This dual flasher for high brightness LEDs was found in an American documentation from the 90's. The circuit can be powered by lower voltages with the reduction of R1 and R4.
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...