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3 Solid-State Single IC 220V Adjustable Power Supply Circuits

Last Updated on June 18, 2022 by Swagatam 14 Comments

These AC to DC power supplies use a single chip to convert mains 220 V or 120 V input AC into 12 V or 5 V DC without depending on […]

Filed Under: LM317/LM338, Power Supply Circuits, Transformerless Power Supply

1.5V Power Supply Circuit for Wall Clock

Last Updated on May 17, 2019 by Swagatam 97 Comments

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 […]



Filed Under: Transformerless Power Supply

LM317 Variable Switch Mode Power Supply (SMPS)

Last Updated on May 21, 2023 by Swagatam 97 Comments

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 […]

Filed Under: Power Supply Circuits, SMPS

0-60V LM317HV Variable Power Supply Circuit

Last Updated on August 14, 2021 by Swagatam 81 Comments

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 […]

Filed Under: LM317/LM338, Power Supply Circuits

How to Design an Uninterruptible Power Supply (UPS) Circuit

Last Updated on August 4, 2020 by Swagatam 51 Comments

In this brief tutorial we learn how to design a customized UPS circuit at home using ordinary components such as a few NAND ICs and a some relays. What is […]

Filed Under: Inverter Circuits

Selecting Power Supply for Car Amplifiers

Last Updated on May 5, 2022 by Swagatam 41 Comments

The following discussion informs us regarding how to select the right power supply for a car amplifier which needs to be operated at home. The questions were raised by Mr. […]

Filed Under: Audio and Amplifier Projects



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