Clickey
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- Joined
- Mar 15, 2009
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Accidentally posted on wrong section. I meant for this to be under tutorials help and repairs.
So how can I delete this post?
So how can I delete this post?
Last edited:
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Please delete this post (I posted in wrong section accidentally)
- Thread starter Clickey
- Start date
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
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