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1.5V Power Supply Circuit for Wall Clock

The post presents a simple transformerless 1.5V DC power supply circuit which can be used for powering wall clocks directly from mains, and also keep a stand by back-up cell fully charged for enabling an uninterrupted operation of the clock even during mains failures. The idea was requested by Cheekin Warning: This circuit is not … Read more1.5V Power Supply Circuit for Wall Clock

LM317 Variable Switch Mode Power Supply (SMPS)

So far in this website we have studied LM317 based linear power supply circuits, here we will learn how an LM317 can be executed as a variable switch mode power or SMPS with zero loss. LM317 as Linear Regulator We all know that an LM317 IC is internally designed to work as a linear voltage … Read moreLM317 Variable Switch Mode Power Supply (SMPS)

0-60V LM317HV Variable Power Supply Circuit

The high voltage LM317HV series of ICs will allow to go beyond the traditional voltage limits of an LM317 IC and enable controlling supplies that may be as high as 60V. 0-60V Regulation with a Single IC LM317 Therefore now you can build a universal 0-60V regulated power supply circuit loaded with all the essential … Read more0-60V LM317HV Variable Power Supply Circuit

SCR Shunt Circuit for Protecting LED Drivers

The post presents an effective method for protecting capacitive LED driver circuits through an SCR shunt regulator circuit and explains how it can prevent filter capacitors from blowing of and LEDs from getting destroyed. The remedy was requested by Mr. Max Payne. Protecting High Watt LEDs Please suggest regarding 3W, 5W LED bulb circuit design fault. … Read moreSCR Shunt Circuit for Protecting LED Drivers

Mini Welding Machine Circuit for Small Welding Jobs

A small transformerless welding machine circuit can be built using a few high voltage, high value capacitors and a rectifier diode, the following article explains more on it. The idea was requested by Mr. Tun. In one of my earlier posts we came across a full fledged 100 amp SMPS welding inverter circuit for working … Read moreMini Welding Machine Circuit for Small Welding Jobs

Illuminating an LED using Wireless Power Transmission

In this post we learn how to illuminate an LED using wireless power transmission.   Wireless Power Technology Wireless power is an emerging technology in this present world. But the stunning fact is that it’s a century old concept. This concept was emerged by Nikola Tesla. Charging batteries through wireless power is used in many … Read moreIlluminating an LED using Wireless Power Transmission

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