DIY electronic musical instruments and soldering kits

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  • Spare OKAY PCBs

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These are unpopulated, unassembled Printed Circuit Boards for the OKAY / OKAY 2. For schematic and assembly information, see the guide page.

PCB Description
bus 0.1.1 Switches and distributes power from the 9v battery to the other boards and LED
555_4040 0.1.1 Oscillator and frequency divider, provides 12 octave output
SPST_VR 0.2.2 15 Trimming potentiometers and pushbuttons set the 555's frequency
SPST_VR 0.2.2 14 An additional set of SPST_VR board for the OKAY 2's extra keys
386 0.1.1 Standard headphone amplifier circuit