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A new use for analog oscilloscopes; generating pseudorandom sequences at 1.5 Gbps; and the extremely rare EDA-related Design Idea
In the latest batch of Design Ideas, Antonio Eguizabal of Freescale Semiconductor sent in Oscilloscope helps obtain Bode plots in non-50-ohm environments. As an alternative to building or purchasing custom buffer amplifiers, you can use the near-ideal amplifiers in an analog oscilloscope that provides a vertical amplifier output on its rear panels—fo... (more) Details... more...
Microcontroller as voltmeter, testing lithium-battery chargers, canceling common-mode voltage, and more
The circuit in "Microcontroller functions as voltmeter," by author Noureddine Benabadji is an extension of his previous Design Idea on how to use an analog input in a microcontroller lacking a built-in ADC (see "Microcontroller, JFET form low-cost, two-digit millivoltmeter"), and it... (more) Details... more...
A hex (code) upon us
In the recent Design Idea "Find hex-code values for microcontroller’s ADC voltages," we flubbed a key formula. The typo made the Design Idea seem less impressive than it actually is and prompted some colorful reader comments.... (more) Details... more...