6 layers158 × 174 mm
TritonECU Main
alpauna/TritonECU
ESP32-S3 engine control unit — fuel injection, ignition timing, wideband O2 (CJ125/LSU 4.9), dashboard, and MQTT telemetry
457 parts10
4 layers100 × 80 mm
Features: - Input protection stage - TVS surge suppression - Analog signal conditioning - Amplification - Level shifting - Anti-alias filtering - STM32 ADC acquisition - TFT waveform display
- Size
- 100 × 80 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 85
- Pads
- 223
- Tracks, vias
- 186, 23
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 1 Jul 2026
- Updated
- 1 Jul 2026
Overview
STest is an open-source printed circuit board by Aryan-Kodan, from the Aryan-Kodan/STM32_Oscillator repository on GitHub. It is a 4-layer board of 100 × 80 mm with 34 parts on 85 nets, routed with 186 tracks and 23 vias.
It is built around the BAT54S and SMAJ24CA. Its parts include 16 resistors, 8 ICs, 7 capacitors, 2 diodes and 1 connector. It belongs with the STM32 boards of this library.
Main components
2README
README.mdSTM32 Portable Oscilloscope
Overview
A portable oscilloscope designed using STM32F103, KiCad and LTspice.
Features:
- Input protection stage
- TVS surge suppression
- Analog signal conditioning
- Amplification
- Level shifting
- Anti-alias filtering
- STM32 ADC acquisition
- TFT waveform display
Specifications
| Parameter | Value |
|---|---|
| MCU | STM32F103C8T6 |
| Input Range | ±20V nominal |
| Protection | TVS + clamp diodes |
| ADC Range | 0-3.3V |
| Filter Bandwidth | 100kHz |
| Display | EA_eDIPTFT32-A |
Analog Front End
Input ↓ Protection ↓ Attenuator ↓ Buffer ↓ Gain ↓ Scale ↓ Offset ↓ Inverter ↓ Low Pass Filter ↓ ADC Driver
Tools Used
- KiCad
- LTspice
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 10k | Resistor_SMD:R_0805_2012Metric | R4, R5, R7, R8, R9, R10, R11, R12, R15, R16 |
| 6 | 100n | Capacitor_SMD:C_0805_2012Metric | C2, C5, C7, C8, C9, C10 |
| 6 | MCP6002-xMC | Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.75x1.45mm | U1, U2, U3, U4, U5, U6 |
| 1 | 1.6k | Resistor_SMD:R_0805_2012Metric | R13 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | 15k | Resistor_SMD:R_0805_2012Metric | R6 |
| 1 | 1n | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 47 | Resistor_SMD:R_0805_2012Metric | R14 |
| 1 | 900k | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | BAT54S | Package_TO_SOT_SMD:SOT-23 | D2 |
| 1 | Conn_Coaxial | Connector_Coaxial:BNC_Amphenol_031-6575_Horizontal | J1 |
| 1 | EA_eDIPTFT32-A | Display:EA_eDIPTFT32-XXX | U8 |
| 1 | SMAJ24CA | Diode_SMD:D_SMA | D1 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U7 |
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Questions
How big is the STest PCB?
It measures 100 × 80 mm and has 4 copper layers, 1.6 mm thick.
What parts does the STest use?
34 parts, built around the BAT54S and SMAJ24CA. 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 STest KiCad files?
From the Aryan-Kodan/STM32_Oscillator repository on GitHub, at the commit this page was made from: the board is KiCad/STest.kicad_pcb and its schematic KiCad/STest.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STest design in my own project?
Its repository states no licence, so its author keeps all rights: ask Aryan-Kodan before reusing the design.