Control board
About the Control board
Control board is an open source PCB design by m0xpd, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 108 × 88 mm, with 97 components from 18 distinct parts.
Other key parts include the LM555N, TL084P, 74HC595N and THONKICONN_JACK. By type, the board carries 31 resistors, 24 LEDs, 21 ICs, 6 capacitors, 3 jumpers and 3 switches.
It belongs with the audio designs in this gallery.
From the project
A Random Looping Sequencer for Eurorack
This folder contains details of STRACHEY's control board, which you see below (component side).
The bottom side of the control board hosts all the jacks, pots, tactile switches, and 24 LEDs, which mate with the Front Panel and form the user interface.
You can download the main board's schematic as a .sch file into your PCB program (KiCad etc) or download a PDF version.
Main components on the Control board
Control board bill of materials (BOM)
97 components, 18 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM555N | DIL08 | IC1 |
| 1 | TL084P | DIL14 | IC2 |
| 3 | 74HC595N | DIL16 | IC3, IC4, IC5 |
| 16 | THONKICONN_JACK | WQP-PJ301M-12_JACK | U$1, U$2, U$3, U$4, U$5, U$6, U$7, U$8 +8 |
| 2 | ~ | 1X18 | JP1, JP3 |
| 1 | ~ | 1X08 | JP2 |
| 3 | MOMENTARY-SWITCH-SPST-PTH-6.0MM | TACTILE_SWITCH_PTH_6.0MM | S1, S2, S3 |
| 1 | A100k | 9MM_SNAP-IN_POT | VR1 |
| 8 | B100k | 9MM_SNAP-IN_POT | VR2, VR3, VR4, VR5, VR6, VR7, VR8, VR9 |
| 24 | ~ | LED3MM | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +16 |
| 5 | 0.1 | C050-025X075 | C1, C2, C4, C5, C6 |
| 1 | 4u7 | E2,5-5 | C3 |
| 9 | ~ | 0204_7 | R1, R8, R18, R19, R20, R24, R25, R26 +1 |
| 7 | 1k | 0204_7 | R2, R3, R7, R10, R17, R22, R29 |
| 4 | 47k | 0204_7 | R4, R9, R12, R13 |
| 6 | 100k | 0204_7 | R5, R6, R11, R15, R21, R28 |
| 3 | 22k | 0204_7 | R14, R16, R23 |
| 2 | ~ | SIL9 | RN1, RN2 |
Control board design files
The KiCad project lives in the m0xpd/STRACHEY repository on GitHub; these links point at the commit this page was built from.
Control board: common questions
How big is the Control board?
The Control board measures 108 × 88 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Control board?
97 components, from 18 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Control board design files?
From the m0xpd/STRACHEY repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Control board design in my own project?
Yes, under the terms of its CC-BY-SA-4.0 license, which m0xpd chose for the repository.
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