2 layers108 × 88 mm
2 layers108 × 88 mm
STRACHEY
m0xpd/STRACHEY25A Random Looping Sequencer for Eurorack
- Size
- 108 × 88 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 126
- Nets
- 118
- Pads
- 434
- Tracks, vias
- 1,394, 177
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 29 Nov 2023
- Updated
- 25 Mar 2024
Overview
STRACHEY is an open-source printed circuit board by m0xpd, from the m0xpd/STRACHEY repository on GitHub, published under the CC-BY-SA-4.0 licence. It is a 2-layer board of 108 × 88 mm with 126 parts on 118 nets, routed with 1,394 tracks and 177 vias.
It is built around the TL084-P14, BAT42 and BC546. Its parts include 69 resistors, 18 diodes, 16 capacitors, 8 ICs and 4 transistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
TL084-P14
SOP-14-15V~-5V、5V~15V -20℃~+85℃ 1.4mA 13V/us 200pA 2mV 3MHz 4 50pA 60mA 95dB Short-Circuit Protection SOP-14 FET Input Amplifiers ROHSShikuesFET Input Amplifiers
BAT42
DO-35-65℃~+125℃ 200mA 30V 4A 500nA@25V 650mV@50mA Independent DO-35 Schottky Diodes ROHSSTMicroelectronicsSchottky Diodes
BC546
TO-921 NPN 100mA 100nA 300MHz 500mW 65V 6V 800 90mV、250mV NPN TO-92 Bipolar (BJT) ROHSDDFBipolar (BJT)
README
Hardware/Panel/README.mdFront Panel
This folder describes STRACHEY's front panel.
I designed the panel in KiCad. I've been using KiCad for panel design for over a year so (unlike in electronic aspects of this project) I can't claim to be a new user - but I can confirm that KiCad is great for designing front panels.
There is a .pcb file and a .pro file which together make a KiCad project for the Panel (the schematic is, of course, trivial as the panel has no electrical connections).
These add up to a panel which JLCPCB made for my prototype system in aluminium in black with white silkscreen (as per the design). JLC did their usual excellent job (usual disclaimer), but this white on "black on an aluminium substrate" recipe is very expensive. If you want to save money, you should either change the design to black on white on an aluminium panel or change to an FR4 panel.
You can see the front and rear sides of the prototype panel in the image below:
Parts
126| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 10K | main board:0204_7 | R1, R2, R3, R13, R19, R20, R21, R22, R23, R24, R25, R26, R36, R38, R41, R42 +8 |
| 18 | R-EU_0204/7 | main board:0204_7 | R27, R28, R29, R30, R31, R32, R33, R34, R35, R37, R39, R40, R43, R44, R45, R46 +2 |
| 14 | BAT42 | main board:DO35-7 | D1, D2, D3, D4, D5, D6, D7, D8, D11, D12, D13, D14, D15, D16 |
| 13 | 0.1u | main board:C050-025X075 | C1, C2, C3, C4, C5, C6, C7, C8, C9, C11, C12, C14, C16 |
| 10 | 10k | main board:0204_7 | R4, R5, R7, R17, R18, R57, R58, R61, R62, R63 |
| 6 | 1M | main board:0204_7 | R14, R16, R53, R54, R55, R56 |
| 4 | 470 | main board:0204_7 | R9, R10, R11, R12 |
| 4 | BC546 | main board:TO92-EBC | Q1, Q2, Q3, Q4 |
| 4 | TL084P | main board:DIL14 | IC1, IC2, IC4, IC8 |
| 2 | 10 | main board:0204_7 | R52, R60 |
| 2 | 100k | main board:0204_7 | R8, R64 |
| 2 | 1N4148DO35-7 | main board:DO35-7 | D9, D17 |
| 2 | 1N5817 | main board:DO35-7 | D10, D18 |
| 2 | 1k | main board:B64Y | TR1, TR2 |
| 2 | 22u | main board:E2,5-5 | C10, C13 |
| 2 | 4081 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | IC3, IC6 |
| 2 | 470R | main board:0204_7 | R15, R65 |
| 2 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad_TopBottom | H1, H2 |
| 2 | PINHD-1X18 | main board:1X18 | JP1, JP5 |
| 1 | 1k | main board:0204_7 | R6 |
| 1 | 1u | main board:E2,5-5 | C15 |
| 1 | 2510- | main board:PAK100_2500-10 | X1 |
| 1 | 78LXX | main board:78LXX | IC7 |
| 1 | ARDUINO_NANO | main board:ARDUINO_NANO | U$1 |
| 1 | MCP9422 | main board:DIL14 | IC5 |
| 1 | PINHD-1X3 | main board:1X03 | JP3 |
| 1 | PINHD-1X8 | main board:1X08 | JP2 |
| 1 | PINHD-2X8 | main board:2X08 | JP4 |
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Questions
How big is the STRACHEY PCB?
It measures 108 × 88 mm and has 2 copper layers, 1.6 mm thick.
What parts does the STRACHEY use?
126 parts, built around the TL084-P14, BAT42 and BC546. 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 STRACHEY KiCad files?
From the m0xpd/STRACHEY repository on GitHub, at the commit this page was made from: the board is Hardware/Main/main board.kicad_pcb and its schematic Hardware/Control/control board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STRACHEY design in my own project?
Its repository publishes it under the CC-BY-SA-4.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).