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For the term "double v gate using horseshoe magnettrackback".

Arduino: TKLightMeter v 0.1: A Simple Irradiance Meter Using TSL235A

This little gadget is primarily for Joule Thief research, where the relative brightness of an LED must be compared or monitored as conditions change. The TSL235A is a small sensor that converts light intensity…

Joule Thief Lights 100 LEDs Using 1 Wire Only!

My modified Fuji camera AA circuit lighting a string of 100 clear LEDs using only one wire from the circuit. All I have to do is hold my hand near the battery and it lights. When I bring my other hand close to the LED string, they get brighter. This is…