For a long pulse, the capacitor charge voltage will be > v, hence comparator outputs a high. Thus, we get pulses at the comparator output whenever input pulse widths exceed the required pulse width, ...

Compared to the simple diode needed to demodulate AM radio signals, the detector circuits used for FM are slightly more complicated. Wrapping your head around phase detectors, ratio detectors, disc… ...

Described here is a microcontroller-compatible event detector circuit built around one long-familiar CMOS presettable up/down counter chip, CD4029N from Intersil. Circuit Description Here, the ...

There are many ways to detect a heartbeat electronically. One of the simpler ways is to take [Orlando’s] approach. He’s built a finger-mounted pulse detector using a few simple componen… ...