I'd like some comments on the item below. Any comments are welcome and appreciated.
I built a very simple battery charger using an lm317, resister and diode. The input is a solar panel that typically is outputting about 15+/- volts and 100 to 200 ma. The battery charger is connected to 4 nimh AA battiers. The feed current into the battiers is about 54 ma.
Question 1: Is this circuit a legitimate way to keep or put a charge on the battiers?
Question 2: If I want to charge 6 AA's, will the 54 ma do it, but just take more time??
Question 3 Voltage level from the solar panel important?
The goal for all of this, at this point, is to use both battiers and/or solar to power my little 2 watt stereo amp that is connected to my mp3 music player. I use it outdoors while doing yard work. Right now the amplifier is powered by the solar panel using a 9 volt regulator similar to the lm317. The mp3 player has a separate, independent battery that I want to solar charge eventually.
Battiers appear to be almost mysterious when it come to charging them, but I want to use solar and I need to keep it real simple or my brain may strip a gear. I really don't know doodley about electronics but enjoy fooling around with it like this. Thank You.
I built a very simple battery charger using an lm317, resister and diode. The input is a solar panel that typically is outputting about 15+/- volts and 100 to 200 ma. The battery charger is connected to 4 nimh AA battiers. The feed current into the battiers is about 54 ma.
Question 1: Is this circuit a legitimate way to keep or put a charge on the battiers?
Question 2: If I want to charge 6 AA's, will the 54 ma do it, but just take more time??
Question 3 Voltage level from the solar panel important?
The goal for all of this, at this point, is to use both battiers and/or solar to power my little 2 watt stereo amp that is connected to my mp3 music player. I use it outdoors while doing yard work. Right now the amplifier is powered by the solar panel using a 9 volt regulator similar to the lm317. The mp3 player has a separate, independent battery that I want to solar charge eventually.
Battiers appear to be almost mysterious when it come to charging them, but I want to use solar and I need to keep it real simple or my brain may strip a gear. I really don't know doodley about electronics but enjoy fooling around with it like this. Thank You.