Need a small 12v heat source for simulated HVAC project
Okay, so for our year end micro controller project we need to control a temperature inside two 2L pop bottles connnected together. We have a computer fan mounted at the end of the "heating bottle" which needs a heat source in it. The fan will blow the hot air from "heating bottle" into "temperature bottle" which contains an analog temperature sensor. We have to control a set reference temperature point in "temperature bottle" using a PIC16f690 microcontroller by manipulating the fan speed and heat ON/OFF.
Problem: I need a decent heating source inside "heating bottle" . Ive been using 12v automotive lightbulbs which work great for a minute or two but then die out. My crappy power supply can only pump out 1 amp, could this be why? Any suggestions on what to use as a heat source? I was thinking some 5w resistors but classmates have said our power supplys cant handle them either.
Thanks in advance!