Ok, so for the past few days, i've been getting more and more interested in Peltier Modules, and i've finally decided to make a portable mini fridge with one. After MANY long hours of research, part selection, crying, and cussing, I finally came up with a circuit diagram that seemed pretty solid.
That is, until I showed it to my chemistry teacher. (He is VERY experienced with computing and circuits)
He says that if I hook up this circuit, it will most likely overload and die out, but he doesn't know why, because his teachers didn't explain it in great detail. He said that I should hook up a resistor and a fuse, but didn't tell me the specifics: how many Ohms, voltage, etc...
Keep in mind, this isn't my first time playing around with circuits. I have grasped the basics and I understand some stuff. However, this is my first time messing around with batteries in a major way. I.E: I have used batteries, like 2 AA batteries for my small breadboard projects; NEVER have I used a 12V, 20 AMPHOUR battery before! So when it comes to the big stuff, i'm a total noob.
I would appreciate it if someone can help me fix my circuit before I turn it on for real! I really would not like to throw away $160 in parts!
A picture of my diagram is below: NOTE: Some stuff has changed, like the temperature sensor now being one unit, not a probe and main unit.
If anyone can provide me a diagram or design schematic of my fridge that works without overloading or not working in general, you will receive my eternal respect and gratitude!!!