This circuit can use a pendulum sensor. We found this configuration in a 1994 publication. The components used are common and the timing is given by the capacitor C1 which can be changed.
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...
This circuit checks the oscillation capacity of a transistor. The circuit can be used with fixed...
This circuit was obtained in a General Electric documentation from the 90's. The circuit consists of a...