OpenTRV-ESP
mpiraux
An open-source and open-hardware thermostatic radiator valve based on the ESP32C6 and the 28BYJ-48 stepper motor.
Components (30)
| Reference | Value | Description |
|---|---|---|
| Q1 | FDN340P | -2A Id, -20V Vds, P-Channel MOSFET, 70mOhm Ron, SOT-23 |
| Q2,Q3 | BSS123 | 0.17A Id, 100V Vds, N-Channel MOSFET, SOT-23 |
| U1 | SHT40 | Digital Humidity and Temperature Sensor, +/-1%RH, +/-0.1degC, I2C, 1.08-3.6V, 16bit, DFN-4 |
| U2 | HT7833 | 500mA low dropout linear regulator, fixed 3.3V output, SOT-23-5 |
| U3 | ESP32-C6-MINI-1/U | |
| U4 | TLV61048 | 28-V Output Voltage Boost Converter with Power Diode and Isolation Switch, SOT-23-6 |
| U5 | SN74LVC2G14DBV | Dual schmitt inverter, VCC from 1.65 to 5.5 V, SOT-23 |
| U6 | TB6612FNG | Driver IC for Dual DC motor, SSOP-24 |
| U7 | INA219AxDCN | Zero-Drift, Bidirectional Current/Power Monitor (0-26V) With I2C Interface, SOT-23-8 |
| C1,C4,C7,C10,C12,C16-C18 | 100n | |
| C2,C3,C8 | 1µ | |
| C5,C9,C11,C15 | 10µ | |
| C6 | 330uF 6.3V | Unpolarized capacitor |
| C13 | 10uF 25V X5R | Unpolarized capacitor |
| D1,D3,D4 | 1N5819WS | 40V 600mV@1A 1A SOD-323 Schottky Barrier Diodes, SOD-323 |
| D2 | LED | |
| J2 | I2C | Generic connector, single row, 01x04, script generated |
| J3 | Buttons | Generic connector, single row, 01x04, script generated |
| J4 | Screen | Generic connector, single row, 01x08, script generated |
| J5 | Stepper Motor | Generic connector, single row, 01x05, script generated |
| L1 | 2.2uH | Inductor |
| P1 | USB_C_Plug_USB2.0 | USB 2.0-only 14P Type-C Receptacle connector |
| R1,R2,R4,R12 | 1M | |
| R3,R5-R11,R16 | 10k | |
| R13-R15 | 180k | |
| R17,R19 | 100R | Resistor |
| R18 | 20m | Resistor |
| SW1 | EN Push | |
| SW2 | Boot | |
| TP1,TP2 | V_SM | test point |