This circuit was obtained in an 80s documentation on telephony. The components used are TTL, and the power must be made with 5 V.
The pulses applied to input C of the SAA1027 integrated circuit determine the engine speed. Each...
In the figure we have 3 monostable circuits for triggering without rebounds of CMOS circuits. The...
This integrated consists of a mono amplifier for battery powered recorders and radios. The load...