drabina
Head-Fier
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- Jan 27, 2011
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Anybody have a tested schematic for charging 9V battery?
Thanks.
Thanks.
R11 sets the charge current
The PIMETA v2 includes a simpler LM317-based trickle charger, suitable for "9V" NiMH batteries. Schematic link.
There's a whole section in the docs explaining it.
An LM317, one or two diodes, and a resistor. Done.
where would you find an LM317?
I wanted to get it from mouser but they don't seem to carry it...
I've seen this schematic on the net somewhere before. It is straightforward, the only thing
nobody seems to be able to come up with is the formula for calculating current.
Even the datasheet of the LM317 doesn't give a clue...
...and applying ohms law you'll be able to figure the rest out yourself.
Thanks for replies. The battery I am going to be using is Rayovac 9V 200mA NiMH rechargeable battery.
Any well-stocked Radio Shack.
The LM317 is one of the most common ICs around. You can probably find them for sale in Outer Mongolia.
Seriously??
I get 19 results, just in TO-220 type packaging, or over a hundred if you are willing to look at other packages. The TO-92 style is suitable for DIYing a 9V trickle charger.
The PIMETA v2 parts list even gives you a couple of Mouser part numbers.
How hard did you look?