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 […]
Power Supply Circuits
How an Autotransformer Works – How to Make
An autotransformer is an electrical transformer which consists of only a single, continuous, non-isolated winding, with tapped terminals across various points of the winding. The winding section between the taps that correspond to the mains AC is applied with the mains AC supply, while the remaining taps are used for getting the desired output voltages, […]
How to Modify a Transformer
Commonly, the perfect transformer might not be readily accessible for purchase, or if it is available, it can be costly. Nonetheless, there is a possibility of modifying the transformer’s secondary winding, especially when producing small voltage and current outputs. This approach can provide a highly cost-effective solution for creating a customized power supply. Transformer Power […]
How Buck-Boost Circuits Work
We all have heard a lot about buck and boost circuits and know that basically these circuits are used in SMPS designs for stepping up or stepping down a given voltage at the input. The interesting thing about this technology is that it allows the above functions with negligible heat generation which results in a […]
SMPS Halogen Lamp Transformer Circuit
One of the best substitutes for traditional light transformer for halogen bulbs is the electronic halogen transformer. It can also be used with non-halogen bulbs and any other form of resistive loads that does not run on RF current. Written and Submitted By: Dhrubajyoti Biswas Halogen Lamp Working Principle The electronic halogen lamp transformer works […]
How Switch Mode Power Supply (SMPS) Circuits Work
SMPS is the acronym of the word Switch Mode Power Supply. The name clearly suggests that the concept has something or entirely to do with pulses or switching of the employed devices. I have explained how SMPS adapters work for converting mains voltage to a lower DC voltage. Advantage of SMPS Topology In SMPS adapters […]