I need 3.2VDC to power something, I was told i can just use 2 AA batterys, is this right? Also, I forgot, is the red wire positive or negative. I have a red and a black wire. Thanks
2007-01-07 05:44:04 · 6 answers · asked by rindotheraven 2 in Science & Mathematics ➔ Engineering
You need to know your voltage range. For example 3.2 +/- 10% because 2 AA batteries might have 3.2 Volts unloaded or for a very short time but will quickly drop to 3.0 Volts during usage. Normally Red is Positive(+) and Black is Negative(-)
2007-01-07 05:48:27 · answer #1 · answered by rscanner 6 · 1⤊ 0⤋
In addition to what rscanner said, you also need to know the current requirement. More than a few 10s of mA and the voltage droop of AA batteries will cause the terminal voltage to drop well below 3.2. Obviously the current also has a major effect on the battery life, too.
2007-01-07 12:43:14 · answer #2 · answered by AnswerMan 4 · 0⤊ 0⤋
Two aa battery's will work most battery's are 1.5 volts DC
The difference between your AA, C, D size battery's is the amount of current output. They are all 1.5 volts DC.
2007-01-07 05:53:24 · answer #3 · answered by spinnoff 2 · 1⤊ 0⤋
Two AA cells will supply less than 3 v (about 2.9 when fresh). You may be able to use this, if your device can run on that amount. Some will, some won't.
2007-01-07 05:56:45 · answer #4 · answered by Anonymous · 0⤊ 1⤋
take a 9 volt battery and a variable resistor and adjust it to whatever you like. variable resistors are available at radio shack , once you find the resistance needed .(for mass producing etc...) you can just inline proper resistance. i will check that for ya? !!! b.
2007-01-07 21:55:44 · answer #5 · answered by brian e 1 · 0⤊ 0⤋
Use a switch mode power supply and a properly amp rated resistor.
2007-01-07 13:23:04 · answer #6 · answered by Chi Guy 5 · 0⤊ 0⤋