NiMh battery charger using CD4541
The circuit is capable of supplying either a trickle (50 mA) or high-current (1-A) charge. You can select either charging method or an automatic mode that will first trickle charge a battery if it is particularly low before switching to
high-current charging.
Read More source: http://www.circuitsuggest.com/battery-charger.html
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Categories: Battery charger Tags: CD4541, high current battery charger, NiMh battery charger
Fast charge Controller with MAX712 – MAX713
The MAX712 and MAX713 are nickel cadmium (Ni-Cd) battery fast charge controllers which will fast charge batteries from a DC source at least 1V higher than the maximum battery voltage. 1 to 16 series cells can be charged at rates up to 4C. A voltage-slope detecting analogue-to-digital converter, timer, and temperature window comparator determine charge completion. The MAX712 or 713 are powered by the DC source via an on-clip +5V shunt regulator, and draw a maximum of 5uA from the battery when not charging. A low-side current-sense resistor allows the battery charge current to be regulated while still supplying the power to the battery’s load.
Source: http://www.next.gr/inside-circuits/Fast-charge-Controller-with-MAX712-MAX713-l5869.html
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USB Powered AA NiMH – NiCd Battery Charger by LM393
The charger in this project is designed to charge two AA NiMH or NiCd cells of any capacity (as long as they are the same) at about 470mA. It will charge 700mAh NiCds in about 1.5 hours, 1500mAh NiMHs in about 3.5 hours, and 2500mAh NiMHs in about 5.5 hours. The charger incorporates an automatic charge cut-off circuit based on cell temperature, and the cells can be left in the charger indefinitely after cut-off.
Source:http://www.stefanv.com/electronics/usb_charger.html
http://electronics-diy.com/
Thank you.
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Categories: Battery charger Tags: ni mh battery, nicad battery charger, NiMh battery charger, USB
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