Bench Power Supply Schematic

What is a variable power supply.

Bench power supply schematic. The circuit of a simple variable voltage bench power supply referred here shows us how to build one such unit quickly using common. With the variable supply feature it is easy to control and deliver voltage and current to the load. The post details how to design and build a good work bench power supply circuit right from the basic design to the reasonably sophisticated power supply having extended features.

Commercial high voltage power supplies are few and far between and they cost a fortune. At present i have only one high power supply a 150 watt 13 2v unit for standard mobile use auto marine etc. The diagram below shows a partial schematic of a 450 watt atx power supply.

Transistor variable power supply 1a 0 30v. It will keep a stable voltage when it has any load. It would be difficult and expensive to design a supply to handle all these situations.

But it still has the same characteristics as a fixed regulated power supply. In this instructable i will show you how to make a variable lab bench power supply with a limited budget it is a great diy project for beginners as well as any one interested in electronics. However making one such power supply within minutes using a handful of components might look difficult.

Note that most schematics circulating on the internet depict old style psu with bipolar transistors and without pfc. Whether it s an electronic noob or an expert engineer. Its construction is typical for a modern computer psu with mosfet switches and active power factor correction pfc.

For the occasional circuits that i build under the high power heading i construct a supply just for that device and its particular needs. Simply said it is a power supply that can adjust the output voltage or current. Build a bench top lab power supply that is capable of delivering 0 to 50 volts and 0 to 5 amp or a to the load.