May 2015

Motivation: Non-availability of 15 V @ 0.36 A charging adapter in the market for my obsolete trimmer

Objective: To make my own Adjustable (1.2 – 18 V @ 1.5A) Linear Regulated Power Supply using IC LM317T

Details: The design was made using Proteus and tested on the computer before building the same in real life. I used a step-down transformer and a full bridge diode rectifier with a capacitor (2200 uF) filter to supply DC to IC LM317T. Adjustable output was then fed to the trimmer with help of wires. Through this, I came to know and design simple circuits using CAD (Computer-Aided Design) tools like Proteus and Orcad. The project was finally made and I got my trimmer working again.

The circuit diagram was first tested in simulation and once the results were satisfactory, it was implemented on the PCB.