Digital Benchtop Power Supply Schematic

Every electronics laboratory needs a powerful regulated bench supply.

Digital benchtop power supply schematic.

Presented here is a circuit for 30v 10a variable bench power supply that offers variable voltage and current adjustment. It s typically used by electrical engineers circuit designers and other professionals in similar lines of work. The power supply unit uses switching regulators to maintain a constant supply with good regulation and short circuit protection cause the unit to shutdown and be re powered immediately if something goes wrong. An old pc power supply unit makes an excellent and cheap bench top power supply for the electronics constructor.

I have had this circuit in use now for over 20 years and has never let me down and is one of the most. The main objective of the project is to learn how a linear power supply unit works in the beginning to explain the working principle of a linear power supply i have taken an example of lm 317 based power supply for making the final power supply i purchased a power supply kit from banggood and assembled it. I often end up with the power clips shorting out on the bench and with no problems. Power supply is based around a lm723 voltage regulator chip and has current limiting.

They range from linear purely analogue supplies with only voltage regulation to switching supplies.