This time I will be taking apart an M5Stack Relay Unit that looks like a pretty simple relay module at first glance but has a relatively high price tag. ... What I found inside perplexed me, the ...

This board also has circuitry to support a 12V PWM fan. This board uses compact solid state relays that are able to handle high power. This is an alternative to using an off the shelf relay module ...

Circuit Diagram: Relay module: Connect the IN pin of the relay to a GPIO pin (e.g., D1 or GPIO5). ESP8266 or ESP32: Make sure the relay module's VCC and GND are properly connected to the board.

The smallest quad-channel relay board I’ve seen so far is the one by Seeed Studio using an STM32 MCU and solid-state relays that measures just 60 x 40mm, but the relays only support up to 2A. ESP32 ...

July 21, 2011 - Highland Technology releases model V210 relay board. The V210 has 64 SPDT electromechanical power relays under ... Relays are rated for 2 amps, 240 VAC, 60 watts maximum. The module is ...