The circuit shown, with the printed circuit board, was found in an article in the June 1990 issue of Radio Electronics magazine. Integrated circuits must be equipped with heat sinks.
The LM1468L can also be used. The circuit is from Motorola's Linear Interface ICs and the...
We found this light-effect circuit with LEDs using the well-known 4017 in a 1987 documentation. All...
This circuit was found at Popular Electronics. The speaker is of the greater than 100-ohm...