This circuit generates short pulses. The transistor can be a 2N2222 or BC548 and the frequency is given by the resistors and the capacitor that can be changed.
This circuit is from an old publication, from 1992, being indicated to test the old joysticks of...
This circuit simulates lightning using a small white lux type fluorescent lamp. The circuit is...
The frequency of this astable multivibrator depends not only on the capacitors, but also on the...