Hot Tub Controller Hack part 2

Link to this video's blog posting. http://www.toddfun.com/2017/04/03/hot-tub-controller-hack A friend has a Coleman hot tub from 1994 and the controller has failed. It's a strange failure and I think I can modify the controller and add a hacked in a cheap Chinese temperature control module along with a switch to turn the jets on/off while still using 90% of the original control board. In part 1 video I review the hot tub failure and a possible hack solution. https://youtu.be/VnoO_QKrwNA In this part (part 2 video) I setup a test rig and evaluate what is functional and reusable on the original control board. Then I test out an override hack that will let me control the defunct features using a simple 5 volt control line. In part 3 video I test the final hacked hot tub control at the bench. https://youtu.be/0-x5lgB8Xek bigclivedotcom video I refer to in my video https://youtu.be/9zymx2xgTmk Where I purchased my Chinese temperature control module http://www.ebay.com/itm/XH-W1411-12V-Multi-functional-Temperature-Controller-Thermostat-Control-Switch-/401234031407 You can help support my channel by purchasing items from my Amazon Store at no additional cost simply by using my store links. I have lots of store categories and I own most items or similar items that you'll find in my store. http://astore.amazon.com/tod0f5-20 Thanks for joining and please subscribe to my YouTube channel. https://www.youtube.com/user/toddrharrison