Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


Unclassified Battery Charger Circuits, page 3
Battery Charges      Alkaline       Lead Acid       
Lithium     
Nickel

 Last Updated on: Thursday, November 30, 2017 01:57 PM

Got Designs?
Please eMail
if you want me to link to and/or post your original design Thanks.

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
Broken Charger-Connection Alert -  Detects if a device is not properly connected to its supply.  Suitable for battery chargers, portable appliance supplies etc. (added 3/050
Buck converter charger also provides system power -  05/22/97 EDN-Design Ideas  Switching Regulator provides  charge voltage setpoint with Current regulation, and second Switching Regulator provides5V System Power -Many systems require long-time operation during periods of power loss. Often, a gel or wet-cell lead-acid battery is  best choice because of high capacity and relatively low cost. The battery charges.... [Design Idea by Robert Hanrahan, National Semiconductor, Woodcliff Lake, NJ]
Build a Simple Rechargeable CMOS Battery -  Occasionally we come across a computer motherboard that seems to eat those CR2032 batteries every 4 to 5 months.  This is particularly frustrating because the computer works perfectly once booted but all the important BIOS settings are lost when the CR2032 battery fails.  This is very irritating if the affected computer will not boot up with the default BIOS settings. I recently had a computer motherboard with this same irritating phenomenon. A test revealed that the current drain... [Radio Amateur Society of Norwich By N1HFX]

Build Your Own Solar Battery Charger -  For this project I used 12 cells but you really only need 6. So if you are on a budget use 6 but if you want a fast charger use 12. Next lay out all your cells on your window to make sure everything is going to fit. I used the "deeper" side of the window so that there would be more room...
Candle Power -  A single lit candle in conjunction with an inexpensive thermopile voltage generator provides enough power to charge a small battery when used with a small low voltage DC to DC converter. Posted …. [Hobby Corner Circuit by Dave Johnson]
Do It Yourself Portable Cell Phone Charger -  It seems that as cell phones become more sophisticated, their operating times become shorter and shorter.  If you are on the go all the time and have difficultly finding AC or DC outlets to charge your phone, you might consider this simple scheme.... [Designed by David A. Johnson]
                 Next Unclassified Battery chargers     Previous

Battery Charges      Alkaline       Lead Acid        Lithium      Nickel


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - November, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.