Old 09-14-2016, 08:25 PM #17
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Default Re: BlackBuck 8M 8A Modulated Buck Laser Diode Driver + External Pot

Did not find "attachment" option in Edit menue so here it is

Each resistor is rated at 10W, so 50W heating should be OK for 5 of them I suppose.
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Old 09-14-2016, 08:59 PM #18
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Default Re: BlackBuck 8M 8A Modulated Buck Laser Diode Driver + External Pot

What's the drop on 5 those 5? What are you checking with all those?!
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Old 09-14-2016, 09:37 PM #19
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Default Re: BlackBuck 8M 8A Modulated Buck Laser Diode Driver + External Pot

The drop is the voltage. If your driver is set to 3A, the drop will be 7.5V, if to 4A, then 10V. Works well - you can see Volts and Ampers at one screen.

I use it to set the driver current. Indeed, I did not find any test load which was described as behaving like a series of 2 or more blue diodes. It looked like all test loads were designed to mimic the behaviour of just one laser diode, so common voltage drop was in range of 3-5V if I recall it right.

I know this set does not look super professional, but simple things also work if there is no high tec stuff at hand when needed...
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Old 02-09-2017, 10:29 PM #20
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Default Re: BlackBuck 8M 8A Modulated Buck Laser Diode Driver + External Pot

Just got one of these and checked the NTC, it reads 10k ohms at room temp and 20K outside, I did not warm it but my question is if this is needed at all or a 10k resistor in it's place or will the driver work without it?

p.s. I know a jumper/switch/pot is needed on the other side.
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Old 02-09-2017, 11:23 PM #21
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Default Re: BlackBuck 8M 8A Modulated Buck Laser Diode Driver + External Pot

I don't bother with the temp sensor.
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Old 02-10-2017, 12:20 AM #22
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Default Re: BlackBuck 8M 8A Modulated Buck Laser Diode Driver + External Pot

Yes thank you, I just found that out, it works just fine without it.
p.s. Getting older sucks, I used to be able to see tiny stuff so well.



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