A soft brush is used to gently scrub the board We recommend a fingernail brush which is about 1 x 2 and can be found for about 1 The other type of solder is called No Clean Flux because as the name implies it does not require washing This solder is used for wiring the pots switches jacks etc This solder is harder to use on the pc board because even when melted it is not very fluid about the consistency of toothpaste We will use it VERY SPARINGLY on the pc board OK let s get started on the board PART 1 SOLDERING THE RESISTORS Since there are more resistors than anything else we will start here If you do not know the resistor color code refer to the parts list Resistors are not polarity sensitive but the board will be easier to debug and look nicer if yo
4. is probably too hot for yours too Be careful Also note that the FULL OUT can output up to 400 KHz at high energy levels you re bound to break something SYNTHESIS TECHNOLOGY PAGE 18 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM Now try turning down the WARP knob At zero the timbre is quite a bit fuzzier than at 10 Try the same with the Y WARP knob same deal but the Y fuzziness has a different character It would be cool to automatically modulate the fuzziness in and out me thinks No problem that s what the OFFSET jacks are for In this patch I use an LFO to sync the S amp H speed with the OFFSETs on the 510 Here is a diagram of the patch VCO saR S amp H VCO SIN TRI SIN OFFSET X AUDIO X 4 SIN 910 gt OFFSET Y AUDIO Y XIN 10 X WARP 4 YIN 10 YWARP 6 ZIN 0 Z WARP 0 POWER UNITY AUDIO OUT FACTOR 0 Y Figure 1 Patch Chart for DEMO 3 Now we re hearing something pretty interesting with just two sine waves Play with the X IN Y IN and X and Y WARP knobs and see what it does to the timbre When you re done set them back as in the patch diagram that way the next demo will sound close to what you ll hear on your system Now crank the Z WARP knob to 10 Crazy But what s going on SYNTHESIS TECHNOLOGY PAGE 19 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH C
5. to make an analog multiplier function then what you can possibly do 18 a somehow take the logarithm of the inputs not obvious b add them together EASY c somehow perform the anti log and BINGO still not obvious The solution the circuitry inside the AD538 does this for us Gf you really want to understand exactly how circuits can perform log antilog functions get a copy of the Non Linear Handbook from Analog Devices 1 800 262 5643 select option 3 In a manner of speaking the AD538 IC calculates in real time both log and anti log functions of input signals The data sheet for the AD588 also has more theory and is contained as a PDF file on the CD ROM and also on the Analog Devices website If all the AD538 did was to act as a multiplier that would be fine but not that exciting there are many other analog multiplier ICs out there that don t cost 55 We already use multipliers in our synths these are called Ring Modulators and So what s the big deal with the AD538 and the WaveWarper Well 2 things First the AD538 can also divide Hmmm haven seen that before in a synth module AD538 does this by another trick using logarithms In X Y In X In Y Meaning that if we subtract the logarithms instead of adding them we divide Awesome dude and people think math is boring In analog circuits this 1s trivial simple op amp inverting summer All of a sudden the AD538 is lookin
6. wrap to secure the coax cable flush to the board The tie wrap goes down into the left hole and up through the right hole Secure and trim off any excess See the photograph below for proper mounting this 1s generic photo not specifically using the 510 pc board E i EE jl Locate the 2 red black twisted wires These solder 11160 J4 and J6 One end of the wires has more insulation stripped than the other We call this the long end The short end is what solders into the pc board Solder the red wire in the top 1 hole and the black wire 1 the bottom 722 hole Locate the orange white twisted wire It solders into 2 Solder the white wire into the top hole 1 and the orange wire into the bottom hole 2 Locate the red black white twisted wire It solders into VR5 The red wire goes into the top hole 223 the black wire goes into the center hole 2 and the white wire goes into the bottom 1 hole Locate the 2 orange gray white twisted wires These solder into VR6 VR7 Solder the orange wire into the top 8 hole the gray wire into the center 2 hole and the white wire into the bottom 1 hole Locate the really pretty but painfully expensive U4 the 0538 After admiring the shiny gold top and handsome ceramic body reflect for a moment that if you mess this next step up it s going to cost you 55 Pin 1 of this IC has a small white triangle by it The po
