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Smart Electronics 4 channel 5V 12V 24V relay module with optocoupler low level trigger development board module

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Smart Electronics 4 channel 5V 12V 24V relay module with optocoupler low level trigger development board module

4 channel 5V 12V 24V relay module with optocoupler low level trigger development board 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 drive to increase the relay coil control pins high impedance.
The control pin has a pull-down circuit to prevent malfunction relay vacant.
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4 Channel Way DC 5V 12V Relay Module with Optocoupler Low Level Trigger Expansion Board
5V 12V Optional, please advise which voltage you need when order. 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.

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