4 channel relay module 4-channel relay control board with optocoupler.

Description

Product details of Arduino 4 channel relay module 4-channel relay control board with optocoupler. Relay Output 4 way relay module

• The new 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.