Instructions for modifying a Logitech C270 so that one can adjust the focus manually. The Logitech C270 is an inexpensive all-purpose webcam with a fixed focus which is set at the factory to be used for face-to-face video meetings with the camera placed on top of your computer monitor or above a laptop screen. The […]
I’ve just completed building a small electronic clock from a kit, the YSC-4 kit from HiLetgo, which I was able to purchase from Amazon for under $9.1 My interest in this kit was to find something simple that is nevertheless good soldering practice for advanced beginners, and I was not disappointed. Overview The kit provides […]
Have you ever taken something apart and then put it back together and had parts left over? Me too. Sometimes it’s something I know isn’t needed, but it’s still better to get everything back in the right place. A few years ago I discovered a little trick that helps me do that. What I do […]
by Laurence Rowe and Eric Myers We use the Cenco 33031 Low Voltage Power Supply (Figure 1) for several of our electricity and magnetism labs. It can provide variable DC up to 6 Volts at up to 5 Amps, and it can provide a steady AC voltage at around 22 VAC. Unfortunately, our students sometimes […]