https://stream.echo6.co/videos/watch/f2cec8eb-e022-4c1d-b776-b9cea0cb16e3 If you've ever heard a loud click at a random time from your fridge or freezer, it's most likely the defrost timer initiating a cycle. You'd think it might be something simple like a continuous timer that switches from running to defrosting for a specific amount of time each day, but it's much more clever than that. It only accumulates time between defrosts based on the total amount of compressor run time, and will terminate the defrost and switch back to chilling as soon as the maximum defrost temperature is reached. The gear mechanism itself is very clever. It uses a special type of gear wheel that increments the next gear in single steps per revolution to allow a long time interval, and uses a similar gear to turn the switch cam in decisive steps to allow the contacts to change state twice in a very short rotation angle. The contacts are moved by two spiral cams that gradually reset them for most of the revolution, but then have a sudden snap action at the end. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- http://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty. Mon, 13 Apr 2026 11:21:38 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/f2cec8eb-e022-4c1d-b776-b9cea0cb16e3 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.