#+TITLE: S-151 Master Clock
* Specs

- Target Size: 8HP
- 24 [[https://en.wikipedia.org/wiki/Pulses_per_quarter_note][pulses per quarter note (ppqn)]] as per [[https://doepfer.de/faq/gen_faq.htm#Sync][SYNC SPEC]]
- Output signal from 0 -> +5V

** Core Features
  - programmable clock mult/div
  - tap tempo
  - bpm select
  - start stop
  - CV Inputs:
    - Clock
    - start/stop
  - CV Ooutputs
    - 4x programable clock out
** Advanced (desired) Features:
  - storage for presets
  - pulse width control
  - random tempo

* Hardware

** Main Component List
| Name               | Part Number             | Quantity | Function        | Notes                                 |
|--------------------+-------------------------+----------+-----------------+---------------------------------------|
| esp32              | ESP32_SE-DevKitC-1-N8R8 |        1 | MCU             |                                       |
| OP Amp             | TL074                   |        2 | CV I/O Buffers  | 1 for clock out. 1 for inputs         |
| LED Rotary Encoder | 12CE2H25B12C24          |        1 | Control Knob    | Blue/Green 12 ppr with NO SPST switch |
| LED                | generic                 |        4 | Clock Out Blink |                                       |
| 3.5mm TS Jack      | PJ398SM                 |        7 | CV IN/Out       | TS with switch                        |
| Pushbutton Switch  | undecided               |        1 | Tap Tempo       | NO SPST                               |
| Pushbutton Switch  | undecided               |        1 | Start/Stop      | NO SPST                               |
| Display            | undecided               |        1 | Display         |                                       |