This circuit was obtained from Dutch documentation from 1964. The components are of the time, but current equivalents such as BC548 to BC108 can be used.
This simple transistor tester circuit was found in the February 1968 issue of Radio Electronics magazine....
A touch of the X1 sensor causes the motor to be activated for a time that can be adjusted in P1....
This is a traditional flasher configuration with two neon lamps. The frequency is given by the 100 nF...