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Old 12-30-2008, 08:52 PM #1
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Default How Can I......?

Get 9 volts from a host that only accepts 3 AAA batteries without going and killing a laser module designed to take 9 volts?

3.6 x 3 = 10.8

So I would be 1.8v over if I used 3 x 3.6v AAA batteries.


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Old 12-30-2008, 09:22 PM #2
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Default Re: How Can I......?

It depends a bit on the driver circuit , you can put as much as 38v into an LM317 circuit without raising the output, (the excess voltage gets turned into heat). I am using a rkcstr with 3 10440 3.6v batteries, driving an 803T LD with no problems.

Most drivers we use are constant current, so as long as you keep the voltage between the upper and lower limits for the regulator you should be OK.

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Old 12-30-2008, 11:58 PM #3
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Default Re: How Can I......?

Awsome. So its like ddls driver I first built. I just really needed the minimum voltage in order to power it.

I think the rkcstr is the one I will be working with. I am not sure.

So I guess now I need to locate the batteries I want.
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