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Power

LM324 Variable Power Supply Circuit

Last Updated on July 6, 2019 by Swagatam 206 Comments

power supply

The presented universal power supply circuit can be used just for anything, you can use it as a solar battery charger, bench power supply, mains battery charger circuit, or for any desired application regardless of the voltage and current range, which are extremely flexible and fully adjustable. Main Features: The mains features of this power […]

Filed Under: Power Supply Circuits Tagged With: LM324, Power, Supply, Variable

60W, 120W, 170W, 300W Power Amplifier Circuit

Last Updated on May 15, 2026 by Swagatam 38 Comments

IMG 0021 2

The post presents an in-depth discussion regarding the construction details of a universal high power amplifier which can be modified or adjusted to suit any range within 60 watt, 120 watt, 170 watt or even 300 watt power output (RMS). The Design The circuit diagram in Fig. 2 tells about the highest power capability form […]

Filed Under: Audio and Amplifier Projects Tagged With: 120W, 170W, 300W, 60W, Amplifier, Power

What’s Ripple Current in Power Supplies

Last Updated on January 8, 2024 by Swagatam 1 Comment

ripple

In this post I have explained regarding what’s ripple current in power supply circuits, what causes it and how it can be reduced or eliminated using smoothing capacitor. What’s Ripple in Power Supply Circuits In all AC to DC power supplies the DC output is acquired by rectifying the AC input power and filtering through […]

Filed Under: Power Supply Circuits Tagged With: Current, Power, Ripple, Supplies

Digital Power Meter for Reading Home Wattage Consumption

Last Updated on June 8, 2026 by Swagatam 20 Comments

power2Bmeter

In this article I have explained a simple digital power meter circuit which can be installed in homes for getting an instant reading of the wattage being consumed by the attached appliances or the loads. The idea was requested by Mr. Nitin. Technical Specifications I m going through a problem. I want to know a […]

Filed Under: Meters and Testers Tagged With: Digital, Home, Meter, Power, Reading, Wattage

5 Simple Power Bank Circuits for Mobile Phones

Last Updated on May 17, 2026 by Swagatam 174 Comments

powerbank

In this article I have explained a 5 assorted power bank circuits using 1.5V cell and 3.7V Li-ion cell which can be built by any individual for their personal emergency cellphone charging functionality. The idea was requested by Mr. Irfan What is a Power Bank Power bank is a battery pack which is used to […]

Filed Under: Battery Charger Circuits Tagged With: Bank, Circuits, Mobile, Phones, Power, Simple

12V LED Backpack Power Supply Circuit

Last Updated on January 18, 2025 by Swagatam 9 Comments

steam2Bpunk

In this article I have explained to make a simple 12v LED backpack power supply circuit for powering a 36watt LED lamp, which includes appropriately wired integrated sockets for enabling the attachment of external devices such as a regulated battery charger, ammeter, voltmeter etc. The idea was requested by Mr.  Kevin Bates Backpack LED Charger/Driver […]

Filed Under: Power Supply Circuits Tagged With: 12V, Backpack, LED, Power, Supply

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