This is a relay expansion board specially designed for Raspberry Pi
with 3 or 8 relays control.
Generally, the Raspberry Pi is used in the field of weak
electricity.
Using this product can make the Raspberry Pi enter the strong
electricity field such as smart home.
Through its connection, the Raspberry Pi can control home appliance
devices easily.
Features :
1. Based on Raspberry Pi 40pin GPIO interface, suitable for
Raspberry Pi series motherboards
2. Adopt high-quality relays and allow load connection: ≤5A 250V AC
or ≤5A 30V DC
3. With optocoupler isolation to avoid high-voltage circuit
interference
4. With relay indicator, easy to check the working status of the
relay
5. With relay selection jumper cap, it is convenient to switch
other pins of Raspberry Pi for control
1. Raspberry Pi GPIO interface :
Easy access to Raspberry Pi
2. Relay terminal :
Convenient for external control lines
3. Relay
4. Optocoupler : PC817 optocoupler chip
5. Relay working indicator :
LED is on, normally closed end of relay is open, normally open end
is closed
LED is off, normally closed end of relay is closed, normally open
end is disconnected
6. Power Indicator
7. Relay control pin selection jumper :
Jumpers Connecting: Connecting to the I / O specified by the sample
program
Disconnect the jumpers: you can use the connection cable to access
the custom I / O
