12V to 9V DC Converter Circuit Diagram (PCB)
This 12V to 9V DC converter is very useful for powering 9V DC devices in a car that uses 12V DC battery. The maximum current consumption allowed by this circuit is 0.8 amps.
Transformerless Power Supply Circuit We will use a zener diode among other elements to acheive the Transformerless Power Supply circuit. This means that our power supply will give a limited range current value (it will be a maximum and a minimum posible current that the power supply circuit can deliver). This power suply must be permanently connected to the circuit as a whole […]
Transistorized Voltage Regulator Using a half and a full-wave rectifier we can convert an AC voltage in a DC one. This converted voltage is unregulated, because the output DC voltage does not remain constant. The output voltage of a power supply may vary due to changes in the load value. To reduce these variations we connect […]
Voltage regulator classification a) Linear voltage regulators Linear voltage regulators control the output voltage, continuously adjusting the voltage drop in a power transistor that is connected in series between the unregulated input and the load. Since an electric current must flow through the transistor all the time, the transistor have to operate in its linear region. Although they are simpler […]