DIY SP-12/Drumulator Instructions

 

Kit_14

Now you can build the SP-12/Drumulator yourself.

Get one of the kits and follow the instructions here:

http://webshop.dspsynth.eu

The drum chip used in the SP-12 is the dsp-D8 available here.

It is also open-sourced and the code can be founds here.

Kit

BOM for the build

D1-D25 1N4148
R1-R7 22Kohm
R8-R9 1Kohm
R10 100ohm
C1-C2 10uF
C3 100nF/0.1uF
T1 BC-337
IC1 dsp-D8
IC2 78L05
CN1-CN16 Thonkiconn jacks PJ301M-12
POT1-POT6 Alpha 9mm 10Kohm Lin

 

Schematics

 

SP12drumulatorSchematic

PCB Layout

PCB_Layout

Building steps

1. Get the PCB out

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2. Solder the D1 to D25 diodes. Mind the polarity.

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3. Solder the R1 to R7 resistors

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4. Solder the R8, R9, R10, C1 to C3 capacitors. Mind the polarity of the black capacitors.

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5. Solder IC2 and T1 transistor.

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6. Solder the IDC power connector.

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7. Flip the board over and solder the 16 Thonkiconn jacks

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Kit_8

8. Solder the 6 Alpha potentiometers

Kit_9

9. Finaly solder the IC1 drum chip

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10. Mount the panel

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11. Mount the Davies knobs

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12. Mount it into your rack and drum away.

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