MicrobeHunter.com Microscopy Forum

#7 The right hand image has 10 alterations, can you spot them.



Answer: https://drive.google.com/file/d/19oSGd3 ... sp=sharing

How areyou progressing on this project? Sorry to say I have been to busy with more important things at the moment. The project is still, as is, on my workbench. In the meatime I received a short length of 3mm dia optical fibre which I plan to use similar to your own project. I hope to get back to i...

#6 The right hand image has 10 alterations. Can you spot them.



Answer: https://drive.google.com/file/d/1x1szyb ... sp=sharing

Thank you macnmotion and Free2Fish for your updates. I find all this very interesting and inspiring.
I too hope to be having my own pond aquarium soon.

Cool thread. Thanks for sharing.
Any updates?

#5 The right hand image has 10 alterations. Can you spot them?



Answer: https://drive.google.com/file/d/1VBg9xZ ... sp=sharing

#4 The right hand image has 10 alterations. Can you spot them?



Answer: https://drive.google.com/file/d/1Rkb2lt ... sp=sharing

IMHO, mostly fear. Hunger, seeking, and preservation/survival are forms of fear.

Cool. Thanks for sharing.

jorymil wrote: ↑

Thu Jan 11, 2024 3:30 am

"My compliments to the chef, Quark! These tube grubs are chilled to perfection!"

Sure Squintsalot wrote: ↑

Sat Jan 20, 2024 12:52 am

Hey this is good sport! Thanks for the challenge!

Thank you Sure Squintsalot. Glad someone gets some entertainment from it.

#3 The right hand image has 10 alterations. Can you spot them?



Answer: https://drive.google.com/file/d/1akE9V- ... sp=sharing

They say "great minds work together"...who are we to argue?? :lol: On a more serious note, unless you are going to photograph your specimens, I don't think DC is going to make much difference. If photographing, then you have to be aware of the PWM frequency vs camera shutter speed. I made mine so t...

You might want to look at my holder in the following thread to get some ideas of what to do. By the way, a very nice project and well thought out!! I wish I had put a little mre thought into mine. https://www.microbehunter.com/microscopy-forum/viewtopic.php?f=28&t=19369&p=141099#p141099 Cool. I am ...

Thanks to FredH I have been able to simplify the circuit, now being (version 1.5)



I have tested this circuit on a test board, and it works fine. The question is, will I be able to come up with a simple light projecting solution.

Hi Nubee, What is the function of the 4001 nor gates in your circuit? It looks like IC2a, IC2b, IC3a just invert the 555 output to VR4; IC2c, IC3b just send the (uninverted) 555 output to VR2. Why not just use a single nor-gate inverter to VR4, and tie the 555 output directly to VR2? Or better, wir...

I will be posting a new Spot The Difference game every week. Here is another till next week.
#2 The right hand image has 10 alterations. Can you spot them?



Answer: https://drive.google.com/file/d/1a_kODI ... sp=sharing

The right hand image has 10 alterations. Can you spot them?



Answer: https://drive.google.com/file/d/1OnZ16u ... sp=sharing

Great thread, Nubee..thank you and group. I often wonder what most closely simulates the natural ambient illumination regime of observed living protists and meiofauna. Are not sand particle interstices inhabiting organisms exposed to a totally different insolation reality than the 'blast of microsc...

Correction to PWM circuit.
Sorry about that.

My circuit drawing (version 1.4) had a fault which stopped the circuit from performing properly. Pins 12 and 5 of IC2 needed a pull-down resistor (R*) for a '0' gate reading. I used a 1k resistor.

But did you have fun trying it out? There's almost always going to be someone who's done something before you, but the knowledge you gain for yourself is still worth it. I think all of us here love the giddy feeling of discovery. Not sure what your math/science background is, but you might want to ...

Thanks for heads-up, and the photos. To me, what you have shown with the green LED looks great to me... but disappointing for you. Because of this it is obvious that I don't know much about microscopy, and have lots to learn. . Fear Not !! We all have lot to learn … that’s one of the beauties of th...

Copied from the site of a firm named Synopsys. It shows the light losses when the tip is tapered to produce a narrower end. They state that losses are substantial. light guide.jpg Damn. Well, I got the LEDs and in combination will take up a larger than required diameter of light beam. So I have no ...

'Why the flare out' .. 'why the black ring' ? My guess; the light that is entering the cone and going less than the critical angle will exit the cone and other light (heading straighter) will bounce down the inside of the cone (?) I think that the cone ought to concentrate light. Conrad Beck in 'Th...

My solution to the above post is to drill a hole into the end and insert an optic fibre. Then light proof the whole thing, except for the end of the projected fibre. I regret to say, you are likely to be disappointed … Fibre Optics have an ‘exit angle’ MichaelG. Here are some reasonably self-explan...

A light guide does not "concentrate" light or "funnel" it or focus it, regardless of the geometry of the tip (square cut/frustum). As mentioned, one can axially drill a 5mm LED, insert a 1mm-diameter (say) optical fiber into the bore, attach it with epoxy, and cover the LED by means of a PVC shrink...

My solution to the above post is to drill a hole into the end and insert an optic fibre. Then light proof the whole thing, except for the end of the projected fibre.

I have a light refraction (I think) problem that I hope anybody from the forum could guide me what to do, or just bear it.

I apologize for the somewhat dire tone of my OP. In terms of learning about microscope optics and lighting circuitry, this sounds like a really fun and worthwhile project. Even if you don't get exactly what you want, it sounds like a really worthwhile experience. Science is a lot of times about the...