Current Limiter for Voltage Regulator using Transistor

If the current required in the load exceeds the maximum allowed, the voltage regulator can be damaged. To avoid this problem it is necessary to have over current protection.

The half-wave rectifier rectification process.

Polarization of semiconductor diode in the forward and in the reverse direction. Input and output waveforms

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)

How to make 12V 1A power supply using zener diode and transistors?

This 12V 1A power supply using zener diode and transistors allows us to obtain an output of approximately 11.4 volts with a very small percentage variation for a wide variety of loads.

12 VDC to -12 VDC converter circuit with a 555 IC.

This 12 VDC to -12 VDC converter circuit gives -12VDC (negative 12 volts) from a power source of + 12VDC (positive 12 volts), with very few components.

This 9VDC source using zener and transistor can be used to power circuits or electronic devices that would normally use a 9 volt battery, saving us the cost of the battery while being used at home.