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PIR sensor
Just got a PIR sensor. PIR, as I understand, stands for Passive Infra Red. It’s a cool little thing that detects motion, or actually changes of infrared light. Infrared, in this case, is heat. So whenever a person, or part of a person, or perhaps an animal, or part of an animal moves infront of…
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Oscilloscope
An oscilloscope? Yes, I want one, but is it really worth the money? Will I use it enough to justify the investment? It’s cool and all, but… An oscilloscope is certainly not necessary for someone programming microcontrollers and building small electronic projects. But it does provide a way of looking at electrical signals – and…
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Four-digit-display
When I first saw them for sale in a catalog, I immediately knew I needed them! I just had to figure out a good use for them. Each kit includes two fairly large 7-segment LED displays from Velleman (K8063) controlled via RS232. Perfect for hooking up to a computer to display… digits..? So I ended…