Manual - Control Voltage
Contents
1. IN 2 3 j4 5 6 7 18 10 11 12 13 14 15 16 18 19 20 21 22 23 24 26 27 28 29 30 31 32 1 XIXIXIX IXIXIXIX XIXIX XIXI XIXIX XIXIXIXIXIX IXIX XIXIXIXIXIXIXIX 2 X X X X X X X X X X X X X X X X 3 X X X X X X X X X X 4 X X X X X X X X 5 X X X X X X 6 X X X X X 7 X X X X 8 X X X X 9 X X X 10 X X X 11 X X 32 X Clock outputs down beat counting IN 2 ey 25 S IS pw 100 11 42 13 44 1415 16 18 19 20 21 22 23 24 26 27 28 29 30 31 32 1 X X X X X X X X X X X xX X xX xX XTX xX XIX XIX xX XTX xX XI xX x x x x 2 x X X xX X X X X xX X xX X X xX X xX 3 X X xX xX xX xX X X X x Xx 4 X X X xX xX xX x X 5 X xX X xX x X xX 6 X xX xX X X xX 7 X xX X X X 8 X X xX x CV Rotation By applying a CV signal to the CV Rotate jack the clock divisions will rotate throughout the output jacks see table 2 For example if you apply just over 1 0V Jack 1 R Red will go from Divide by 1 to Divide by 2 and Jack 2 R Orange will become Divide by 3 up to Jack 8 R White which will wrap rotate around to become Divide by 1 Applying more CV to the Rotate Jack will continue the rotation next Jack 1 becomes Divide by 3 then Divide by 4 then Divide by 5 until it s Di2. ts ow 4 gt 8 a 5s ow 7 C io ot a i ta ts we 1 oe a ae 5 ow 8 me io is 4 is ie aa op wp sh ow 7 ww to lo mi ts te tt oe a a zh ow ct flo fo fa ar tot Pots te ts fate is te to n ots fe is Table 4 Spread off Div by amounts with max div by amount set to 32 Jumper 3 out Jumper 4 in e ca a 8 R D F D a Table 5 Spread off Div by amounts at each jack with max div by amount set to 64 no Jumper 3 or 4 Jacks PR 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 R i y4 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 SR si 35 36 37 38 39 40 4 42 43 44 45 46 47 48 49 50 GRE 3c 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 SRE 37 38 39 40 s 42 43 44 45 46 47 48 49 50 51 52 6 R 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 7 R 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 8 R 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 con t Ra o ll 52 53 54 55 56 57 58 59 60 61 62 63 6
3. are not changed Also note that the CV Reset is independent of the Auto reset For example Jack 7 R could be patched into the CV Reset with jumpers 3 4 and 5 in This would cause a reset every 7 clocks plus an additional reset every 16 clocks There are too many combinations of Auto reset and Max divide amounts to show all combinations Example Auto reset of 16 Jumper 6 in with Max Divide by of 8 Jumpers 3 amp 4 in in pe g la le le Iz 8 H o 11 112 413 44 J15 16 REA 18 J19 20 21 122 23 124 BA 26 27 28 29 30 31 132 3 x x x x x x x x x x 5 X X X X X X 7 X X X X Operation Apply a clock signal to the Clock Input jack Rising edges of 5V or greater will cause the internal dividing counters to be incremented Each jack has its own counter that counts from 1 to its divide by amount and then resets back at 1 In up beat counting each jack outputs a trigger pulse when its counter reaches the divide by amount assigned to that jack In down beat counting each jack fires when its counter is 1 Typically the outputs will patch to trigger able or gate able modules drum modules ADSR envelope transient generators step sequencer clock input etc but the RCD can also operate in the audio frequency range thus crudely stepping pitch downward Clock outputs up beat counting
4. 4 2R 5o 51 52 53 54 55 56 57 58 59 60 61 62 63 64 1 SR 5 52 53 54 55 56 57 58 59 60 61 62 63 64 1 2 WR 52 53 54 55 56 57 58 59 60 61 62 63 64 1 2 3 SEROUS 53 54 55 56 57 58 59 60 61 62 63 64 1 2 3 4 54 55 56 57 58 59 60 61 62 63 64 1 2 3 4 5 7 R 55 56 57 58 59 60 61 62 63 64 1 2 3 4 5 6 8 R 56 57 58 59 60 61 62 63 64 1 2 3 4 5 6 7 PCB or Code v1 0 2 TRIGGER MODE UP BEAT COUNTING NO JUMPERS IN 7 amp 8 1 2 3 4 S 6 7 8 9 10 11 12 13 14 15 16 cockweur LI UL UU UU UU UU UU ut 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1S 16 avoy UU UU UU UU UU UUUUL 2 4 6 8 10 12 14 16 avey2_ LIJLILILILILILIL 3 6 9 12 15 avys ITLL TL 4 8 12 16 div by a JL TL TIL _ l 5 10 15 div by es ee TL TL 6 12 div by s eee eee 7 14 div by ee es ree 8 16 div by a JL fi GATE MODE DOWN BEAT COUNTING BOTH JUMPERS 7 amp 8 Indicates falling edge of clock input all others are rising edge 1 2 3 4 2 6 7 8 9 10 11 12 13 14 15 16 CLOCK INPUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 avoy UU U UU UU UU UU UU UU 1 2 3 4 2 6 7 8 9 10 11 12 13 14 15 16 aval LI LIL O LU LU LU L 1 21 4 5 7 sl 10 1TL 13 141 16 aveys LJ LJ LI LI LI 1 3 2 Le 9 11 13 15 aval LOS LI LUIS Le 1 31 6 sl 11 134 16 aves LO T LCS LOT 1
