A good lighting is essential when inspecting things through microscope. Built in light sources might not always be the best solution. It practically depends on what things are you looking at. For instance, if you need to inspect electronics circuits – you can get shadows depending on component placement and so on. Finding this situation uncomfortable, Steve built his own light source that can be mounted on his microscope. This is basically a dual LED ring controlled by Attiny1632 microcontroller.
Microcontroller is programmed with different light patterns that can be selected with couple rotary encoders and three buttons. Cycling through different options you can get best possible light combination that allows seeing best image through microscope.