/diy/ - Do It Yourself

Alright, that took way too long. It's a good thing I enjoy tedious algebra. Bike anon here. So I've been looking at driven LC oscillators for the transformer because there's nothing quite like a sinusoid, but figuring out how to change the frequency (doing so changes the EL wire colour by a bit) was racking my brain, because to use a normal little trimmer cap would require a massive inductor. So I decided to replace the capacitor with two different capacitors with a potentiometer in between, so changing the potentiometer would change the total reactance. A couple of hours later and I got pic related out of it, where frequency in hertz is on the y axis, and resistance out of a 20k pot in ohms is on the x axis. While it's not very linear, I think I should be fine with it. Now the problem is figuring out a transistor-driven oscillator circuit that works with it.