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Zero Crossing Transformerless Power Supply Circuit

The post explains the importance of a zero crossing detection in capacitive transformerless power supplies in order to make it completely safe from the mains switch ON inrush surge currents. The idea was proposed by Mr. Francis. Technical Specifications I have been reading about the transformer less power supply articles on your site with great … Read moreZero Crossing Transformerless Power Supply Circuit

Switching Transformerless Power Supply using IC 555

A simple yet smart solution is implemented here using IC 555 in its monostable mode to control in rush surge in a  transfomerless power supply via a zero crossing switching circuit concept, wherein the input power from the mains is allowed to enter the circuit only during the zero crossings of the AC signal, thereby eliminating the … Read moreSwitching Transformerless Power Supply using IC 555

0-300V Adjustable Transformerless MOSFET Power Supply Circuit

The post explains a simple mosfet controlled transformerless zero to 300 volts variable voltage and current power supply circuit which can be used for many different applications.To protect against my higher voltage research projects from shooting up in smoke permanently, I developed an easy circuit which is able to render a variable voltage supply of … Read more0-300V Adjustable Transformerless MOSFET Power Supply Circuit

MJE13005 Compact 220V Power Supply Circuit

The following article presents a very simple low current mains operated transformerless power circuit using an inexpensive MJE13005 transistor and few other passive electronic components. As can be witnessed in the given circuit diagram, the design is extremely straightforward. How it Works Transistor T1, which is a high voltage NPN transistor MJE13005 forms the main active component … Read moreMJE13005 Compact 220V Power Supply Circuit

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 problem of deriving high current from capacitive power supplies which earlier seemed a difficult proposition. I assume I am the first person to have invented … Read moreHigh Current Transformerless Power Supply Circuit

Making a 220v to 110V Transformerless Converter Circuit

The presented circuit has been taken from an old elektor electronic magazine which describes a neat little circuit for converting 220V mains input to 110V AC. Let’s learn more about the circuit details. Circuit Operation The shown circuit diagram of a transformerless 220v to 110v converter utilizes a triac and a thyristor arrangement for making the circuit successfully work … Read moreMaking a 220v to 110V Transformerless Converter Circuit

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