This relaxation oscillator circuit is actually pretty interesting, and I was thinking of applying it. A friend of mine is a flight sim enthusiast, and he built his own TrackIR rig out of a ballcap and some LEDs, to avoid having to pay for the expensive, "official" headset. Problem is it runs off expensive 9V batteries and chews through them like no one's business. I was thinking that this oscillator circuit could help him power it off of cheaper AA batteries, and also get more Whr out of each battery.
What do you think of my revised circuit?
I added R2, as I noticed in Spice that Q2's base was pulling ~120mA with no resistor, which seemed inefficient. Adding the resistor drops it to ~20mA. I also added a trim pot to allow the LED brightness to be tuned with different batteries.
Think this would work well, or would I be better off with the "classic" Joule Thief circuit?