RelayBoard
About the RelayBoard PCB
RelayBoard is an open source STM32 PCB design by SCFormulaElectric, published on GitHub. It is a 2-layer board measuring 53.5 × 71.2 mm, with 70 components from 42 distinct parts.
Its main chip is the SN65HVD230DR, from the STM32 family. Other key parts include the TPS563300 and AMS1117-3.3. By type, the board carries 30 resistors, 15 diodes, 10 transistors, 4 relays, 4 capacitors and 3 ICs.
From the project
- Update README.md file in each directory with the appropriate changes made - On schematics, please use boxes to section of parts of the circuit and use text boxes to describe functionality
Main components on the RelayBoard
RelayBoard bill of materials (BOM)
70 components, 42 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS563300 TPD4E05U06DQA | USON-10_2.5x1.0mm_P0.5mm | U2 |
| 1 | AMS1117-3.3 UA78M33QDCYRQ1 | TO-252-2 | U4 |
| 1 | SN65HVD230DR STM32C011F4Px | TSSOP-20_4.4x6.5mm_P0.65mm | U5 |
| 1 | ZXTN4004KTC AO3400A | SOT-23 | Q1 |
| 1 | AO3400A AO3407A | SOT-23 | Q3 |
| 2 | AO3400A | SOT-23 | Q4, Q5 |
| 1 | AO3400A AO3401A | SOT-23 | Q6 |
| 4 | AO3400A | SOT-23 | Q8, Q9, Q10, Q11 |
| 1 | AO3407A | SOT-23 | Q12 |
| 1 | Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | SMD0805-010-24V 0.25 A | Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 4 | HF42F/012-2HST | RELAYS-TH_HF42F-XX-2HSX-XXX | K4, K5, K6, K7 |
| 2 | Green Foshan NationStar Optoelectronics | LED_0805_2012Metric | 3V1, GLV1 |
| 3 | SM91502ALE 1N4148WX-TP | D_SOD-323 | D1, D2, D11 |
| 3 | C15771 1N4148WX-TP | D_SOD-323 | D3, D4, D5 |
| 1 | C2286 1N4148WX-TP | D_SOD-323 | D6 |
| 1 | C15771 SD15_SOD323 | D_SOD-323 | D7 |
| 1 | C89811 AZ23C10 | SOT-23 | D8 |
| 1 | ESD2CANFD24DBZRQ1 1N4148WX-TP | D_SOD-323 | D10 |
| 1 | C2297 BSPD | LED_0805_2012Metric | D13 |
Show 22 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1N4148WT IMD | LED_0805_2012Metric | D14 |
| 1 | SMF18CA BMS | LED_0805_2012Metric | D15 |
| 1 | SMF18CA Precharge | LED_0805_2012Metric | D16 |
| 1 | SMF18CA BZT52B-7-F | D_SOD-323 | D17 |
| 1 | 4.7UF 0.33μF | C_0402_1005Metric | C1 |
| 1 | 1UF 0.1μF | C_0402_1005Metric | C2 |
| 1 | 100NF 100nF | C_0402_1005Metric | C6 |
| 1 | 2.2UF 4.7μF | C_0402_1005Metric | C7 |
| 1 | 13k | R_0603_1608Metric | R1 |
| 3 | 100k | R_0603_1608Metric | R2, R7, R16 |
| 1 | 100 | R_0603_1608Metric | R3 |
| 1 | 0603WAF604JT5E 10k | R_0603_1608Metric | R4 |
| 1 | 0603WAF604JT5E 12k | R_0603_1608Metric | R5 |
| 5 | 10k | R_0603_1608Metric | R6, R10, R11, R12, R14 |
| 2 | 12k | R_0603_1608Metric | R8, R18 |
| 7 | 47 | R_0603_1608Metric | R9, R13, R15, R17, R22, R25, R30 |
| 1 | 27k | R_0603_1608Metric | R19 |
| 1 | 820Ω UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R20 |
| 1 | 4.7kΩ UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R21 |
| 1 | 8.3k | R_0603_1608Metric | R23 |
| 4 | RTT12100JTP 100k | R_0603_1608Metric | R26, R27, R28, R31 |
| 1 | RTT12100JTP 47 | R_0603_1608Metric | R29 |
RelayBoard design files
The KiCad project lives in the SCFormulaElectric/USC-Electrical-Systems repository on GitHub; these links point at the commit this page was built from.
RelayBoard: common questions
What microcontroller does the RelayBoard use?
The RelayBoard is built around the SN65HVD230DR, from the STM32 family.
How big is the RelayBoard PCB?
The RelayBoard measures 53.5 × 71.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the RelayBoard?
70 components, from 42 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 RelayBoard design files?
From the SCFormulaElectric/USC-Electrical-Systems 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 RelayBoard design in my own project?
The repository has no license, so all rights stay with SCFormulaElectric. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the RelayBoard 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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