In the following post I have explained two straightforward dummy load circuits: the first one can be used for testing high current power supplies, and the second design can be used for testing large power amplifiers. Suppose you have a 10 amp power supply and you want to confirm the 10 amp output through some […]
Power Supply Circuits
How to Use LM317 for Making a Variable Power Supply Circuit
In this post I will elaborately explain how to build a simple LM317 based adjustable power supply circuit using minimum number of external components. As the name suggests a variable power supply circuit provides the user with a range of linearly varying output voltages through a manually controlled potentiometer rotation. A LM317 is a versatile […]
High Current Adjustable Switching Power Supply Circuit using L296 IC
The L296 is a monolithic power switching regulator IC, incorporating an adjustable output voltage, current limiting, and thermal shutdown. Due to these features, this IC has become a favorite option for a many different applications such as bench power supplies, battery chargers, and motor controllers. The IC L296 will be used in this circuit to […]
How to Design a Bench Power Supply Circuit
In this post I have explained how an effective and efficient, yet very cheap, and stabilized bench power supply can be designed by any electronic hobbyist for safely testing all types electronic projects and prototypes. The main features that a bench power supply must have are: General Description The majority of the power supply designs […]
Regulated, High Current Power Supply Circuit
The circuit I have explained below can be used for applications that require stringent voltage regulations and ripple rejection criteria. The transistor pair are configured such that all residual ripple factor are perfectly rectified. Circuit Operation The circuit below shows a simple way of acquiring a perfectly regulated and stabilized high current DC voltage output using ordinary transistors. The circuit […]
High Voltage Constant Current Source Circuit
The presented circuit offers an adjustable constant current source capable of reaching up to 60mA, operating at voltages as high as 350V. Circuit Description The input stage, consisting of resistor R1 and zener diode ZD1, delivers 8V to the regulator (a 7805), maintaining this voltage relative to its reference line. This voltage level ensures sufficient […]