Kit Assembly Instructions
Contents
1. Value Quantity Refdes 2 2 UF 1 C14 4 7 uF 1 C36 100 uF 1 C37 O 3 Transistors There are three 2N3904 transistors All three of the transistors are the same value so they have no refdes on the PCB just a distinctive outline Note that the outline for U5 is similar to that of a transistor but it is clearly labeled U5 on the PCB Make sure that the flat side of the transistor lines up with the flat side of the outline on the PCB The transistors will not sit flush against the PCB Do not force them down any further than they will go with a little pressure Transistors are more heat sensitive than most of the parts in this kit so take care not to let the soldering iron linger too long If you are unsure then solder one lead at a time and let the part fully cool off before soldering the next lead O ok Voltage Reference The voltage reference chip refdes U5 has the same basic shape as a transistor There are several ways to tell them apart First and foremost U5 is marked with the part number TLE2426 Second U5 is loose and the three transistors are taped to a piece of cardboard And finally U5 s leads are straight and close together while the transistor leads are bent and further apart When you put them side by side the differences become immediately apparent When in doubt read the marking on the part Make sure that the flat side of U5 lines up with the flat side of the outline on the PCB The leads on U5 a2. eere JI Am me EMEN a B ref 9 F NE NE ELA NE LE NE A a 10 OD ID Detail showing foot nut and overlay assembly Jw
3. DELPTRONICS LDB 1 Kit Instructions Page 5 of 8 Bottom Side Components The pushbuttons LEDs and potentiometer are mounted on the bottom side of the PCB the side without writing and soldered on the top side There are no part outlines on the bottom but it is very easy to see where these parts go They are all arranged around the edges of the PCB When you go to solder the bottom side parts you will see the leads sticking up through the part outline on the top side Also refer to the photo of the completed kit for reference The included control panel overlay only fits if the pushbuttons LEDs and potentiometer are mounted on the bottom If you choose to mount these parts on the top you are free to do so and the LDB 1 will still work fine To tell the LDB 1 that you have mounted the controls top side follow this one time procedure Fully build and test the kit Turn the power off Hold down the BD button Power on the unit Wait for the mode LED to light up O B Pushbuttons O O There are 12 pushbuttons They snap into place and stay put while being soldered Make sure they are seated flush against the PCB before soldering them Note that they are rectangular not square so if the pins are not lining up rotate it 90 degrees LEDs 4 There are 12 LEDs They are polarized so the direction that they are inserted into the PCB is important Make sure that the flat side of the LED lines up with the flat side of the
4. bit Then do the other side If the pins do not line up well with the socket repeat the straightening procedure Value Quantity Refdes TLO72 2 U1 U3 TLO74 1 U2 PIC12F508 1 U4 PIC18F26K22 1 U6 6N138N 1 U7 Inspection At this stage pause to inspect your work Compare your PCB to the photo Make sure that You didn t forget a part The chips are oriented correctly All of your solder joints are good There are no solder bridges blobs of solder covering two leads pins The leads are clipped off short right above the solder The bottom side parts are seated flush against the PCB Test 1 Insert a new 9V battery in the battery clip and turn on the LDB 1 The first time you turn it on there will be one to two second pause then the mode LED should come on If it does not come on then something is wrong Turn off the LDB 1 remove the battery and reinspect your work Otherwise go to the next step 2 Insert a mono 1 8 3 5mm plug into the Audio output jack and plug the other end of the cable into your amplifier or mixer 3 The LDB 1 starts in the Play Drums mode Press the buttons along the bottom of the LDB 1 to play individual drum sounds If you do not hear sounds or if a particular drum does not sound then something is wrong Turn off and unplug the LDB 1 and reinspect your work 4 Ifyou have gotten this far then you are good to go Feet amp Control Panel Overlay The overlay covers most of your solderi
5. shape on the PCB You can also be sure that it is oriented correctly because the negative lead is the shorter one and it goes in the hole indicated by the square pad OF eS dus cs Make sure the LEDs are seated flush against the PCB before soldering them If they are tilted or are at different heights then the overlay will not go into place correctly The usual method of soldering leaded components is to insert the part into the PCB and bend the leads to keep it in place when you turn the PCB over to solder Do not use that method or the LEDs will not be flush Potentiometer 000 The potentiometer can only be inserted one way It snaps in place and will stay there while you solder it Be careful to press down evenly so you do not bend the pins Make sure it is all the way in and seated flush against the PCB before soldering it DELPTRONICS LDB 1 Kit Instructions Page 6 of 8 Chips There are six chips Carefully insert each chip into its appropriate socket making sure not to bend any of the pins Note the direction of the chips before inserting them The notch on the chip must line up with the notch on the socket Refer to the photo of the completed kit for reference The chip pins come from the factory a little bit solayed out not pointing straight down You may need to bend them inward a little before you insert them Hold the body of the chip and rest all of the pins on one side against the table top and gently press down just a little