7. 0 to 5V scale so that 1V 100F 2V 200F etc how would you do it Answer AD6538 The details are left to the user but this part was widely used for this application The other application was to warp the voltage in radar CRT terminals so that specific shapes square triangles etc drawn FAA radar screens which are NOT flat CRTs SYNTHESIS TECHNOLOGY PAGE 16 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM but are bowls are correctly seen Hint to linearize a function like you run it through the inverse function AUDIO OUT FULL OUT PLEASE READ There are 2 outputs on the MOTM 510 labeled AUDIO OUT and FULL OUT What s the difference and how do you know which one to use The difference 1s the AUDIO OUT has an AC coupled 16Khz 2 pole lowpass filter The FULL OUT has no filter and is DC coupled 502212 The FULL OUT should ONLY be used for DC control voltages or LFO outputs WARNING IF YOU USE THE FULL OUT AND CONNECT IT TO AMPLIFIERS MIXERS DIGITAL RECORDERS AUDIO CARDS WHATEVER YOU CAN EASILY DESTROY BLOW UP EXPLODE FR Y FUBAR INSERT BAD THING HERE TO YOUR EQUIPMENT YOU HAVE BEEN WARNED The AD538 can easily generate large signals with large DC offsets Also the wide bandwidth of the AD538 can generate harmonics up to 400Khz Yep I said 400KHz So it s pretty simple use AUDIO OUT unless you are warping LFOs loads of fun Then you NEED to use the FULL OUT SYNTHES
8. 04 WWW SYNTHTECH COM C4 C8 C16 C17 C1 C3 C5 C13 C12 C15 C2 C6 C7 9 11 C14 R5 R7 R11 R12 R14 R18 R19 R21 R26 R27 R3 R6 R10 R13 R17 R20 R24 R1 R2 R8 R9 R15 R16 R30 R31 R25 R32 R33 R34 R23 R28 R29 01 U2 U3 U5 04 D1 L1 L2 JP1 JP2 plugs into JP2 for U4 for pots for rotary switch PAGE 2 Jacks containing Sea Switchcraft 112A Pots containing the following 1 100 ohm Spectrol 148 71101 VERA 3ea 100K Spectrol 149 71104 VR1 3 100K Bourns conductive plastic VR5 7 Front panel Mounting bracket Wire bag containing the following 12 wires bea RG 174 coax 4 inches 2ea red black 22ga 81 2ea orange gray white 22ga 4 1n lea orange white 22ga 5in lea red black white 22ga 7in 1 Power Cable 20 Hardware bag containing 4 8 32 x 3 8 black screws for mounting module to rack 4 6 32 x 1 2 zinc screws for attaching pc board to bracket 4ea 1 4 inch aluminum spacers 6ea 6 KEPS nuts small tie wraps Organic Solder No clean Solder J PC Board MOTM 510 SYNTHESIS TECHNOLOGY PAGE 3 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM GENERAL INFORMATION Thank you for purchasing the MOTM 510 WaveWarper If you have any issues concerning the building or use of the kit please contact us at 817 498 3782 or by email synth1 airmail net This kit should take the averag
9. 10 2 Try using CVs instead of audio signals You can warp LFO triangle wave to all sorts of bizarre shapes Use the FULL OUT if you want to uinclude all of the DC offsets as well 3 Try using audio rate waveforms in the OFFSET jacks 4 Do something that I didn t think of yet make an MP3 of it and post it to the newsgroup Section 2 Mangling Other Sources One way of thinking about the 510 is that it 1s a distortion device Don t believe me Try it How d I do that With this patch Guitar Preamp AUDIO X 910 AUDIO Y 4 OFFSET AUDIO 2 0 XWARP 6 5 YIN 10 YWARP 5 ZIN O ZWARP 7 5 AUDIO UT POWER POWER FACTOR 10 v MOTM 440 AUDIO OUT Y Analog Delay AUDIO OUT Y Figure 2 Patch Diagram for DEMO 7 6 SYNTHESIS TECHNOLOGY PAGE 21 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM The 440 allowed me to dial in the tone I wanted and the analog delay gave it some space But the distortion and size of the sound all came from the MOTM 510 Note that you have to fiddle a little bit with the WARP knobs to get just the right quality of distortion Your mileage may indeed vary You can really get some interesting tones by varying the resonance and frequency parameters of the filter Using another filter will give another quality to the tone too Here is another demo using the same patch inF ig 2 but adding a little FM to t
10. 22 BE 811 17 O En R26 J2 c NN c13 JP2 J1 1 J3 155 llo R4 2 2 2 t J7 J8 VR4 J6 i
11. 5VDC 23 ma nominal 15VDC 23 ma nominal 20 x 50 3 12 x 8 12 88 2mm x 221 5mm 4 375 inches 111mm PAGE 23 OTSIN 43Uueumn oqezrsg OTS WLON 81 86 118 08 97 XL HLHOM LNO IIVOQO S299 AOO IONHOH LL SISHHILLNAS HOS Z OTSW ANIT UL ZA AA XA SI AAASNVAL LVHL OS HHOLV IONHWON OL LO AdSAA HLIM 5 AAJ SHOWL IOA AHL ALON T MOZ i AST 8 Air Z LASAAO ZLO LL MOT wen NIT MOOT L LUA T ZLO LL WOT O 0 lt XA ES AOL WTO 62 SD 7 oranw AGT MOT M89 e stu LTA NI I MOOT AGT AST AGT ae Z 9 vo AGT 8 A LHS4dO 8287 NI I MOOT pu oe 5 L ZLO LL 2 sa MOT AGT A oranw MOT M89 e NIT MOOT AGT AST 1 WI O 5 A dHVM EM 5 iL AGT 8 X LASAAO 24 0714 NIT MOOT SAA T WOT 5 O T oc Te WI O LO TO oranv AST MOT M89 e va ca NIT MOOT X AST AST 3eeus roocz Z OISN
