And THAT is why I throttled it back as much as I did. It works, but is slightly luke-warm-ish. Considering the time and components I need to make what I have perfect for me, buying this circuit actually saves me time and money. Using this function generator I can much more easily set up a range of heat on demand by turning a knob. Easy-Peasy. It is very much like using a Coleman camp stove. Start it on a low flame and then turn a knob to increase the flame to what you want. It's kind of that easy, but instead of a valve creating more or less gas flow you have something that supplies little pulsed squirts of gas. Run it faster and it squirts more gas and vice versa.
There are a few safety factors included, like a thermo switch that turns on a glow plug when the combustion chamber temp gets too low, a circuit breaker switch for when the combustion chamber temp gets too high and a circuit that keeps the combustion chamber fan running for a while after the heater is turned off to evacuate the chamber of any unburned fuel (although Dan's newer heater has a few more, like a circuit to watch for a flame in addition to combustion chamber temps - it's pretty sophisticated).
Including a cabin climate control thermostat on mine has been pretty cool and it works great, it just needs a bit more heat output, but that was my own doing. This new stuff will just be "Rev 01" of my (and Dan's) original work. If it works, I can spec it out for other people with BN2 heaters with failing fuel pumps (see Danny's note of dead fuel pumps up above) and maybe resurrect a few more of them. Without this approach you simply can not get BN2 fuel pump parts anymore.
I, too, got my first Ham Radio license when I was ten and built my own transmitter, an Eico 720. That was back in the days of vacuum tubes (1960). In junior high ('64) Science Fair, I built a transistor logic demonstration using Dual J-K flip flops, the basic building block of digital computers (it's basically an electronically latching toggle switch). Absolutely none of the judges understood what I was showing them.