Search found 5 matches

by dedalus
Sat Apr 13, 2024 12:03 am
Forum: Home-made microscope adaptations
Topic: Searching Cree LED for tiny dimmers
Replies: 23
Views: 20778

Re: Searching Cree LED for tiny dimmers

I have made a dimmer with just a mosfet transistor, a variable resistor, capacitor to prevent self oscillation and a fixed resistor, the mosfet conected in series to a led. You can solder it in the air leg to leg and wrap it in insulating tape while keeping stable. Evidently it is totally flicker fr...
by dedalus
Fri Apr 12, 2024 11:44 pm
Forum: Specimens, samples and slides
Topic: Dry Mounted Insect
Replies: 8
Views: 3025

Re: Dry Mounted Insect

I'm totally unskilled mounting permanent slides but i'd wish to note that i have succesfully mounted first time a small insect on a ringed slide just dehydrating it on a single step on 96º ethanol and not dry but in low end pva children's glue. Perhaps somebody more skillful in this may explain if s...
by dedalus
Fri Apr 12, 2024 11:13 pm
Forum: Illumination Techniques
Topic: The Lucigen illuminator
Replies: 7
Views: 731

The Lucigen illuminator

I have recently adquired a vintage Zeiss Standard 14 that i had to restore to be able to use. It featured a very curious combination of light source and condenser for illumination. The Lucigen illuminator consists on a lamp holder for a 6V 5W tungsten bulb that you can center tilting the bulb holder...
by dedalus
Mon Apr 08, 2024 9:58 am
Forum: My microscope
Topic: DIY Slide Ringing
Replies: 4
Views: 3613

Re: DIY Slide Ringing

I have used a round disposable food container cover the diameter of a slide, double sided tape in it, the center is marked by the plastic injection point. And I turned it with my left hand against my keyboard with a small box in front of it making a 90º corner. I ringed with the right hand using nai...
by dedalus
Mon Apr 08, 2024 9:48 am
Forum: My microscope
Topic: Picked up a legacy Zeiss
Replies: 7
Views: 2770

Re: Picked up a legacy Zeiss

I have also picked recently a legacy Zeiss. It was an Standard 14 complete with binocular head and 4 objetives. It features compensated "c" eyepieces 12,5x , 3,2x acro objetive, 10x acro, 40x 0,65 acro and a "oel" 100x. Very standard configuration. What was a bit strange was its Lucigen illuminator....