12. ANEL PREPARATION You will now attach components to the front panel It is HIGHLY recommended that you use a set of hollow shaft nut drivers NOT PLIERS to tighten the nuts This prevents scratching NOTE all references to part orientation is from the REAR of the panel g Locate the 8 Switchcraft jacks Notice that from the rear there is a beveled corner This corner is ALWAYS CONNECTED TO GROUND WITH A BRAIDED CONDUCTOR Each jack has a flat washer lockwasher and a hex nut Remove the nuts and washers from each jack Place aside Keep the lockwasher on the jacks Insert the 8 jacks lockwashers with the beveled corner in the upper right corner into the 8 holes Place the flat washer on the jack then the hex nut Hold the jack with one hand on the backside keeping it square Tighten the hex nut with a nut driver NOTE when tight not much of the exposed threads of the jack are exposed Remember those resistor lead scraps you have been saving They solder on the OFFSET X OFFSET Y and OFFSET Z jacks Solder the scrap in between the TOP and the BEVELED lugs Be sure to leave enough space on the beveled lug to attach the coax braid just solder the TOP lug for now Locate the 8 blue Bourns 100K pots These are for the X IN Y IN and Z IN panel holes The pots have a lockwasher that is behind the panel and a flat washer is on the front side of the panel Secure the pots to the panel with the 3 leads pointing down tow
13. IS TECHNOLOGY PAGE 17 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM TUTORIAL SECTION A Ring Modulator is a multiplier the output can be written as Out X where X and Y are the 2 input signals sometimes referred to as the modulator and the carrier X and or Y can be audio or DC signals The output is simply the voltage X times the voltage Y This produces the sum of X and Y X Y and the difference of X and Y X Y Instead of the 2 RM inputs the basic WaveWarper has 3 X Y and 7 These are audio inputs The transfer function is Out X 2 OK so let s plug in some numbers to the MOTM 510 transfer function If we assume Z and m are both one then we get OUT X 1 71 which simplifies to OUT X Y which the minimally astute reader will recognize as the transfer function for a classic ring modulator So if we are understanding things correctly the following patch should give us some traditional sounding RM VCO 1 SIN OUT gt 510 AUDIO Y Y IN 10 WARP 10 VCO 2 SIN OUT gt 510 AUDIO X X IN 10 X WARP 10 510 AUDIO OUT amplifier power switch UNITY Drive the VCO s however you like I use the MOTM 101 Sample amp Hold module detuning the VCO s shows off the nice RM effect of the patch I take the 510 AUDIO OUT to the MOTM 109 IN and the OUT of the 190 to my mixing desk This allows me to attenuate the output going to the desk The signal in this patch is TOO HOT for my mixer s inputs and
14. OM Pretty simple really Refer back to equation 1 by altering 7 WARP we are changing the value of Z 1n the equation 1 This of course alters Out and munges the wave form OK one last demo before moving on to other aspects This one uses the same patch diagram as for DEMO 3 except we ll add another sine wave from a third oscillator to AUDIO Z and tweeze the knobs a bit I call this piece Concerto for Farty Armpit Noises which is probably not PC Oh well VCO LFO SQR S amp H SIN SIN AUDIO X TRI 910 AUDIOY 4 SIN gt OFFSET Y AUDIO Z 0 X WARP 3 0 YWARP 0 ZIN 10 ZWARP 5 POWER ROOT AUDIO OUT FACTOR 10 Figure 2 Patch Diagram for Demo 5 And finally here is an extended improvisation using the patch diagrammed in Figure 2 The only alteration was the addition of an LFO feeding the S amp H IN of the 101 to get a more regular pattern to play with All the timbre variations you hear are accomplished by turning knobs and changing the ROOT UNITY POWER switch This is an amazing amount of variation coming out of one module No filters were used and no envelopes SYNTHESIS TECHNOLOGY PAGE 20 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM Exercises for Section 1 1 Try patching other waveforms from the oscillators into the AUDIO ins of the 5
15. alling 18 later on Look at the IC socket notice one end has a notch the crossbar This indicates pointing up meaning Pin 1 is the UPPER LEFT CORNER on the socket If you look closely at the SYNTHESIS TECHNOLOGY PAGE 7 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM pc board Pin 1 is a SQUARE solder pad with the 1 printed above it The IC outline on the bard also has a notch pointing up which matches the notch in the IC socket So solder the IC socket into U4 with the notch UP The pins are small diameter so you will have to hold the socket flat against the pc board while soldering the first 2 or 3 pins DO NOT BEND ANY OF THE IC SOCKET PINS OVER ON THE PC BOARD Apply a small bit of solder to the via holes These are the small pads that allow traces to change sides of the pc board DO NOT SOLDER PADS FOR THE REMAINING COMPONENTS As an example if you look at VR2 you will see traces surrounded by copper with 2 via holes above VR2 and another via hole to the left of VR2 A hidden one hard to see is directly above the letter P in the 510 WAVEWARPER lettering near the top edge of the pc board PART 5 FINAL BOARD WASH amp INSPECTION g Verify all the parts are in the correct locations Make sure all of the ICs are pointing the same direction Inspect the solder joints Any solder shorts Too much solder Missing joints Wash the board under warm wa
