Nuheat HOME thermostats cost around $200 a shot. Although very nice, they suffer from being destroyed by electricity spikes. Faced with needing yet another replacement, hacker Sergey has turned to the Raspberry Pi to provide a better, more cost-effective solution.In the end, it was about 25% cheaper and features a Pi Zero W, a 7-inch touchscreen running Chromium in kiosk mode, some power circuitry and analog-to-digital converter and a white picture frame to house the whole thing. The build has been documented thoroughly and you can read how he did it here.