6. DELPTRONICS LDB 1 Kit Instructions Page 1 of 8 Important Information Congratulations and thank you for your purchase of the LDB 1 Little Drummer Boy Analog Drum Machine Kit Before you start please read the enclosed Electronic Kit Soldering Tutorial It contains important and useful information even for experienced kit builders If this is your first electronic kit you sure picked a big one It is not difficult to assemble but there are a lot of parts Take your time and be careful to put the right part in the right place It is not easy to de solder parts if you make a mistake With some parts it is important that the right lead goes in the right hole in the PCB printed circuit board For example electrolytic capacitors are polarized they have a positive lead and a negative lead Ceramic capacitors are not polarized so it does not matter which of the two leads goes in which of the two holes In these instructions the symbol highlights parts that must be inserted with a particular orientation The PCB is not marked with part values but rather with reference designators refdes For example R1 refers to resistor number one and C1 refers to capacitor number one Once the part value is identified it is easy to find the refdes on the PCB The parts in the kit are in two bags One bag contains discreet components like resistors and capacitors and the other bag contains electromechanical parts like jacks and switches The discreet compo
7. black orange 2 R14 R16 1M brown black black yellow 9 R5 R6 R12 R18 R21 R24 R25 R28 R47 2M2 red red black yellow 1 R83 4M7 yellow violet black yellow 3 R19 R37 R42 Ceramic Capacitors OOo Ceramic capacitors are very small tan or blue blobs Their value is marked on them with a three digit code The marking is rather small so you may have to use a magnifying glass to read them We recommend that you start with the 0 01 uF capacitors because that is the most common value Once they have been soldered onto the PCB it will be much easier to find the other refdes values Value Marking Quantity Refdes 68 pF 680 1 C22 470 pF 471 3 C12 C19 C23 0 001 uF 102 1 C8 0 0033 uF 332 4 C9 C10 C16 C17 0 0068uF 682 2 C28 C29 0 022 uF 223 2 C32 C33 0 033 uF 333 4 C26 C27 C30 C31 0 047 uF 473 2 C11 C18 0 068 uF 683 2 C34 C35 0 1 uF 104 11 C1 C2 C3 C4 C5 C6 C7 C15 C21 C25 C38 0 33 uF 334 1 C24 0 47 uF 474 1 C13 1 uF 105 1 C20 DELPTRONICS LDB 1 Kit Instructions Page 3 of 8 Electrolytic Capacitors There are three electrolytic capacitors Each one is a different value which is clearly printed on the capacitor Electrolytic capacitors are polarized so which lead goes in which hole is important The negative lead on the capacitor is the shorter one and it is marked with a gray stripe on its body The positive lead is longer The positive hole on the PCB has a square pad and is marked with a plus sign
8. nents are soldered first Before you start separate the parts by type When you are ready to solder parts of a particular type then separate them by value In general the order that the parts are soldered onto the PCB is shortest to tallest In the instructions below each part type is followed by the PCB outline for that part Refer to the enclosed photograph of the completed kit for assistance with part identification Top Side Parts The first group of parts are mounted on the top side of the PCB the side with writing on it and soldered on the bottom side Only the pushbuttons LEDs and potentiometer are mounted on the bottom side O000 U1 Chip Sockets gooo There are four 8 pin sockets and three 14 pin sockets Sockets are marked with a small U shaped notch that must line up with the outline on the PCB Once the socket is soldered in place the PCB outline will not be visible so it is important that the sockets are oriented correctly in order to ensure that the chips are inserted correctly Note that two of the 14 pin sockets go right next to each other to accommodate the 28 pin PIC18F26K22 chip Diodes D I Jo There are 20 diodes All of the diodes are the same value so they have no refdes on the PCB just a distinctive outline The diodes are red and black glass When inserted into the PCB the black side of the diode must line up with the stripe on the part outline on the PCB The diode leads need to be bent close t
