Power Supply Adapter

Here is the 6V to 12V DC voltage doubler circuit design, it also called DC voltage miltiplier or DC to DC converter. This dc voltage doubler circuit will need about 2A from the 6V input supply to produce the full 800mA at 12V for the power output. This circuit is very useful to generate higher voltage from a low power source, but this circuit will deliver low output current. So it should only be used for low current driven applications. Also, the output voltage may be unstable, so a voltage regulator (IC78XX) of proper rating can be used regulation and smooth output. But voltage regulator IC itself consume some current, and reduce the deliverable current.

Here the schematic diagram voltage converter circuit: 12VDC to 18VDC or 24VDC: This voltage doubler circuit will convert 12-V power supply to become a 24VDC and 18VDC. Use this circuit with almost any PNP or NPN power transistor. Component Parts list: U1: NE 555 timer. C1 and C2: 50μF/25V Q1: TIP 29, TIP120, 2N4922, TIP61, TIP110, or 2N4921. Q2: TIP30, TIP125, 2N4919, TIP62, TIP115, or 2N4918.