The new 5V Relay Module
5 V-12V to TTL control signal.
The control signal DC or AC, 220V AC load can be controlled.
There is a normally open and one normally closed contact.
A power indicator light.
A control indicator, pull off, disconnect does not shine.
Transistor drives to increase the relay coil control pins high impedance.
The control pin has a pull-down circuit to prevent malfunction relay vacantly.
Eight Channel Relay Module.