Experimentations with high powered LEDs for microscope illumination

Here you can discuss DIY adaptations to the microscope.
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Crater Eddie
Posts: 1858
Joined: Wed Nov 12, 2014 4:39 pm
Location: Illinois USA

Re: Experimentations with high powered LEDs for microscope illumination

#121 Post by Crater Eddie » Tue Jul 14, 2015 3:32 pm

That's the problem working on a project via "long distance", it's very easy for misunderstanding to take place.
I'll be interested in what they tell you. They were very fast in their response to my inquiry.
Olympus BH-2 / BHTU
LOMO BIOLAM L-2-2
LOMO POLAM L-213 / BIOLAM L-211 hybrid
LOMO Multiscope (Biolam)
Cameras: Canon T3i, Olympus E-P1 MFT, Amscope 3mp USB

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75RR
Posts: 8207
Joined: Sun Oct 12, 2014 2:34 am
Location: Estepona, Spain

Re: Experimentations with high powered LEDs for microscope illumination

#122 Post by 75RR » Tue Jul 14, 2015 5:39 pm

No answer to the email, and though on page 2 of the PDF it does state that the Control/Dimming goes from 0 - 10V, which would seem to imply that whoever drew the charts did not bother to extend the voltage/current curve to 0 (see range of present Controller/Dimmer in red as a comparison), I do not think I can risk $18 + postage on a maybe.
Do need the Voltage/Amperes at 0 when the Dimmer is turned on and off.

Nominal 10V setting on Power Supply
IN Range 13.4V -11.3V
OUT Range 2.24V - 11V
OUT Range (Incl. Resistor) 1.98V - 3.2V
Current Range 0.05A - 2.12A

Nominal 12V setting on Power Supply
IN Range 16V - 13.2V
OUT Range 2.3V - 12.9V
OUT Range (Incl. Resistor) 2V - 3.3V
Current Range 0.07A - 2.74A
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)

billbillt
Posts: 2895
Joined: Mon Nov 10, 2014 10:01 pm

Re: Experimentations with high powered LEDs for microscope illumination

#123 Post by billbillt » Wed Jul 15, 2015 1:49 pm

I bought one of these on Ebay to try out instead of the 20A unit that costs more than twice as much... According to my calculations, a 10A unit is more than adequate up to an including a 10W LED...

http://www.ebay.com/itm/251539147533?_t ... EBIDX%3AIT

ADi
Posts: 301
Joined: Fri May 05, 2023 4:05 pm

Re: Experimentations with high powered LEDs for microscope illumination

#124 Post by ADi » Fri Jun 02, 2023 3:46 pm

Hi,
I use the XHP50.2 because it fits well with the Köhler illumination of the Lomo.
A larger LED would unfortunately not bring much.
Best, ADi

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