Hi everyone and thank you for taking the time to read this. I know little to nothing about electronics and recently made a 5v 4-100ohm 1/4w resistor setup in parallel that put me at full capacity for my resistor wattage. My goal is to make a very small heating element the bottom of a hummingbird feeder that would prevent it from freezing, based upon a video I found (
). My operating temps would (only) be when it's near freezing or well below. My 100ohm setup works to generate some heat, but I feel like it could use a (bit) more and don't fully understand how to go about that. I would like to keep my supply to 5V if possible, so basically what I need to do is add more power (watts) to more capable resistors, right? something like 2 10ohm 5w resistors in parallel? (Example: ). If I ran 5V through 2 of those in parallel, I get 1amp, 5W of power? More power, more heat, right? I just don't understand which type of capacitor is best given they are made out of different materials along with heat dissipation thickness/heat sinks.... So now comes the tricky part. What temps am I going to get with that setup? I don't want to fry the bottom of the feeder or start a fire... Just a bit more heat, but I can't seem to find or figure out that calculation. Sorry for my ignorance and I wouldn't be surprised if you rolled your eyes reading this, but any help would be appreciated!