2 layers
2 layers80.3 × 56 mm
Tachtalk pcb
docwilco/tachtalk-pcb- Size
- 80.3 × 56 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 42
- Nets
- 56
- Pads
- 162
- Tracks, vias
- 113, 9
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 13 Feb 2026
- Updated
- 31 Mar 2026
Overview
Tachtalk pcb is an open-source printed circuit board by docwilco, from the docwilco/tachtalk-pcb repository on GitHub. It is a 2-layer board of 80.3 × 56 mm with 42 parts on 56 nets, routed with 113 tracks and 9 vias.
It is built around the 74AHCT1G125SE, ESP32-S3-DEVKITC-1-N8 and SRV05-4. Its parts include 13 resistors, 6 capacitors, 4 diodes, 3 ICs and 2 connectors. It belongs with the ESP32 boards of this library.
Main components
3
74AHCT1G125SE
SOT-353-40℃~+125℃ 1 1 4.5V~5.5V 4.7ns@5V,50pF 40uA 74AHCT 8mA 8mA Schmitt trigger Tri-State Unidirectional SOT-353 Buffers, Drivers, Receivers, Transceivers ROHSDiodes IncorporatedBuffers, Drivers, Receivers, Transceivers
ESP32-S3-DEVKITC-1-N8
-- WiFi Modules ROHSEspressif SystemsWiFi Modules
SRV05-4
SOT-23-6L-55℃~+150℃ 15V 1pF 4A 5V 5uA 6V 80W ESD Four channels IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
Parts
42| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | Testpoint | DocWilco:TestPoint_Pad_2.0x2.0mm | GPIO4, GPIO5, GPIO6, GPIO7, GPIO9, GPIO10, GPIO11 |
| 4 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3, C4, C5 |
| 4 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R5, R6, R7 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R8, R9 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12, R13 |
| 2 | 22uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C6 |
| 2 | 330 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R11 |
| 2 | 5K1 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3 |
| 2 | Red | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2 |
| 2 | TestPoint | DocWilco:TestPoint_Pad_1.5x1.5mm | RGBDATA1, RGBDATA2 |
| 1 | 74AHCT1G125 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U2 |
| 1 | ESP32-S3-DevKitC | PCM_Espressif:ESP32-S3-DevKitC | U1 |
| 1 | Green | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4 |
| 1 | RotaryEncoder_Switch_MP | PEC11R-4020F-S0024:XDCR_PEC11R-4020F-S0024 | SW1 |
| 1 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6_Handsoldering | U3 |
| 1 | Screw_Terminal_01x03 | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-03P_1x03_P5.00mm | J2 |
| 1 | USB-C breakout module | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | Yellow | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
Questions
How big is the Tachtalk pcb PCB?
It measures 80.3 × 56 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Tachtalk pcb use?
42 parts, built around the 74AHCT1G125SE, ESP32-S3-DEVKITC-1-N8 and SRV05-4. 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 Tachtalk pcb KiCad files?
From the docwilco/tachtalk-pcb repository on GitHub, at the commit this page was made from: the board is tachtalk-pcb.kicad_pcb and its schematic tachtalk-pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tachtalk pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask docwilco before reusing the design.
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