16. ards the jacks 9 nut driver is preferred to tighten the panel nut Now comes a tricky part The rotary switch assembly goes into the ROOT UNITY POWER hole but it has to be tightened in a specific orientation If you look at the rear of the switch you will see tiny numbers under each lug In between the l and the 8 lugs you will see a black support latch This black piece that is in between the 7 and 8 lugs must be straight up at the 12 o clock position which on SYNTHESIS TECHNOLOGY PAGE 10 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM the other side of the panel is where the UNITY tick mark is Looking from the rear back of the switch there will be a red wire on the 7 lug and nothing on 8 The switch has plastic threads so be very careful when tightening the nut You have to grasp the switch from the rear making sure it does not rotate from the correct position You are now ready to attach the pc board to the bracket and then wire up to the panel PART 8 ATTACH PC BOARD TO BRACKET PANEL In the HARDWARE bag locate 4 6 32 x 3 8 screws 4 6 KEPS nuts and 4 spacers Locate the mounting bracket The pc board attaches to the bracket with the 4 screws threading from the top of the board through the spacers through the bracket and then out the bottom of the bracket If the bracket has a protective plastic covering remove it first The 6 KEPS nuts attach on the bottom of the bra
17. ators or slide rules So they figured out that if there could be some way of cheating using say pre printed tables so that if you wanted to multiply X times Y instead you could add 2 values based on X and Y and still get the right answer that would be KEWL So these tables were calculated and were called logarithms Here s an example 2 x 3 SYNTHESIS TECHNOLOGY PAGE 14 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM What you do is find the table let s not go into how we got the table the logarithms in this case these are called the natural logarithms and are abbreviated In x like In 2 You may have seen log x which are DIFFERENT logarithms and that s for another day So we find In 2 6931 and In 3 1 0986 Adding these together we get 1 7917 Errr now what Well we perform the inverse logarithm meaning we look in the table for the answer of 1 7917 and see what number has this for it s logarithm the choice of the term inverse 18 sometimes called anti log so that you don t get confused with the inverse of a number which is 1 divided by that number Scanning the table we see that there IS in fact an entry for this number 1 7917 and by some miracle that number is 6 So 2 x 3 6 The way inverse logarithm 18 written 1s like this ln Now I m sure by this point many of you are questioning my sanity why this is even relevant to the 510 The point is if you want
18. buses the AD538 we replace the fixed trim pot with a rotary switch and a front panel control so that you can tweak the exponent in real time So what was the original application s of the AD538 before we started abusing it with audio One widely used application was electric thermometers Many of you have heard the term thermocouple A thermocouple 18 a temperature probe there 18 one in your oven made by twisting 2 different metal wires together This makes a small very small battery whose voltage output is based on the temperature of the junction of the 2 metal wires Also you can take certain alloys of metal usually platinum that change resistance to temperature according to something called the Stainhart Hart equation I T 2 a b InR c InR 3 where a b and c are fudge factors based on the wire used R 1s the resistance and T 1s the temperature Note that this nasty equation can be solved with the AD6538 the In R part and the c In R part as well Why 1s THIS a big deal Because this chip was designed in the pre microprocessor pre ADC world and the temperature readout was a linear analog meter Since the meter has a linear scale we want a linear relationship between temperature what we are measuring and voltage driving the meter how we are displaying the temperature Think about it for a minute if I came to you and said I need a circuit that uses this equation to drive a meter over a
