Voltage Transfer Circuit

This circuit uses to supply small voltages to LEDs or other low power devices in the situation when we cant connect the power supply directly to it. Ideally this uses the theory of voltage transfer using an oscillator and a toroidal transformer.

Circuit Diagram of Voltage Transfer : Click  to enlarge

Working

T1 and T2 transistors BC547 and BC558 respectively produce oscillations and we get it at its output terminals P & Q. Consider a long wire that connects the P and Q. Then take a toroidal transformer with 10mm Diameter.(It may found in ordinary electronic chokes which consist of a ferrite core surrounded with copper wires). Tangle 36 SWG enameled copper wires on the ferrite ring and connect a white LED at the end leads. Hang the above core on the connected lengthy wire. When ever the circuit powers up, the LED will glow. Here the toroidal transformer work as primary coil and the connected wire act as secondary coil. We can use this circuit whenever we want to connect components like LEDs without directly connecting lead wires to circuit.

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