Symmetric power supply
About the Symmetric power supply PCB
Symmetric power supply is an open source STM32 PCB design by Synthron, published on GitHub. It is a 4-layer board measuring 160 × 100 mm, with 197 components from 55 distinct parts.
Its main chip is the STM32F103C8Tx, from the STM32 family. Other key parts include the LM317_TO-220, LM2902, LM337_TO220, SN65HVD232 and AP1117-33. By type, the board carries 86 resistors, 65 capacitors, 20 diodes, 10 ICs, 5 transistors and 5 connectors.
It belongs with the power & battery, audio and displays & leds designs in this gallery.
From the project
Modular Electronics Workstation
The ModLab is designed to be housed in a 19" Rack with 3U. It is the improved version of the (failed) Arduino Workstation I built a long time ago.
But now It will be bigger, better and way too complicated.
- [X] Rewrite documentation in english - [ ] Write better introduction - [ ] explain what exactly the ModLab is - [X] update changes for TFT - [X] Explain TFT Protocol - [ ] Attach Schematics - [X] Cleanup Repo
Main components on the Symmetric power supply
Symmetric power supply bill of materials (BOM)
197 components, 55 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM317_TO-220 | TO-220-3_Vertical | U201 |
| 5 | LM2902 | TSSOP-14_4.4x5mm_P0.65mm | U202, U203, U302, U303, U601 |
| 1 | LM337_TO220 | TO-220-3_Vertical | U301 |
| 1 | SN65HVD232 | SOIC-8_3.9x4.9mm_P1.27mm | U401 |
| 1 | STM32F103C8Tx | LQFP-48_7x7mm_P0.5mm | U402 |
| 1 | AP1117-33 | SOT-223-3_TabPin2 | U501 |
| 3 | BSS138 | SOT-23 | Q101, Q401, Q402 |
| 1 | TIP107 | TO-220-3_Vertical | Q201 |
| 1 | TIP102 | TO-220-3_Vertical | Q301 |
| 1 | 8MHz | Crystal_SMD_5032-4Pin_5.0x3.2mm | Y401 |
| 1 | DIN41612_02x32_AC | VG64_Euro | J101 |
| 1 | V+ | PinHeader_1x02_P2.54mm_Vertical | J102 |
| 1 | V- | PinHeader_1x02_P2.54mm_Vertical | J103 |
| 1 | SWD | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J401 |
| 1 | Address | PinHeader_2x02_P2.54mm_Vertical | J402 |
| 2 | Heatsink | SK574-50 | HS201, HS301 |
| 1 | G6K-2 | Relay_DPDT_Omron_G6K-2F | K101 |
| 1 | LL4148 | D_MiniMELF | D101 |
| 6 | D_Schottky | D_SOD-123 | D201, D202, D203, D301, D302, D303 |
| 6 | 5V1 | D_SOD-123 | D204, D206, D207, D304, D306, D307 |
Show 35 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | CC+ | LED_D3.0mm | D205, D305 |
| 1 | CDSOT23-T24-Q | SOT-23 | D401 |
| 1 | SMAJ5,0A | D_SMA | D501 |
| 1 | P6SMB26 | D_SMA | D502 |
| 2 | P6SMB16 | D_SMA | D503, D504 |
| 1 | SMB-001 | SMB-001 | FB401 |
| 1 | SRF3225TAC-101Y | SRF3225TAC | L401 |
| 12 | 1µ | C_0805_2012Metric | C201, C207, C208, C211, C301, C307, C308, C314 +4 |
| 4 | 100µ | CP_Elec_5x5.8 | C202, C205, C302, C305 |
| 25 | 100n | C_0805_2012Metric | C203, C204, C206, C209, C210, C213, C214, C303 +17 |
| 5 | 1n | C_0805_2012Metric | C212, C313, C413, C414, C415 |
| 2 | 20p | C_0805_2012Metric | C405, C406 |
| 1 | 4µ7 | C_0805_2012Metric | C412 |
| 4 | 100µ | CP_Radial_D8.0mm_P5.00mm | C501, C502, C503, C504 |
| 8 | 470n | C_0805_2012Metric | C601, C602, C604, C606, C607, C608, C610, C612 |
| 4 | 5n6 | C_0805_2012Metric | C603, C605, C609, C611 |
| 6 | 10k | R_0805_2012Metric | R101, R211, R309, R401, R408, R409 |
| 1 | 100k | R_0805_2012Metric | R102 |
| 2 | R500 | R_2512_6332Metric | R201, R301 |
| 21 | 1k | R_0805_2012Metric | R202, R205, R207, R209, R212, R214, R216, R302 +13 |
| 2 | 200 | R_0805_2012Metric | R203, R303 |
| 10 | 5k1 | R_0805_2012Metric | R204, R213, R219, R221, R226, R304, R314, R315 +2 |
| 6 | 2k | R_0805_2012Metric | R206, R210, R215, R312, R322, R325 |
| 4 | 100 | R_0805_2012Metric | R208, R224, R307, R402 |
| 4 | 20k | R_0805_2012Metric | R217, R223, R317, R326 |
| 4 | 510 | R_0805_2012Metric | R218, R220, R316, R324 |
| 2 | 200k | R_0805_2012Metric | R222, R318 |
| 1 | 3k9 | R_0805_2012Metric | R225 |
| 1 | 12k | R_0805_2012Metric | R227 |
| 1 | 3k | R_0805_2012Metric | R327 |
| 1 | 1M | R_0805_2012Metric | R403 |
| 4 | 4k7 | R_0805_2012Metric | R404, R405, R406, R407 |
| 4 | 1k3 | R_0805_2012Metric | R601, R602, R611, R612 |
| 8 | 22k | R_0805_2012Metric | R603, R604, R605, R606, R613, R614, R615, R616 |
| 4 | 1k8 | R_0805_2012Metric | R609, R610, R619, R620 |
Symmetric power supply design files
The KiCad project lives in the Synthron/ModLab repository on GitHub; these links point at the commit this page was built from.
Symmetric power supply: common questions
What microcontroller does the Symmetric power supply use?
The Symmetric power supply is built around the STM32F103C8Tx, from the STM32 family.
How big is the Symmetric power supply PCB?
The Symmetric power supply measures 160 × 100 mm, has 4 copper layers and is 4.69 mm thick.
How many components are on the Symmetric power supply?
197 components, from 55 distinct parts. The full bill of materials is listed on this page.
Where can I download the Symmetric power supply design files?
From the Synthron/ModLab repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Symmetric power supply design in my own project?
The repository has no license, so all rights stay with Synthron. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Symmetric power supply without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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