Homemade Emergency LED Light Bulb. A very simple inverter circuit and How to Make a Toroid Transformer. My second inverter circuit DC to AC make it or diy. This Efficient joule thief can take as very little voltage 0.5V to 3v "AA Battery" to Boost Set Up AC or pulsed DC to turn on 120v or 220v small current 1.5w to 3 watt LED Bulbs can be achieved. Yes! to steal all the last energy from a little battery.
Testing Emergency Light 2 Using Oscilloscope ᴴᴰ