Category: hot tub

Replacing the electronics in a hot tub: Arduino to control pumps and the heater This is the third post in the series “Replacing the electronics in a hot tub”. The first post is here. This one is about the first version of the Arduino micro-controllers programming. I decided to separate the Sensors and Actuators circuits…

Replacing the electronics in a hot tub The previous post described the reasons for this projects. It also gave a brief description of the hot tub in which I will replace the electronics. Since I can’t play with the existing electronics until late spring (todays temperature was -20…) I will start preparing my controller using…

This is the first article of a series for a project with the goal of replacing the electronics in a hot tub from 2005. This Cal Spa tub is over twenty years old! The electronics have started to fail in recent years. Time to replace everything! I already replaced the secondary pumps controller after it…