Text only | Text with Images

Dangerous Prototypes

In development => Project logs => Topic started by: arupbsk on September 28, 2011, 07:53:33 pm

Title: Simple DIY Li-ion charger circuit
Post by: arupbsk on September 28, 2011, 07:53:33 pm
Hi,
I've been using this circuit to charge my kodak camera's li-ion battery since a few months, and it's result is nice.
My design has 3 leds, one to indicate charging(blink), one to show full battery, and one to indicate battery presence.
Actually it's a composite circuit idea which I made by mixing up a few li-ion battery charger circuits.
The key is a LM358 op-amp IC, S8550 PNP transistor, and a bunch of resistors.
LTC4054 and other dedicated li-ion charger ICs are there, but if it's going to be a DIY project's part, then who wants to miss the less IC and more resistor, capacitor's fun? Surely I don't. You can give 5V supply from wall adapter, or from USB port.

Link to my blog entry: http://www.circuitsdiy.com/simple-lm358 ... n-charger/ (http://www.circuitsdiy.com/simple-lm358-op-amp-based-usb-li-ion-charger/)

Try this, I'm sure you won't be disappointed.
Title: Re: Simple DIY Li-ion charger circuit
Post by: arupbsk on November 13, 2012, 04:16:11 pm
Update: http://circuitsdiy.com/projects/usb-li-ion-charger (http://circuitsdiy.com/projects/usb-li-ion-charger)
Video demo(ignore V/A sync problem): https://www.youtube.com/watch?v=wJ_uI1uWbes (https://www.youtube.com/watch?v=wJ_uI1uWbes)
Text only | Text with Images

( ! ) Fatal error: Uncaught exception 'Elk_Exception' with message 'Please try again. If you come back to this error screen, report the error to an administrator.' in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
( ! ) Elk_Exception: Please try again. If you come back to this error screen, report the error to an administrator. in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
Call Stack
#TimeMemoryFunctionLocation
10.00992053024session_write_close ( )...(null):0
20.01022184616ElkArte\sources\subs\SessionHandler\DatabaseHandler->write( )...(null):0
30.01032185392Database_MySQL->query( ).../DatabaseHandler.php:119
40.05342324128Database_MySQL->error( ).../Db-mysql.class.php:273