A far more useful case is to provide a power supply for the microcontroller programmer, which has no wall wart. Today’s microcontrollers consume less current than their predecessors, so you can easily ...

Anyway, I was assuming that I'd have to go out of the serial port and into a microcontroller of some kind to turn the bitstream into a raw voltage corresponding to percentage of processor usage.

The Plan The plan is simple enough. A Linux program listens to a real serial port and watches for special character sequences in the data stream.

The most common way of programming AVR microcontrollers is the In System Programming port. That little six-pin header with MOSIs and MISOs coming out of it will program every AVR you’ll ever ...

So I'm trying to detect through Visual Basic 6.0 when a voltage change occurs on one of the pins of the serial/parallel port. The whole thing is pretty simple; no data transfer/handshaking/etc ...

Many industrial and instrumentationsystems need to measure theduration of pulse inputs, such as frequencyfrom rotational-speed sensors,gating and strobe pulses from externalsystems, and PWM ...