Joule Thief Circuit With Capacitor. This circuit is also known by other names such as blocking oscillator joule ringer vampire torch. Joule thief circuit is an oscillatory voltage booster which can boost small amount of voltage around 1v or less to a usable voltage to drive small loads like leds.
This way less power from the used supercapacitor is unusable. This circuit is also known by other names such as blocking oscillator joule ringer vampire torch. What is joule thief circuit.
The principle of work of the control circuit is following.
The circuit got its name as joule thief because circuit depict like it is stealing energy from the source. This voltage is produced by simple half wave schottky diode rectifier with capacitive filter the 3 3 uf 350v capacitor. It can use nearly all of the energy in a single cell electric battery even far below the voltage where other circuits consider the battery fully discharged. The drain terminal of this switch connects to the base of the joule thief oscillator transistor.
