2 layers181 × 113 mm
Quad VCA Mixer
MitchReyno/Electronics-Projects
A collection of various electronics projects I've worked on over the years
132 partsGPL-3.0
2 layers
A collection of various electronics projects I've worked on over the years
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 48
- Nets
- 118
- Pads
- 219
- Tracks, vias
- 27, 0
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 Feb 2026
- Updated
- 25 Jun 2026
Overview
Clocky is an open-source printed circuit board by MitchReyno, from the MitchReyno/Electronics-Projects repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board with 48 parts on 118 nets, routed with 27 tracks and 0 vias.
It is built around the 74HC165D and 1N4740A. Its parts include 23 transistors, 11 diodes, 11 connectors and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
Eurorack/Eurorack_PSU/README.mdEurorack PSU
A mains-powered linear power supply for a Eurorack modular synthesizer case.
What it does
Converts 240 VAC mains to the four standard Eurorack DC rails:
| Rail | Regulator |
|---|---|
| +12 V | LM7812 |
| −12 V | LM7912 |
| +5 V | LM7805 |
| −5 V | LM7905 |
Key components
| Component | Role |
|---|---|
| Mains transformer (240 VAC, 20:1) | Mains isolation and step-down |
| GBU6A | Full-bridge rectifier |
| LM7812 / LM7912 | ±12 V linear regulators |
| LM7805 / LM7905 | ±5 V linear regulators |
| 10 000 µF bulk caps | Reservoir filtering |
| 1N4007 diodes | Rectifier protection |
Files
KiCad 8 project files are in the root directory (.kicad_sch, .kicad_pcb, .kicad_pro).
Revision: 1 (2026-02-28)
Parts
48| Qty | Value | Footprint | References |
|---|---|---|---|
| 23 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1, Q2, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q19, Q20, Q21, Q22, Q23 +7 |
| 10 | LED_RAGB | LED_THT:LED_D5.0mm-4_RGB_Wide_Pins | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
| 1 | 1N4740A | Diode_THT:D_DO-41_SOD81_P7.62mm_Horizontal | D11 |
| 1 | 4017 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U1 |
| 1 | 74HC165 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U2 |
| 1 | A | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J4 |
| 1 | Arduino_Nano_v3.x | Module:Arduino_Nano | A1 |
| 1 | B | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J5 |
| 1 | C | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J6 |
| 1 | D | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J7 |
| 1 | E | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J8 |
| 1 | F | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J9 |
| 1 | G | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J10 |
| 1 | H | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J11 |
| 1 | IDC_02x08 | Connector_IDC:IDC-Header_2x08_P2.54mm_Vertical | J1 |
| 1 | RST | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J3 |
| 1 | TRG | Connector_Audio:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical_CircularHoles | J2 |
Questions
What parts does the Clocky use?
48 parts, built around the 74HC165D and 1N4740A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Clocky KiCad files?
From the MitchReyno/Electronics-Projects repository on GitHub, at the commit this page was made from: the board is Eurorack/Clocky/Clocky.kicad_pcb and its schematic Eurorack/Bong0/Bong0_Cat.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Clocky design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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