Description This is an ESP8266 Wi-Fi-Based 4-Channel Relay Module for Home Automation Project. This Board Included the Esp8266 module, AC-DC Power converter, 4-Channel 5V Relays, 817 Opto-couplers and through-hole LED for...
Description Its a relay module, its used in electronic circuit as a switching device this module has the pins which is for Signal, GND, VCC. T90 relay is a type...
