This programmable sound circuit was found in the July 1978 issue of Radio Electronics magazine. It uses an integrated circuit of the time dedicated to producing effects.
We found this circuit in a 1994 documentation. It can be implemented with the indicated...
This is the name of an interesting lighting effects device for discos, ballrooms or even shop...
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...