This circuit responds to frequencies from 100 Hz to 3 MHz. We find it in a 90s Radio Electronics. Transistors are general purpose types.
Considering that the speed of light is extremely great which makes us see a lightning flash...
We found this circuit in a 1981 publication, when it was still possible to find 22.5 V batteries (used...
It is possible to design a monostable multivibrator around a voltage comparator of the four...