Pulse-triggered 7555 monostable (CB25128E)

We found this circuit in a Radio Electronics magazine from April 1988; The output timing is given by R1 and C1.

Voltage Sensor 4069 (CB25881E)
Other CMOS gates can be used in this sensor, which we found in the July 1995 Electronic Now...
Electronic Pendulum (CB5022E)
This circuit is from the American magazine that no longer exists Science & Electronics,...
200 Hz to 2 kHz VCO (CB25247E)
Using the 4046 PLL we found this circuit in the December 1989 Radio Electronics. The circuit...