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11-24-2010, 01:19 AM #1
 Class 1 Laser Join Date: Mar 2009 Location: New Jersey, United States of America Posts: 74 Rep Power: 10
Clickey
Class 1 Laser

Join Date: Mar 2009
Location: New Jersey, United States of America
Posts: 74
Rep Power: 10
Please delete this post (I posted in wrong section accidentally)

Accidentally posted on wrong section. I meant for this to be under tutorials help and repairs.

So how can I delete this post?

Last edited by Clickey; 11-24-2010 at 01:52 AM.

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11-24-2010, 01:31 AM #2
 Class 3R Laser Join Date: Nov 2010 Location: Portugal Posts: 2,470 Rep Power: 84
anselm
Class 3R Laser

Join Date: Nov 2010
Location: Portugal
Posts: 2,470
Rep Power: 84
Re: Homemade Laser Diode driver (DDL)

You might wanna try and open up your DMM, see if it has screws.
There might be a 200ma (or something) fuse which you blew trying to measure
more than that. Replace.

You can still read current by using the voltmeter. Measure the voltage across
a known resistor in series with the circuit, there is a formula, but
I think if R = 1 Ohm than the mv you measure = the ma that flow.
But don't quote me on that.

Connection between points 2 and 3 on your switch seems unnecessary to me.
Other than that, it looks like i would work.
Hook up a LED you salvaged from some e-junk, see what happens.

EDIT:
It's 1.25V because that's the reference voltage of those lm317

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