This product is a 2-channel relay expansion board, suitable for Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+/4B, STM32, and Arduino. It comes with two relays on board, and can control shutdown independently.
Product Features：
- Supply voltage:5V
- Relay allows access to the load:250V/5A
- With relay working indicator, it is convenient to check the working status of the relay
- Optocoupler isolation circuit, strong anti-interference ability, stable work
- Open source demo codes available for Raspberry Pi
Specifications
| Size | 56mm(Length) x 34mm(width) |
| Optocoupler | LTV-357T-B-IN |
| Supply voltage | 5V |
The definition of the connection with the Raspberry Pi motherboard
| 2-CH Relay HAT | Pin function | BCM | wiringPi |
|---|---|---|---|
| 5V | 5V | 5V | 5V |
| GND | GND | GND | GND |
| CH1 | Channel 1 | 26 | P25 |
| CH2 | Channel 2 | 19 | P24 |
Resource Profile
① Relay output Relay control signal level and amplitude sliding switch, available 3.3V or 5V.
② Relay working indicator: when the light is on, it means that the normally open end of the relay is closed, the normally closed end is disconnected, and when the light is off, it means that the normally open end of the relay is disconnected and the normally closed end is closed.
③ Relay
④ Relay output
⑤ Power indicator
⑥ PH2.0 4PIN Module wire
⑦ 2.54mm 4PIN connector
Relay wiring diagram
WIKI
Package Contents
- 2-CH Relay HAT x1
- Accessory pack
2