Current Limiter circuit for a Power Supply using a transistor and a resistor.

If the load current exceeds its maximum, an over current protection is needed

Transistorized Voltage Regulator Why use a transistorized voltage regulator? If we use a half or a full-wave rectifier we can convert an AC voltage in a DC one. This converted voltage is unregulated, because the output voltage is not constant and can change due to variations of the load value. To reduce these variations we connect […]

How does a Zener diode voltage regulator work?

Design method. Determination of the voltage, power of the zener diode and of the limiting resistor Rs

Transistor – Zener diode Voltage regulator circuit

This circuit delivers an output voltage established by the voltage of the zener diode less 0.7 volts. The 0.7 volts is the average voltage drop between the base and the emitter of a transistor. (Vbe)