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You are here: Home / Archives for LM317/LM338

18650 2600mAh Battery Datasheet and Working

Last Updated on March 27, 2021 by Swagatam 33 Comments

In this article we will try to understand the main specifications and datasheet of the Li-Ion cell 18650 2600 mAh, which is one of the most popular Li-ion batteries, and […]

Filed Under: 741 IC Circuits, Datasheets, Electronic Components, LM317/LM338

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

Last Updated on June 18, 2022 by Swagatam 12 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

0-60V LM317HV Variable Power Supply Circuit

Last Updated on August 14, 2021 by Swagatam 57 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

LM317 with Outboard Current Boost Circuit

Last Updated on June 22, 2022 by Swagatam 138 Comments

The popular LM317 voltage regulator IC is designed to deliver not more than 1.5 amps, however by adding an outboard current boost transistor to the circuit it becomes possible to […]

Filed Under: LM317/LM338, Power Supply Circuits

Designing a Customized Battery Charger Circuit

Last Updated on October 31, 2020 by Swagatam 125 Comments

I have designed and published a variety of battery charger circuits in this website, however the readers often get confused while selecting the right battery charger circuit for their individual […]

Filed Under: Battery Chargers, LM317/LM338

Adjustable 3V, 5V, 6V, 9V,12V,15V Dual Power Supply Circuit

Last Updated on June 25, 2021 by Swagatam 32 Comments

The purpose of this paper is to detail a variable dual lab power supply circuit which has an adjustable range from 3V, 5V, 6V, 9V, 12V, and 15V or even […]

Filed Under: LM317/LM338, Power Supply Circuits

LED Strip Light Dimmer Controller Circuit

Last Updated on April 18, 2022 by Swagatam 46 Comments

The post explains a simple IC 555 based PWM controller circuit which may be used for controlling the intensity of a specified LED bank or an 12V LED strip light. […]

Filed Under: 555 IC Circuits, DIY LED Projects, LM317/LM338

PWM Solar Battery Charger Circuit

Last Updated on December 23, 2021 by Swagatam 118 Comments

This simple, enhanced, 5V zero drop PWM solar battery charger circuit can be used in conjunction with any solar panel for charging cellphones or cell phone batteries in multiple numbers […]

Filed Under: Battery Chargers, LM317/LM338, Solar Controllers, TL494 IC

Charging a Cellphone battery with a Laptop Battery

Last Updated on August 7, 2019 by Swagatam 5 Comments

The post presents a simple circuit that may be used for charging a cellphone battery with a laptop battery. The idea was requested by Mr. Gyashuddin. Recharging Cellphone Battery with […]

Filed Under: Battery Chargers, Inverter Circuits, LM317/LM338, Transmitter Circuits

Lithium Polymer (Lipo) Battery Charger Circuit

Last Updated on August 7, 2019 by Swagatam 71 Comments

The post explains a simple lithium polymer (Lipo )battery with over charge cut off feature. The idea was requested by Mr. Arun Prashan. Charging  a Single Lipo Cell with CC […]

Filed Under: Battery Chargers, LM317/LM338



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