Simple Darlington Joule Thief

(Sorry about crappy video, Google compressed it too much) Yet another Joule Thief circuit. This one is a rather simple voltage tripler (at least) with few parts. Using a TIP112 Darlington transistor instead of two switching or power transistors, this makes an efficient and simple circuit to extract many volts out of your DC supply. The multiplying capacity seems to be an inverse ratio, ie: 1.2V in yields 8V out, yet 8V in yields 31V out. Seems pretty stable. I will load test with more detailed numbers when I get a replacement digital multimeter. Oh wait, I'll use my scope - duh!
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