Waiting for servos

I've been wondering where my servos are because I'm excited to get going! It turns out that they've been in the process of getting to the Hong Kong post office. But I'm happy to know that they officially shipped today. In the meantime, I have an idea of how to logistically control the temperature.

To start the shower, the hot knob will be turned up all the way. As it gets hotter, the cold will be turned up to compensate. If hot water starts to run out, cold will be reduced until it's all the way off. In a situation where the cold water in the pipes isn't very cold, it will turn up all the way. If the temperature is still too hot, the hot water will be turned down until it's all the way off. Once one of the knobs is all the way off and the water isn't the right temperature, it will make some kind of signal. Here's a graphic that I made!

So lots of great ideas. I just have to stay strong once the parts arrive this week and I actually start to build this thing and run into problems!