Power Supply Unit With Overvoltage Protection

An overvoltage protection of power supply unit is shown in the figure with a regulated 5V output.

Car Voltage Regulator Circuit Using LM317

The car cigarette lighter socket does not only light cigarettes, but can be utilized as an electrical channel for powering tools to work on the car such as laptops and other electronic devices. The following circuit diagram shows a way of powering a two-way mobile radio using the LM317T voltage regulator.

Fuse Condition Monitor with LED Indicator

In the field of electrical and electronics engineering, a fuse (short for fusible link) is considered as a safety tool to protect any electrical circuit from the result of overload currents.

Uninterruptible Power Supply (UPS): Basic Circuit Diagram

The circuit drawn pertains to a regular industrial UPS (Uninterruptible Power Supply), which shows how the batteries take control during an outage in electrical supply or variation beyond the normal limits of the voltage line, without disruption on the operation providing a steady regulated output (5 Volts by LM7805) and an unregulated supply (12 Volts).

Increasing 78xx Voltage Regulator Current

Shown in the figure is an IC voltage regulator (also known as stabilizer), designed to increase its current output with the use of an outboard pass transistor.

LM7812 High Current Power Supply by TIP2955 Pass Transistors

This LM7812 power supply can deliver up to 30A to the load by the help of the TIP2955 pass transistors. Each transistor can handle up to 5A and six of them result an total output current of 30A