19. cket Attach the pc board to the bracket The flanges will point upwards when the pc board is sitting on the bracket Note that the bracket holes for the pc board are actually oblong This is to allow adjustment for the pc board to firmly press up against the back of the panel As a start set the 4 screws ALL THE WAY TO THE LEFT of the oblong holes Loosely tighten the 4 KEPS nuts on the bottom THIS IS A VERY IMPORTANT STEP SO PAY ATTENTION AND READ ALL OF IT BEFORE PROCEEDING Note that each of the 4 pots on the pc board have 2 hex nuts and a flat washer Remove the first hex nut and the washer Set aside What you will do now is adjust the remaining hex nuts so that when the bracket is all the way down on the panel s threaded studs all the pot hex nuts touch the rear of the panel Screw by hand each hex nut on the pots so that it 1s all the way on touching the face of the pot Now pick up the pc board bracket assembly and carefully slide 16 over the 2 threaded studs making sure the pots are aligned in the holes Use 2 6 KEPS nuts and tighten the bracket to the panel Loosen the 4 KEPS nuts on the bottom of the bracket Slide the pcb ALL THE WAY TO THE RIGHT AS FAR AS IT WILL GO so that the 4 pot nuts are all pressing against the panel By hand put hex nuts on the outside threads of VR1 and VR4 to keep the pc board in place Now tighten the 4 KEPS nuts on the bracket The pcb and bracket should be secure with no gaps vis
20. e builder between 3 and 4 hours The kit contains many different resistor values and special parts However please remember this is NOT a speed contest it is an accuracy contest There 18 no rule that you have to complete the entire kit in one day as long as you wash the flux off Successful kit building relies on having the proper tools Here is a list of what you will need to build your MOTM 510 Soldering iron 50W max power Needle nose or chain nose pliers Diagonal cutters Allen key set for securing the knobs 1 16 or 1 6mm Magnifying glass to read the capacitor codes and to inspect solder joints Lead bending tool optional but makes the job go much faster optional oscilloscope to check the output 1 Philips screwdriver Fingernail brush for washing off the organic flux Old towel for blotting dry pc board For more information of tools used and suggestions see the MOTM FAQ and Catalog pages at http www synthtech com There are no calibrations trimmer to set for this module HOW TO FOLLOW THE DIRECTIONS Please read the entire instruction before proceeding There may be valuable information at the end of the instruction Each instruction has a check box CJ next to it After you complete the instruction check the box This way you can keep track of where you are in the process VERIFY THE PARTS LIST Verify that all of the parts in the kit as shown the parts list A WORD ON SOLDERING There are
21. e front panel pots fully counter clockwise Locate the KNOBS There 7 regular knobs and 1 special pointer knob The pointer knob is for the rotary switch This knob goes on first and it is somewhat tricky to align correctly The best way is to loosen the 2 hex screws 1 have no idea why there are 2 of them manually rotate the switch clock wise until it stops at the POWER position and attach the knob It may take several tries to get the 2 set screws to balance the torque on the knob so that the white line aligns with the 8 tick marks Well it s tough for me at least 4 The other 7 knobs go on the 7 pots Place the knob on the pot shaft align the white line to the 0 tick mark and tighten the hex screw The silver part of the knob has a protective clear plastic overlay that can be removed if desired Gently rub with your fingernail across it and it will peel off SYNTHESIS TECHNOLOGY PAGE 13 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM Use the 2 remaining tywraps to bundle the wires to the Bourns pots and most of the wires to the jacks Trim off the excess kkkkkkxkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk CONGRATULATIONS YOU HAVE FINISHED BUILDING THE MOTM 510 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk All that s left to do is test 1t But before we do please read the following Theory of Operation A hands on tut
22. ection stripe so be SURE they all in the pc board the same way PART 4 MISC and IC STUFF Almost done with the parts on the pc board This will finish up the soldering with the organic flux J Locate the MISC 1 bag and the IC bag Locate the ferrite beads 2 They are axial parts gray colored with no markings These are non polar and are soldered into L1 and L2 by Locate the MTA 156 4 pin power connector Solder into JP1 Note that the connector has a locking tab on one side The silkscreen symbol for JP1 has a line on one side indicating this is the side where the locking tab goes Locate the MTA 100 7 pin rotary switch connector Solder into JP2 Note that the connector has a locking tab on one side Note the silkscreen symbol for JP2 has a line on one side indicating this 18 the side where the locking tab goes Locate the 1N4148 diode Solder into D1 with the black stripe on the diode facing up matching the while stripe on the silkscreen Locate the TLO72ACP op amps 4 Solder into U1 U2 U3 and 05 Note that all ICs are pointing up towards the top edge of the pc board The IC will have a notch or indentation the top by Pin 1 Locate the 18 pin IC socket It solders into the space for U4 See the interesting BE CAREFUL lettering on the pc board It s there for a reason you need to be careful in both soldering in the IC socket AND installing U4 inst
