# Power Supply Circuit Diagram Using 7805 And 7812

By | September 13, 2017

A power supply circuit is one of the most important components in any electronic device. It ensures that all the essential components of the device receive an adequate amount of voltage and current. In many cases, power regulation is needed to ensure that these components are not damaged due to fluctuations in input voltage or current. A common solution is to use a combination of a 7805 and 7812 ICs for regulating the power supply.

The 7805 and 7812 ICs are two of the most popular voltage regulators used for power supply. The 7805 is a 5V regulator that offers fixed output voltage and current, while the 7812 is a 12V regulator that provides additional flexibility with adjustable output voltage and current. Both ICs are designed to protect circuits from overvoltage, undervoltage, and short-circuiting.

When combined, the 7805 and 7812 can be used to regulate the input voltage and current of an electronic circuit, ensuring that components such as transistors, capacitors, and other components are not damaged by voltage spikes or drops.

To build a power supply circuit using these two ICs, connect the 7805 to the positive lead of the power source, and the 7812 to the negative lead. Then, connect the 7805’s output to the negative lead of the 7812, and the 7812’s output to the positive lead of the 7805. Finally, connect the common ground of both ICs to the ground of the power source.

This simple circuit is capable of providing a stable and safe power source to an electronic circuit, while protecting it from overvoltage, undervoltage, and short-circuiting. Additionally, the adjustable voltage and current levels offered by the 7812 can be used to meet the power specifications of various components in the circuit.

Whether you’re a hobbyist or an experienced electronics engineer, understanding how to properly use a power supply circuit is essential to designing safe and reliable electronic devices. When combined with the versatile 7805 and 7812 ICs, designing a regulated power source becomes much easier.

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