3-Channel 5V Raspberry pi relay Shield Module Extension board Shield for Raspberry Pi A+/B+/2 B/3B/3B+

[My characteristics]

Relay expansion board for Raspberry Pi Zero/Zero W/Zero WH/A+/B+/2B/3B/3B+
Using high-quality relays, load can reach: AC 250V/5A, DC 30V/5A
With optocoupler isolation to avoid high voltage circuit interference
With relay indicator for easy viewing of the working status of the relay
With relay selection jumper cap, it is convenient to switch other pins of Raspberry Pi for control
Relay
Optocoupler
PC817 optocoupler chip
Relay work indicator
The LED is on, the relay is normally closed, and the normally open end is closed.
The LED is off, the relay is normally closed, and the normally open end is disconnected.