This circuit, which can be found elsewhere on this site, detects positive pulses of a signal. The circuit was suggested in Texas Instruments documentation from the 1980s.
This circuit is from the 1977 GE semiconductor manual. The components used are uncommon today....
This circuit has 4 operating modes and was found in the 1995 Encyclopedia of Electronic Circuits...
The voltage of 30 V indicated in this project, shown in the figure, depends on the diac used. It...