6pcs 1 Channel DC 3V Relay Power Switch Module with Optocoupler Isolated Drive Control Board for ESP8266 Microcontroller Development Logic Level Boards

1 channel SRD-DC03V-SL-C equiped with high-current relay, compatible load: AC250V 10A ; DC30V 10A, each relay has normally open and normally closed contact, can be selected by jumper relay and TTL or ground. 1 channel 3V/3.3V power relay mdoule support photocoupler isolation control, support dual power supply input ensure high anti-iinterference ability, which can be input from microcontroller IO, with diode freewheel protection. The relay module is triggered by high level signal, with output signal indicator, signal input port can be connected to the I0 port of the single chip microcomputer and driven by high-level signal. The 3v relay board works well with ARM /PIC /AVR /MCU/Raspberry/CNC machine/NodeMCU/ ESP8266 module etc. 1 channel 3V relay module external wiring adopts the rotary crimping terminal to make the wiring more firm. It is equipped with a fixed installation hole for easy installation.