Simple 6V to 12V Converter Circuit Using Transistor BC547-BD679

This is a design circuit for converter circuit. This circuit is based on transistor as controller the circuit. There are two types of transistor that is BC547 and BD679. This circuit is a simple design of converter or inverter. This is the figure of the circuit.


This inverter circuit can use to 800mA of 12V power supply with a 6V. For example could you 12V Car Accessories (UK turning into a 6V) Car. The circuit is simple, more than 75% efficiency and very helpful. By changing a few components you, you also change for different voltages. L 1 is a custom inductor wound with about 80 turns 0.5 mm magnet wire a ring around the core with an outer diameter of 40 mm. Different values of D3 can be used to obtain different output voltages from 0.6V to 30V is about. Note that at higher voltages, the circuit could perform just as well and can’t produce much electricity. You may need to use a larger C3 for higher voltages and / or higher currents.

Part of components
R1, R4 2 .2 K 1/4W Resistor
R2, R3 47K 1/4W Resistor
R5 1K 1/4W Resistor
R6 15K 1/4W Resistor
R7 33K 1/4W Resistor
R8 10K 1/4W Resistor
C1, C2 0.1uF Ceramic Disc Capacitor
C3 470uF 25V electrolytic capacitor
1N914 diode D1
D2 Diode 1N4004
D3 12V 400mW Zener Diode
Q1, Q2, Q4 BC547 NPN transistor
BD679 NPN transistor Q3