This is a hardware implementation for my ESP8266-MQTT-io-node project.
Features:
Provides one bistable latching relay channel. Connectors are provided for a link LED and a local button to latch and unlatch the relay. A dual voltage isolated power supply mounts over the top of the latching relay. The relay is capable of switching a 16 Amp resistive load at 250VAC, or a 20 Amp resistive load at 125VAC. See relay data sheet for further details. There are screw terminals for attaching the AC wiring at the rear of the board (behind the power supply).
EDA Software
This board was designed using KICAD.
Board Size
10cm x 10cm
Board Blank Availability
Board Blanks are available on Tindie:
https://www.tindie.com/products/hwstarsr/board-blank-for-esp12-appliancemod
Firmware
The firmware for this project can be found here:
https://github.com/hwstar/ESP8266-MQTT-io-node
LICENSE
Creative Commons Attribution Share-Alike license. (CC-BY-SA)
Disclaimer
Build and use at your own risk. This board design uses lethal mains voltages. I will not be responsible for any damages including but not limited to: errors or omissions, loss of life, or property damage. You have been warned.