Found in a 1969 documentation, this circuit is reset by a push button. The activation time is 100 us. The transistors are from the era.
With this circuit it is possible to use a common hair dryer as a hand dryer. The circuit is timed...
This circuit was obtained from an English magazine from 1979, but can be easily assembled today...
This circuit was obtained in a 1975 magazine, but it can be easily assembled using BC548...