This circuit is power supply circuit, again the circuit that have the merit is if we want dc voltage 12V but , we have 6 volt only the circuit can modify DC voltage 6 Volt be 12VDC get.
The principle works of the circuit is Q1, Q2, R1, R2, R3, R4, R5, D1, C1 and C2 [...]
This is DC to DC converter can provide up to 24V from a 12V volt DC. It can be used to run radios, small lights, relays, horns and other 24V accessories from a 12V vehicle with a maximum draw of about 800mA. It can be used to charge one 12V battery from another, or step [...]
The charger consists of two stages: The first is a capacitive voltage doubler, which uses a 555 timer IC driving a pair of transistors
connected as emitter followers, which in turn drive the voltage doubler proper. The doubler has power resistors built in, which limit the charging current.
The second stage is a voltage regulator, using a [...]
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