This is a little LED illuminator for microscopes. In particular the AMScope T490B which it has been tested on, though it should work on any microscope with a similar light diffuser shape.

If you want to try some bright white LED light in your incandescent AMScope this is the project for you!

The cool white light of the LED and high brightness gives a crisp image through the eye pieces. Note that the light is mostly normal to the lens, so acts as if the 'scopes diaphragm is quite closed.

It uses a USB powered fibre optic illuminator, which can be run from a power-bank, or a USB wall plug.

It's customiseable to tweak your own version to perfection!

(The selotape on mine around the LED illuminator is because I'm paranoid I'll eventually snap the wire so I added it as a way to protect the wire from bending too much.)

Items:

15mm x 15mm x 15mm right angle reflector:
https://www.aliexpress.com/item/4000032747262.html?gatewayAdapt=glo2pol

Fibre optic (4mm inner minimum, 1 meter or less), black sleeve:
https://www.ebay.co.uk/itm/255496321128

3-10mm 5V Creative USB light Source LED illuminator For Glow Optic Fiber:
https://www.ebay.co.uk/itm/163193527542

You'll need to ensure the fiber tube is cleaned out and smooth before pushing the fiber into it!

Other than that, it should be easy to drop the reflector in, and connect the fiber to the light and this stand.