23. g quite interesting But there is one more surprise and it s a biggie using logarithms it s also easy to calculate roots and powers of numbers too This 1s calculated by using the well know relationship In X y In X For example to calculate 4 SYNTHESIS TECHNOLOGY PAGE 15 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM In 4 1 88629 In 4 3 4 15888 In 4 15888 64 lt lt lt taa daa Of course step 2 above the multiply 1s done inside the AD538 by adding logarithms as before Personally I think this is pretty COOL STUFF being able to multiply divide AND raise to powers using only adding circuits And even cooler we are able to this is real time using voltages as the numbers in our little analog computer What s the difference between a root and a power In this context they are the same but the implication is that a root is lt 1 the other use of the math term root means the number that makes an equation equal to zero So a square root which is usually written like this Vx Can also be written as x The downside of the AD538 well a downside for use MOTM users 1s that the exponential factor is NOT a control voltage Rather it 1s designed to be an external trim pot This is because the normal usage of an AD538 is to generate a specific equation that is application dependent In these circuits the exponent 16 a constant that is trimmed However the MOTM 510 a
24. he 440 Finally you can destroy just about any innocent waveform I really love sampled Pan Flutes don t you Here s the final sample As you can hear nothing escapes the 510 s power to mangle TROUBLESHOOTING If your MOTM 510 does not work please verify ALL of the following before contacting us The following reference directions assume that you are looking at the pc board with the panel to the right and the power connector to the left of the ICs are pointing the same way and all notches down The braided wire the coax goes to the beveled side of the jacks Check all of the pots and switch wiring The parts are in the right places you didn t swap the 1 with a 100K 1 No solder shorts missing joints Again when the rotary switch 18 turned or even slightly turned the module with output spikes pops or crackling This is normal operation SYNTHESIS TECHNOLOGY PAGE 22 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM Input signal level any input Output level Output distortion Output SNR CONTROLS IN1 IN2 IN3 IN4 IN5 GENERAL Power Supply Size Depth behind panel SYNTHESIS TECHNOLOGY MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM SPECIFICATIONS MOTM 510 WaveWarper 6V to 6V 20V peak peak before clipping Quite a bit actually Hard to tell Attenuator for the sum of IN1 IN2 Attenuator for the sum of IN3 INA Attenuator for IN5 1
25. ible between the panel and the pot nuts You may need to loosen the nuts on the pots so that they are touching the back of the panel Again make sure each pot s nut is touching the back of the panel no gaps There may be a gap from the edge of the pc board to the panel SYNTHESIS TECHNOLOGY PAGE 11 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM PART 9 FINISH WIRING THE PANEL Please read the following instructions carefully In order to neatly attach the many wires to the front panel components the wires are soldered in a specific order g 44 04044 1 Now you will solder to the 8 jacks Each jack has 8 lugs from the rear we will refer to them as LEFT TOP and BEVELED The TOP lug is for the switched contact this is a NC normally closed contact that 18 opened when a plug is inserted The resistor lead scraps placed between the TOP and the BEVELED lugs purposely shorts unused inputs to ground This lowers the noise and the DC offset voltage Solder the coax in J8 to the AUDIO OUT jack The braid goes to the BEVELED lug The inner conductor goes to the LEFT lug This is true of ALL coax wires Solder the coax in J7 to FULL OUT Solder the coax in J5 to AUDIO 7 Solder the coax in J3 to AUDIO Y Solder the coax in J1 to AUDIO X This is somewhat of a stretch but it will reach Solder red black wire in J6 to OFFSET Z The red wire goes to the LEFT lug and the black wire goes to the BEVELED lug Solder red black
