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.

Headlight indicator 555 (CB9118E)
This circuit warns when the headlight bulb is on. We found it in a Popular Electronics from the...
Variable Active Cycle 4093 (CB15916E)
The oscillator shown in the figure keeps its frequency constant in an active cycle adjustment...
Two-Transistor MW Receiver (CB23975E)
This circuit was found in an Argentine publication from the 1970s. The circuit can be assembled with...