TSAC Relay Controller
About the TSAC Relay Controller PCB
TSAC Relay Controller is an open source ESP32 PCB design by sufst, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 73 × 65.3 mm, with 54 components from 37 distinct parts.
Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the AP2112K-3.3, CH340C and LTC-4627JR. By type, the board carries 14 capacitors, 13 resistors, 9 diodes, 6 connectors, 5 transistors and 4 ICs.
From the project
Monorepo for all schematics and PCB designs
We design our PCBs in KiCad (version 8+).
Files that should be in this repo, under version control: - Project files (.kicadpro). - Schematic files (.kicadsch). - PCB files (.kicadpcb). - Custom footprints (.kicadmod). - Custom symbols (.kicadsym). - Footprint library tables (fp-lib-table). - Symbol library tables (sym-lib-table). - 3D models of components (.step files). - Simulation code (e.g. .asc` files from LTSpice).
Main components on the TSAC Relay Controller
TSAC Relay Controller bill of materials (BOM)
54 components, 37 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP2112K-3.3 40106 | SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | CH340C 4081 | SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | ESP32-S3-WROOM-1 4013 | SOIC-14_3.9x8.7mm_P1.27mm | U4 |
| 1 | LTC-4627JR 40106 | SOIC-14_3.9x8.7mm_P1.27mm | U5 |
| 5 | XP262N7002TR-G | SOT-23 | Q1, Q2, Q3, Q4, Q5 |
| 1 | USB_C_RECEPTACLE_USB2.0_16P PWR | Molex_Micro-Fit_3.0_43045-0412_2x02_P3.00mm_Vertical | J1 |
| 1 | CONN_01X04 Control | Molex_Micro-Fit_3.0_43045-0412_2x02_P3.00mm_Vertical | J2 |
| 1 | CONN_01X04 Inverter | Molex_Micro-Fit_3.0_43045-0412_2x02_P3.00mm_Vertical | J3 |
| 1 | CONN_01X04 BMS | Molex_Micro-Fit_3.0_43045-0412_2x02_P3.00mm_Vertical | J4 |
| 1 | CONN_01X04 States | Molex_Micro-Fit_3.0_43045-0412_2x02_P3.00mm_Vertical | J5 |
| 1 | CONN_01X04 Relays | Molex_Micro-Fit_3.0_43045-0412_2x02_P3.00mm_Vertical | J6 |
| 1 | 0448.500MR | Fuse_Littelfuse-NANO2-451_453 | F1 |
| 2 | G5Q-1A-EU DC12 | Relay_SPDT_Omron-G5Q-1 | K1, K2 |
| 4 | BAT54W | SOT-323_SC-70 | D1, D7, D8, D10 |
| 1 | SS14+ | D_SMA | D2 |
| 3 | ESD9B3.3ST5G BAT54W | SOT-323_SC-70 | D3, D4, D6 |
| 1 | BAT54W | SOT-323_SC-70 | D5 |
| 1 | 1UF 100u | CP_Radial_D5.0mm_P2.00mm | C1 |
| 1 | 10NF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 10UF 10u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
Show 17 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1UF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 470UF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 2 | 100NF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6, C9 |
| 1 | 100UF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 10UF 1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 10UF 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 180UF 1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11 |
| 1 | 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12 |
| 2 | 100u | CP_Radial_D5.0mm_P2.00mm | C13, C14 |
| 1 | 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 3 | 10K 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4, R5 |
| 1 | 5.1K 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 10K 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | 51K 47k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 4 | 51K 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11, R12, R14, R17 |
| 1 | 51K 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18 |
TSAC Relay Controller design files
The KiCad project lives in the sufst/pcb repository on GitHub; these links point at the commit this page was built from.
- Layouttrc/trc.kicad_pcb
- Schematictrc/trc.kicad_sch
- BOMrelease/batak/bom.xlsx
TSAC Relay Controller: common questions
What microcontroller does the TSAC Relay Controller use?
The TSAC Relay Controller is built around the ESP32-S3-WROOM-1, from the ESP32 family.
How big is the TSAC Relay Controller PCB?
The TSAC Relay Controller measures 73 × 65.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the TSAC Relay Controller?
54 components, from 37 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 TSAC Relay Controller design files?
From the sufst/pcb 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 TSAC Relay Controller design in my own project?
Yes, under the terms of its GPL-3.0 license, which sufst chose for the repository.
Can I test firmware for the TSAC Relay Controller without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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