Collaborate Disseminate
When it comes to getting signals from an analog world into our computers, most of us don’t give much thought to how the hardware that does the job works. But …read more Continue reading Homebrew Circuit Explores the Mysteries of Analog-to-Digital Conversion
Riffling through my box of old projects, I came upon a project that I had built in the 80’s — an Automotive Multimeter which was published in the Dutch/British Elektor magazine. It could measure low voltage DC, high current DC, resistance, dwell angle, and engine RPM and ran off a single 9V battery. Besides a 555 IC for the dwell and RPM measurement and a couple of CMOS gate chips, the rest of the board is populated by a smattering of passives and a big, 40 pin DIP IC under the 3½ digit LCD display. I dug some more in …read more
