New to post, but I come here often. So I am working on building a small fermentation chamber and i want to control the temperature using two Peltier's. One for hot and one for cold. I'm using two to help prevent thermal shock, and also use the way temperature works with heat rising and cold falling.
I have read a fair bit from this forum and others, but I can't find the answer to my basic questions.
Can I use a transistor as a switch to turn on and off a Peltier without any real problems?
I've seen a few posts about using a h-bridge ,or a variety of tec controllers. But none of the posts go into good detail, and I'm not that good on programming.
My basic design is to use an Arduino connected to a temperature sensor and the two Peltier's connected to the transistors and the power supply. Add a bunch of fans to circulate air, and program it turn hot on below x point and cold on above y point.
If there is a post that does answer my question sorry for the double post. But any help is appreciated. If you have questions about my project please feel free to ask. Thanks for the help.
EDIT: I am on working on the theory right now. I have not committed to any parts yet. I have been looking at easily available Peltier's usually running on 12V and varying amps. Everything else was gonna be commonly available parts.
My end goal is to have a controllable fermentation chamber, with commonly available parts, that's easy and cheap enough others to build. Most of the things I've seen are lacking information, or have too much complexity.