We found this circuit in the Linear Applications Handbook of the 1994 National Semiconductor. The transistor must be a high voltage type and the LM3900 power supply must be symmetrical.
In the figure we have 3 monostable circuits for triggering without rebounds of CMOS circuits. The...
This circuit connected to the input of a good amplifier, with suitable coils can tune stations of medium...
The presented circuit monitors a line indicating if it is busy if there is an extension. The...