
OpenWatts
ikonis/OpenWatts
OpenWatts is a crank-mounted, single-sided cycling power meter built around an ESP32-C3. A bonded strain-gauge bridge and HX711 measure crank torque, while an LSM6DS3 IMU provides cadence and motion wake.

Esp32c3-vertical is an open-source printed circuit board by BruceAKABear, from the BruceAKABear/c3vt repository on GitHub. It is a 4-layer board of 17.5 × 17 mm with 17 parts on 35 nets, routed with 115 tracks and 25 vias.
It is built around the ESP32-C3-MINI-1 and ME6211C33M5G-N. Its parts include 8 connectors, 3 capacitors, 3 resistors and 3 ICs. It belongs with the ESP32 and RISC-V boards of this library.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | Conn_01x01_Socket | BLab:CON_1X2 | J1, J2, J3, J4, J5, J6, J7, J8 |
| 3 | 10K | Resistor_SMD:R_0603_1608Metric | R1, R2, R3 |
| 3 | 1uf | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3 |
| 1 | DOWNLOADER | BLab:DOWNLOADER | U1 |
| 1 | ESP32-C3-MINI-1 | PCM_Espressif:ESP32-C3-MINI-1 | U2 |
| 1 | ME6211C33M5G-N | Package_TO_SOT_SMD:SOT-23-5 | U3 |
It measures 17.5 × 17 mm and has 4 copper layers, 1 mm thick.
17 parts, built around the ESP32-C3-MINI-1 and ME6211C33M5G-N. 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.
From the BruceAKABear/c3vt repository on GitHub, at the commit this page was made from: the board is esp32c3-vertical.kicad_pcb and its schematic esp32c3-vertical.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask BruceAKABear before reusing the design.

ikonis/OpenWatts
OpenWatts is a crank-mounted, single-sided cycling power meter built around an ESP32-C3. A bonded strain-gauge bridge and HX711 measure crank torque, while an LSM6DS3 IMU provides cadence and motion wake.

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