This circuit found in a 90s Popular Electronics, triggers a huge array of LEDs from the sounds captured by a microphone, thus generating visual effects.
This mechanical reverberator circuit for guitar was found in the February 1970 issue of Radio...
This circuit generates high pulses from a sinusoidal input, using SCRs for this purpose. The...
September 2016 - It can be purchased from Mouser Electronics the new ultraviolet high power LEDs...