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.
We found this circuit in a Linear Technology component manual. The circuit also has a DC zeroing...
This circuit has been found in older telecommunications documentation. The circuit switches off after...
This circuit activates an incandescent lamp at dusk and goes out at dawn. The sensor is an LDR and...