26. int of the triangle will be pointing to a thin strip of metal A free Dr Pepper to the first person who guesses what this little strip is for The flat side of the little triangle is PIN 1 If you somehow forgot to install the IC socket do so now using no clean solder Soldering U4 into the pc board is in technical terms a bad idea SYNTHESIS TECHNOLOGY PAGE 9 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM If you discover with panic that you soldered the socket in upside down then DON T try to unsolder it The IC will still go in fine But no Dr Pepper for you Now using the utmost caution carefully insert U4 into the socket with Pin 1 across from C16 where oddly enough provided this rather large 1 symbol If you see that Pin 1 is across from the JP lettering this in technical terms is called bass ackwards or upside down or even about to cost you 55 You can remove U4 witha small flat bladed screwdriver prying up under the IC body Pry the IC a little ata time alternating end to end else there 15 a great chance you will bend the pins GENTLY BUT FIRMLY press U4 down in the socket The IC body will NOT touch the top of the socket This is because the pins are flared at the top where the pins extend out from the ceramic body You may even hear a small click as the IC seats in the socket YOU ARE NOW FINISHED WITH THE PC BOARD WORK BREAK TIME PART 7 FRONT P
27. ith the top of the solder joint with your diagonal cutters NOTE later in the assembly you will need 3 scraps of resistor lead Be sure to save some ANOTHER NOTE The AD538 IC is VERY EXPENSIVE to replace 55 There is a socket provided but you MUST BE CAREFUL when inserting the IC into the socket later in the assembly Be SURE you solder the socket in the correct orientation YOU HAVE BEEN WARNED SYNTHESIS TECHNOLOGY PAGE 5 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM Locate the 10K 5 resistors 11pcs Solder the resistors into R4 R5 and R7 by U1 R11 R12 and R14 by U2 R18 R19 and R21 by 03 and R26 and R27 left of U5 Locate the 68K resistors 7 and solder into R3 and R6 by U1 R10 and R13 by U2 R17 and R20 by U3 and R24 below C13 Locate the 20K resistors 6 and solder into R1 and R2 by U1 R8 and R9 by U2 and R15 and R16 by U3 Locate the 12K resistors 2 and solder into R30 and R31 left of C13 Locate the resistors 2 and solder into R25 right of J7 and R32 left of VRA Locate the 10 ohm resistors 2 and solder into R33 and R34 right of VR7 Locate the 22 ohm resistor and solder into R23 left of VR3 Locate the 30K resistor and solder into R28 left of C16 Locate the 39K resistor and solder into R29 below VR7 NOTE position R22 to the right of JP2 is NOT USED and should be left OPEN PART 2 BOARD WASH 1 oO g Verify all the resis
28. orial follows with several audio demos you can listen to at www synthtech com demo warper IMPORTANT NOTE The ROOT UNITY POWER switch is physically disconnecting active signals while the module is under power Therefore the module may output pops crackles and thumps when switching position Also it is possible to apply enough pressure on the knob without turning it to another position but will cause this noisy output the contacts of the switch bounce and this causes noise The switch assembly is NOT BAD nor is the module bad THEORY OF OPERATION TUTORIAL The MOTM 510 is a small pre programmed analog computer It is set to perform 1 basic mathematical calculation whose end result is a warping or distortion of the input s The analog computer is the Analog Devices AD538 IC chip the gold plated one which has internally many op amps and laser trimmed resistors set up for the specific calculation And what is that calculation you ask start with the AD538 is a combination of multipliers and log amps What s a log amp Good question it s a specially designed amplifier whose output is not linear but goes as the logarithm of the input Wait you groan as sweat begins to form on your brow what s a logarithm OK here s the quick overview A while back extremely smart people decided that it was easier to add numbers than multiply them especially since there were no calcul
29. ter Scrub gently Allow to dry for at least 2 hours THIS IS A GOOD STOPPING PLACE TO REST OR PUT THE KIT AWAY UNTIL LATER You are now finished with the Organic flux solder All soldering past this point is using the No Clean solder You do not have to wash the board anymore PART 6 FINISHING THE PCB You will now solder in the remaining parts on the pcb in preparation for wiring to the front panel USE THE NO CLEAN SOLDER BE CAREFUL g Locate the Spectrol pots These have black bodies the Bourns pots have blue bodies Look carefully at the lettering 3 pots will be marked 149 71104 and 1 pot will be marked 148 71101 The 148 pot goes into VR4 The 3 149 pots go into VR1 VR2 and VR3 Insert the leads so that the pot sita all the way down resting on the pc board with the shafts facing outward Solder and trim the leads Locate the 5 pieces of RG 174 black coax cable Again note that one end has longer wires stripped than the other The short ends will go in the pc board locations J1 J3 J5 47 and J8 Look at the pc board Notice that 1 the coax positions there 18 a large hole pad lower pad and a smaller pad top hole The braided wire is soldered into the larger hole The smaller inner conductor goes the top hole BE SURE THE SHORTER BRAIDED END GOES INTO THE PC BOARD SYNTHESIS TECHNOLOGY PAGE 8 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM Solder each coax cable into the holes Attach a tie
