So webcams are quite fun, they take pictures, you can record videos, but what if you could take pictures of microscopic objects? This is a simple and reversible modification for a webcam which lets you take pictures of things far less than 1mm wide!
Step 1: The raw materials
You only need two things for this microscope:
1. A webcam with an unscrewable lens (I got a really cheap one for about £5 on ebay)
It is absolutely vital the webcam has an unscrewable lens, almost all do (and for most webcams this is actually the way you focus!).
Step 2: Dissasembling the webcam
This bit is dead easy, just unscrew the lens from the webcam! Once you have taken the lens out be careful not to get any dust on the CCD (the sensor in the body of the webcam) or on the back of the lens. Dust on either of these is very hard to clean off and can mess up the pictures.
Step 3: Reassembling the webcam
Now just use blu-tack to stick the lens back in the webcam, but backwards. Make sure you get a nice tidy fit, you want to avoid any light leaking around the edge of the lens. For me this was simple because the lens slotted neatly back into the body of the webcam. For some webcams you will have to use a thin sausage of blu-tac to seal around the edge of the reattached lens.