How to make a joule thief - Boost Converter

Joule Thief allows to use almost all of the energy of a single cell or a single cell battery. Thus, the circuit Joule Thief permits to increase the voltage of the source (battery, battery) above the minimum voltage required to operate the device connected to it. We can use the batteries and rechargeable batteries for longer, even when the voltage of the latter drops below their voltage, the joule thief standpipe. Joule Thief will extract the last available battery joules or acbcumulateur, hence its name!”