This circuit is from a Radio Electronics magazine from February 1992. The circuit has the effect speed dependent on C1 and adjusted by R3.
We found this circuit for video games in a Radio Electronics magazine from August 1977. The...
This circuit was suggested by Philips in 1967 documentation. The circuit receives modulated light and has...
We found this version of the siren that makes the American police siren sound in a 1980...