5. 4 ve 10 13 16 div by 6 Lo OCOT LT L 1 4 8 1r 15 avoy Lo T o To 1 5 9 13 aves LL LL 4ms Rotating Clock Divider How CV Rotate Works In this metaphorical illustration applying a voltage to the Rotate jack makes the outer circle of jacks rotate around the inner circle of divided clock signals For a technical chart of the exact voltages needed to cause exact rotations see the User Manual This page assumes all jumpers are in their factory positions i e only jumpers 3 and 4 are in 1V applied to CV Rotate Jacks shifted 1 unit clockwise 1 R div by 2 2 R div by 3 E 5 1V applied to CV Rotate 7 R div by 8 Jacks shifted 7 units clockwise 8 R div by 1 2V applied to CV Rotate 1 R div by 2 Jacks shifted 2 units clockwise 2 R div by 3 1 R div by 2 s 2 R div by 3 7 R div by 8 a 8 R div by 1 7 R div by 8 8 R div by 1
6. Rotate Reset 3 Q TQ e Ze Rotating Clock Divider Eurorack Module User Manual for firmware v1 1 4ms Pedals Features Divide by 1 to Divide by 64 on 8 output jacks CV Rotate jack to shift divide by amount on all jacks CV Reset to reset re sync all jacks Jumpers or optional break out panel o Select auto reset o Select Spread mode o Select maximum divide by amount 8 16 32 64 4 o Gate or Trigger outputs o Count up or Count down mode UART header o Reserved for expansion to future devices MIDI master clock controller o Arduino compatible ISP header o Connects to in circuit programmer such as AVR ISP MKII for reprogramming code Maximum input frequency 3kHz 4 H P Eurorack module 60mA power draw 12V or 15V Jacks e Clock Input 3 5V to 15V clock rising edge triggered CV Rotate OV to 5V input e CV Reset 3 5V to 15V trigger e Divided Clock Outputs 8 jacks Divide by 1 R e Divide by 2 R e Divide by 3 R e Divide by 4 R e Divide by 5 R e Divide by 6 R e Divide by 7 R e Divide by 8 R where R is the CV Rotation 0 to 63 OUT IN 7 Counting Up Down Eee E i Max Div Range JO g 5 Spread Off On T Up down LEE Si PCB v1 0 2 and later 1 0 4d shown PCB v1 0 1 old version Jumpers There are six jumpers on the back labeled 3 4 5 6 7 and 8 Each can be set with a jumper plug or an optional break out panel with switches Se
7. So all the jacks will fire after a Reset pulse and then count up to N and fire again when they start over at 1 This is called down beat counting because all the jacks fire on the down beat first clock pulse Gate Trigger Mode In Trigger mode the jacks output a pulse width equal to that of the input clock the pulse width is not multiplied or divided proportionally to the jack s divide by amount This is the default method for pcb v1 0 and v1 0 1 unless it has been upgraded to v1 0 2 or later firmware In Gate mode the width of the output pulses are 50 of the total wave For example the 6 jack will stay ON for 3 clock pulses and then turn OFF for 3 clock pulses For even numbered divisions 2 4 6 8 etc the transitions happen on the input clock s rising edge Point of interest In Gate mode with odd numbered divisions the jack will turn ON on a rising edge of the input clock and then will turn OFF on a falling edge For example the 5 jack ought to stay on for 2 5 clock pulses meaning it should go OFF somewhere between the rising edge of clock pulses 2 and 3 Right in between these is the falling edge of pulse number 2 so we can Safely call it 2 5 When in Gate mode jumper 8 the difference between Up counting and down counting is simply that the gates are inverted Spread mode Spread mode causes the output to spread evenly amongst the entire max division range See the Jumper 3 4 and 5 table on the previo
