This circuit that imitates the sound of the cowboys' calls with their “louder” was found in a Hands On Electronics from the 80's. The integrated circuits used are from that time.
The circuit is from 80s Siliconix documentation. The integrated circuit is from the company and is not...
Servo motors operate from the changes in the pulse width in a range between 1 and 2 ms. The...
We found this circuit in a Radio Electronics magazine from April 1988; The output timing is given...