30. tors are in the correct position Verify all the resistors are flat on the board Correct if needed Check solder joints Wash the board warm water gently scrubbing both sides DO NOT USE ANY SOAP Just water Blot dry with old towel and let it sit for at least 15 minutes Take a little break You are about 1 8rd of the way finished PART 3 CAPACITORS g Locate the CAPACITOR bag Note that the ceramic axial caps are bent on 0 300 centers If you are using the Mouser red plastic bending guide you will see there is no slot for the 0 300 spacing However we can use a clever trick You use the round hole at the small end Lay the body of the cap across the hole and bend the leads over the sides as before A perfect 0 300 bend SYNTHESIS TECHNOLOGY PAGE 6 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM Locate the 2 yellow box caps 1000pf or 1nf and solder into C12 and C15 Locate the 0 1mfd axial ceramic caps 7 and solder into C2 C6 C9 C10 C11 and C14 Locate the 10ufd NON POLAR electrolytics 4 Note that the caps are labeled NP and are missing a marking stripe Insert these into C1 C5 and C13 Locate the 10ufd electrolytics 4 which are orange Note that there is a stripe on the NEGATIVE terminal The pc board has on the POSITIVE terminal Carefully stick the capacitors into C4 C8 C16 and C17 with the stripe away from the pad on the board All 4 capacitors are facing the same dir
31. u point the first color band in the same direction for all the parts The color code is also in the README FIRST document that every customer receives with his or her first order You will start by soldering in ALL of the resistors Find the RESISTOR bag Find MOTM 510 blank board There is a copy larger than actual size of the silkscreen which shows where the parts go at the end of this document It will be useful if you locate the part on the print first put the part in the board then check off the silkscreen All parts are inserted from the side of the board with the white silkscreen the top side We will stuff the resistors by value to make things easier The resistors are inserted on a 0 4 inch spacing The important thing 18 to be sure that the part 1s sitting all the way down on the board Push the leads in the holes push the part on the board and then bend the leads on the bottom outwards to a 45 degree angle roughly This is called cinching the leads and keeps the part from falling out From the bottom of the board solder using the organic flux applying heat to the pad for about a half second first then applying just enough solder to make a small puddle that looks like a tiny pyramid Enough solder should flow in the hole such that on the top component side a small amount is on the top pad as well The rule of soldering don t use too much you can always add more Cut the leads flush w
32. wire in J4 to the OFFSET Y jack Solder the orange white wire in J2 to the OFFSET X jack The white wire goes on the LEFT lug and the orange wire goes on the BEVELED lug The red black white wires VR5 solder to the Bourns pot X IN The red wire solders to the LEFT pot lug 8 the black wire solders to the center lug 2 and the white wire solders to the right lug 1 The orange gray white wires VR6 solder to the Y IN Bourns pot The orange wire solders to the left lug the gray wire solders to the center lug and the white wire solder to the right lug The orange gray white wires solder to the 7 IN Bourns pot The orange wire solders to the left lug the gray wire solders to the center lug and the white wire solder to the right lug SYNTHESIS TECHNOLOGY PAGE 12 MOTM 510 ASSEMBLY 7 11 04 WWW SYNTHTECH COM The rotary switch white 7 pin connector goes on 2 If you look at the wires the connector the 2 outside wires are red and black Now look at the pc board the male JP2 connector should have the locking tab next to the empty R22 position Place the rotary switch female connector carefully on JP2 so that the RED WIRE IS ON THE TOP NEXT TO VR3 AND THE BLACK WIRE IS ON THE BOTTOM BY THE JP2 LETTERING This will cause the wires to go over the top of U4 away from the front panel BE SURE THAT THE CONNECTOR IS NOT OFFSET ON JP2 THAT THE END PINS ARE BOTH INSERTED Rotate all of th
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