A printed circuit board (PCB) is a core unit of an electronic device with electronic parts mounted on a circuit board. The electronic parts conduct appropriate amounts of current or electric signals ...

Hey folks! I figured this would be best in the observatory. I'm relearning how to use microscopes and learning for the first time how to really use them more effectively, so that I can show my ...

When I was younger, I spent a lot of time collecting things around the house and using a microscope to examine them. While I had a lot of fun examining things, the one thing that was lacking was the ...

First published in 1962 under title: Microscopy. https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!28488~!0#focus ...