Enclosure not stated · 3 knobs
BomtempoVerified
Based on the Bomtempo
From the post
Just stumbled across this on FSB. It's a tap tempo + modulation add on for PT2399 delays designed by Electric Canary. It is digital so you'll either need to buy a pre-programed chipset or burn the code onto the chips yourself. Lots of off board wiring with this, but it's probably worth if you have a favorite PT2399 delay you want to take to the next level. Check out their site for more info, schematic and the code.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 15 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 2 | ||||
| ×2 | 100K | 100k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| Capacitors 2 | ||||
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| Transistors 1 | ||||
| ×1 | BS170 | BS170 | MOSFET, pins S G D; part number from the wiring diagram; read from the layout by eye | |
| ICs 3 | ||||
| ×1 | ATTINY84 | ATTINY84 | microcontroller, needs firmware; read from the layout by eye | |
| ×1 | MCP41100 | MCP41100 | digital pot; read from the layout by eye | |
| ×1 | 78L05 | 78L05 | regulator, pins I G O; part number from the wiring diagram; read from the layout by eye | |
| Potentiometers 3 | ||||
| Depth | A10K | A10k | Potentiometer | read from the layout by eye |
| Time | B10K | B10k | Potentiometer | read from the layout by eye |
| Speed | C10K | C10k | Potentiometer | read from the layout by eye |
| Switches 4 | ||||
| Division | SPDT | SPDT | on/off/on toggle; read from the layout by eye | |
| Wave | SPDT | SPDT | on/off/on toggle; read from the layout by eye | |
| Double | SPDT | SPDT | on/on toggle; read from the layout by eye | |
| Tap | SPST | SPST | momentary footswitch; read from the layout by eye | |