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Old 03-08-2012, 07:04 AM #1
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Default 445 test load question

Sorry guys I'm sure the answer is here but i cant find it. What do i need fora test load for a 445nm diode on a flexdrive.

Thanks a bunch.


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Old 03-08-2012, 07:21 AM #2
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Default Re: 445 test load question

Well you could build one with 6 diodes and a 1 ohm 5 watt resistor there are plenty of circuits here on LPF just use
the search function or you could get one of these and be done with it for ever > FP Super 3 amp Test Load
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Old 03-08-2012, 10:41 AM #3
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Default Re: 445 test load question

I have heard that some multimeters act as test loads.
Is this true ?

Jim
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Old 03-08-2012, 10:47 AM #4
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Default Re: 445 test load question

Quote:
Originally Posted by jimdt7 View Post
I have heard that some multimeters act as test loads.
Is this true ?

Jim
No, a DMM is a measurement tool. Not a testload.
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Old 03-08-2012, 06:54 PM #5
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Default Re: 445 test load question

^A multimeter can measure current - hence it can be a test load (although the load is very small). It's fine for linear drivers and some buck drivers.

6 diodes is too many. You want 3 or 4. The resistor only needs to be 1W provided you run it for short intervals, and 2W otherwise.
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