I have built the open flexure microscope, the Raspberry Pi based open source microscope detailed at https://openflexure.org/projects/microscope/
Open Flexure 3D Printed Microscope
Uses Raspberry Pi, Pi Camera module, Arduino and stepper motors for positioning and focus
Objective
Laboratory objectives can be used, but this is the R-Pi v2 camera module with the lens removed, reversed and displaced about 20mm with a 3D printed adaptor
Blinken Lights
Stepper motors driver board LEDs arranged in extra layers for effect rather than Sangaboard
First image aquarium water
More aquarium water
Pine needle cross section from prepared slide
Aquarium water
Stepper driver mount
Stepper driver in side sangaboard case
Condensor lenses arrived from China. Lighting is much improved
Pine needle cross section
Tilia stem cross section
Mushroom cross section