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Integrated Circuits
CD4013 dual D-type flip-flop
U26
CD4093 quad NAND gate
U21
4558 dual op-amp
U10
AS3310 envelope generator
U24, U25
LM13700 dual OTA
U8, U14, U15
LM4040-10 10V reference
U2
LT1013 dual op-amp
U3, U11, U19
OPA2134 dual audio op-amp
U12
TL072CN dual op-amp
U22, U6, U16, U17, U13, U20
TL072ACP dual op-amp
U4, U18
78L12 100mA +12V regulator
U1, U7
79L05 100mA -5V regulator
U23
79L12 100mA -12V regulator
U5, U9
Miscellaneous
Ferrite bead
L1, L2, L3, L4
MTA100 3 way
BUS
MTA100 2 way
OUT
MTA100 6 way
PWR1, PWR2
MTA156 4 way
PSU1, PSU2
2 x 8 way 0.1” boxed header *
HDR1, HDR2, HDR3
10-way SIL 0.1” socket **
CN1, CN2, CN3, CN4, CN5, CN6, CN7, CN8
10-way SIL 0.1” header
OSC1, OSC2, OSC3
* If you have bought polarised headers for HDR1, HDR2 and HDR3, then they must be aligned
correctly. Pin 1 lines up with the square pad on the PCB. Pin 1 is normally depicted by a small
triangle on the body of the header.
** CN1 to CN8 mounted on the underside of the board, facing down, and soldered from the top.
IC sockets are optional but recommended for DIY projects. There are thirteen 8-pin, two 14-pin and
five 16-pin DIL sockets used on the main board.
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