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5V 4-Channel Relay Module Shield for Arduino
5V 4-Channel Relay Module Shield for Arduino ARM PIC AVR DSP Electronic 5V 4 Channel Relay.4 road 5V Relay Module
5V Relay Module
Can be used as microcontroller development board module can be used as home appliance control
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 drive to increase the relay coil control pins high impedance.
The control pin has a pull-down circuit to prevent malfunction relay vacant.