The integrated circuit used in this circuit from a 1987 documentation is no longer common today. This circuit can generate a multitude of different sounds and this circuit is an example of application.
This circuit has a very fast switching action from an input signal. It can be applied to almost any...
This circuit drives 10 LEDs in sequence at a speed that depends on the setting of P1. For 9 or 12 V...
The amplifiers of the LM3900 can also be used as voltage comparators in several projects. The...