This circuit was found in a Popular Electronics from the 90s. The effect circuit uses components that are still common today. In fact, the circuit has only 3 channels of 12 LEDs.
The circuit shown in the figure consists of a phase shift oscillator and its components have been...
This amplified speaker is from a Radio Electronics from September 1988. The power integrated...
Texas Instruments UCC21225A is available from Mouser Electronics. It is an isolated gate driver...