8. e the above photos to identify the location of jumpers on your PCB the PCB version is written in white letters near the 8 Jack Chances are your RCD is version 1 0 2 or later Jumpers 3 4 and 5 Max Divide by Range and Spread Mode Total Rotatable Divide by range Default Divide by amount on jacks with no voltage applied to CV Rotate jack tables 2 5 Applying CV to Rotate jack makes each output increase by 1 Spread off Spread on 1 2 3 4 5 6 7 8 1 2 3 4 6 8 12 16 9 10 11 12 13 14 15 16 2 4 6 8 10 12 14 16 17 18 19 20 21 22 23 24 4 8 12 16 20 24 28 32 MEG 6 32 with Divide by range of 33 34 35 36 37 38 39 40 8 16 24 32 40 48 56 64 Jumper 7 Jumper 8 Up Down beat counting Gate Trigger mode Up Gate T Down rigger Auto reset off Dee ere rene tee off Up beat counting off Trigger mode Up beat Down beat counting In Up beat counting each jack fires after N number of pulses are counted on the input jack where N is the divide by number So after a Reset pulse only the 1 jack will fire on the first clock pulse On the next clock pulse the 1 and the 2 jack will fire then on the next pulse the 1 and 3 jacks will fire etc This is the default method for pcb v1 0 and v1 0 1 unless it has been upgraded to v1 0 2 or later firmware In Down counting each jack fires when its count is 1
9. us page For instance if Max Div is set to 32 then in spread mode the jacks will output divisions evenly spaced from 1 to 32 pus whatever rotation is applied Since there are 8 jacks spread over 32 values each jacks will always be offset by 4 divisions from its neighbors See table 3b For example With no CV at the Rotate jack the jacks will output 14 18 112 16 20 24 28 32 Applying a small amount of CV to the Rotate jack will make each jack increment by 1 5 19 1 13 17 21 25 29 1 Applying more CV Rotation will shift them further Note how the difference between each jack is 4 6 10 14 18 22 26 30 2 A different thing happens when Max Divide by is set to 8 In this case the jacks will only output standard musical divisions of triplets and sixteenth notes 11 12 13 4 16 8 12 16 Adding a little bit of CV Rotation will shift the outputs to 12 13 14 16 8 12 16 1 Adding more Rotation will shift them more 13 14 16 8 12 16 1 2 In all cases the outputs will be limited to these musical divisions and no weird divisions such as 7 or 13 will ever appear See table 2b Auto Reset Jumper 6 selects the Auto reset point which causes the divide counters to reset after a certain number of clock pulses Note that divide by amounts which are evenly dividable by the reset amount are not affected e g with an auto reset of 16 divide by outputs of 2 4 8 16 etc
10. vide by 8 at the maximum input CV Some non linearities exist in the CV response especially in the upper extreme See diagram at end of this manual CV Reset Applying a CV of 5V or greater to the CV Reset jack will cause all the divide counters to reset on the next clock pulse So applying a reset pulse will not change the tempo since the RCD will wait for the next clock pulse to actually do anything Counting will begin back at 1 after a Reset A low slow output on the RCD can be patched into Reset or a second RCD running on the same master clock can be set to run very slow and reset the first RCD after an arbitrary number of beats Rotation Tables Table 2a Spread mode off max divide by amount set to 8 3 4 5 oR wW hM jN OIN D OR W hM WIN I gt SINI DIANIA BRLWINM OINI oI INID IA VINI gt N gt O N oa R W lM DINI O NIDIJAJA W hy 0 D Table 2b Spread mode on max divide by amount set to 8 olo AjI a a3 OJN Table 3a Spread off max divide by amount set to 16 Jacks memes e e e ee eee eee eee pom AEAEE EENE EEE 5 mmm is is 1 gt E ee a ee eee Table 3b Spread on max divide by amount set to 16 Jacks A TT TT mm tl ck fl to fl i ajajajaj gt a m e z ce lo to fl fe a ta ts te 1 gt 3 a fm to to ts ta
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