9. ng so it is best to test the LDB 1 before putting it on Turn the PCB bottom up so that the buttons and LEDs are facing up Place the overlay over the entire board so that the LEDs buttons and potentiometer come through the holes Insert the threads of a foot through one of the holes in a corner of the PCB and thread the nut onto the foot It is easier to hold the nut and turn the foot Repeat for the other three feet Congratulations You have successfully built an LDB 1 Little Drummer Boy Analog Drum Machine Download the User Manual here http delptronics com documents LDB 1 UserManual pdf DELPTRONICS LDB 1 Kit Instructions Page 7 of 8 Top Component Side of Circuit Board Show before bottom side components have been soldered P je 5 m MF i SE BD E x i P n st LG 1 L HT DELPTRONICS LDB 1 Kit Instructions Page 8 of 8 Bottom Controls Side of Circuit Board 4r a Fi Fs 6 0 D A E e c hl x OF eS ey 2 Pe Ye 4v PR Fe Sh amp BH FO FH o LITE Y d Yr ANN OESTE Fin ds Ps 4s do Fe GAGAS es Ile vow I NEP NE T De Te e Arq bas e CIRO OAE ET ROME e A A e AE aon eR ee amp D lge 4 e DI TM TTO e er ye Pere yy wwe evevtsvtatascsevsostg nein CAR id a 7969 gt m eee KASS SES SES ee es uU e L4 s e gt xe ee amp 8 FPP eevee FF Oo ccc VE ORO ORBRRASOE CAO Me Vt LG Lo b Lu S A aE OP HORECHELE HOY
10. o the body of the diode Hold the diode body and press down on each lead right at the body to make a U shape DELPTRONICS LDB 1 Kit Instructions Page 2 of 8 Resistors OL JO The value of a resistor is indicated by colored stripes on its body In all cases the fifth stripe is brown indicating 196 tolerance so that stripe has been omitted from the chart below The resistor leads need to be bent close to the body of the resistor Hold the resistor body and press down on each lead right at the body to make a U shape We recommend that you start with the 1K resistors because that is the most common value Once they have been soldered onto the PCB it will be much easier to find the other refdes values Value Marking colored stripes Quantity Refdes 100R brown black black black 4 R54 R55 R56 R57 220R red red black black 1 R58 470R yellow violet black black 1 R59 560R green blue black black 1 R10 1K brown black black brown 12 R20 R27 R29 R32 R34 R38 R40 R43 R45 R50 R51 R60 2K2 red red black brown 1 R48 3K3 orange orange black brown 1 R49 4K7 yellow violet black brown 1 R80 10K brown black black red 5 R7 HR11 R35 R39 R44 15K brown green black red 1 R17 22K red red black red 4 H8 R22 R52 R53 33K orange orange black red 1 R23 47K yellow violet black red 5 R13 R15 R36 R41 R46 82K gray red black red 1 R9 100K brown black black orange 8 R1 R2 R3 R4 R26 R31 R61 R62 470K yellow violet
11. re closer together than the holes in the PCB Gently spread the leads out and press down on the part It will not sit flush against the PCB Do not force it down any further than it will go with a little gentle pressure The voltage reference chip is more heat sensitive than most of the parts in this kit so take care not to let the soldering iron linger too long If you are unsure then solder one lead at a time and let the part fully cool off before soldering the next lead Programming Header OOOOD This part is optional and is used only for reprogramming the microcontroller brain of the LDB 1 If you install it make sure it is seated flush against the PCB and points straight up DELPTRONICS LDB 1 Kit Instructions Page 4 of 8 Power Switch The power switch can only be inserted one way The switch actuator faces away from the PCB Make sure it is seated flush against the PCB before soldering it The switch will not stay in place by itself so you may want to tape it in place while you solder it Another tip is to solder only one of the pins then check to make sure it is flush If it is not flush it is simple to reheat the one solder joint while pressing the switch into place Once one pin is secure the switch will stay in place while you solder the other pins Power Jack The type M power jack can only be inserted one way The opening of the jack faces away from the PCB It will stay in place fairly well once inserted however care m
12. ust still be taken to ensure that it is seated flush against the PCB 1 8 inch Jacks The four 1 8 jacks can only be inserted one way The openings of the jacks face away from the PCB Make sure they are seated flush against the PCB before soldering it They snap into place and will stay put once inserted MIDI DINs ync MIDI DINsync Jack The MIDI jack can only be inserted one way The opening of the jack faces away from the PCB Make sure it is seated flush against the PCB before soldering it This jack will not stay in place by itself so you may want to tape it in place while you solder it Another tip is to solder only one of the pins then check to make sure it is flush If it is not flush it is simple to reheat the one solder joint while pressing the jack into place Once one pin is secure the jack will stay in place while you solder the other pins Battery Holder The battery holder wires are first threaded down through the hole next to the battery pads arched over then soldered in place on top of the board This keeps the battery wires from getting accidentally pulled out of the PCB The black wire goes in the hole with the square pad and the red wire goes in the hole with the round pad After you have soldered the leads gently pull the wires back through the hole so that they lie flat against the bottom of the PCB That way they won t interfere with the overlay Refer to the photo of the completed kit for reference
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