The following article presents a very simple low current 220 V mains operated transformerless power supply circuit using an inexpensive MJE13005 transistor and few other passive electronic components. As can be witnessed […]
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Surge Protected Cheap Transformerless Hi-Watt LED Driver Circuit
The increased number of complaints from the readers regarding burning LEDs associated with my earlier posted transformerless 1 watt LED driver circuit, compelled me to solve the issue once for […]
High Current Transformerless Power Supply Circuit
The simple configuration of a transformerless power supply circuit presented below is able to provide high current at any assigned fixed voltage level. The idea seems to have solved the […]
Transformerless UPS Circuit for Computers (CPU)
In this post we discuss how to build a simple UPS circuit for backing up computers or PCs during sudden power failures or brownouts. Introduction Normally when we talk about […]
Transformerless Automatic Night Lamp Circuit
This transformerless solid-state automatic night lamp operates without using bulky transformer, and automatically switches ON some LEDs during night, and switches them OFF during day. In this post we learn […]
4 Simple Transformerless Power Supply Circuits Explained
In this post we discuss 4 easy to build, compact simple transformerless power supply circuits. All the circuits presented here are built using capacitive reactance theory for stepping down the […]