small 12v heater element control Answered
Hi, looking for a bit of advice from electronically literate folks...
I'm planning a low-temp water heating device that will keep a water/yeast/sugar solution at around 38C to produce optimum levels of CO2.
so far what i have in mind is using a cheap 12v car immersion heater (the type used for making hot drinks on the go), powered by 4 x 3.7v lithium batteries in series (giving me roughly the right voltage range).
The part i'm now trying to figure out is regulating the heating of the solution. I'm considering using an LM35 component to monitor the temperature via contact on the outside of the vessel. What i'm stuck on is what other components would i need in the circuit to take the voltage output of the LM35 and use it to control the 12v immersion heater to maintain a temperature of around 35 degrees?
Any advice would be much appreciated, thanks!