The term “relay” is usually only mentioned when a component like a fuel pump or a fan stops working, or some new current-hungry device is being installed. Because they’re literally small black boxes, ...

Relay board with 8x 24 VDC relays rated for 8A. This board is designed to be used togheter with ESP-24V-16CH and ESP-24V-32CH, but can be driven by any 24V control circuit compatible with NPN inputs.

ESP32 based board with 16x 24 VDC inputs and 16x 24 VDC transistor outputs for external relays. Also included is a 1-Wire interface for external sensors. The dimensions were chosen for mounting on a ...