Had an ancient boiler in a poorly insulated house that would sometimes trip out until manually reset (flip the power off and back on), yielding a cold house and

Had an ancient boiler in a poorly insulated house that would sometimes trip out until manually reset (flip the power off and back on), yielding a cold house and unhappy spouse. Built a microcontroller driving a normally-closed relay to interrupt the power for 1 minute out of every 120. No more cold mornings. I later added temperature sensing, smarter resetting based on temperature (to prevent power cycling a working boiler), and a webserver to it: https://imgur.io/a/VM7nD74 https://imgur.io/a/VM7nD74 (the graph is an SVG; everything was generated on the local ESP8266)