Hey Azot, I’ve got this old board that keeps getting cold under load, and I’m thinking a slow, controlled exotherm might keep it warm enough without a thermocouple. Any chemistry tricks that would give steady heat without blowing the whole thing up?

Sounds good, but just a heads‑up—iron powder packs can be finicky. If the mix is too moist it won’t heat up fast enough, and if it’s too dry the reaction stalls. Same with magnesium: you need a bit of air to keep the burn even, but a sealed tube means you’ll have to trust the pressure stays low. If you’re worried about a sudden pressure spike, maybe use a small ceramic cup, put a few grams of magnesium in it, seal it with a rubber stopper, and add a pinhole for venting. That way you get a steady, low‑grade heat source without the risk of a bang. Keep an eye on the temperature, though; you don’t want the board getting a little too cozy.