This circuit drives 4 sequences of 5 LEDs that can be of any color. The frequency depends on the characteristics of the photosensor. The circuit is from an 80's documentation.
This circuit was found in an American documentation from 1970. We can increase the number of...
This amplifier with the RCA CA3018 integrated circuit was found in the August 1970 issue of Radio...
This three-transistor circuit can control 3 V relays or servos from 17 MHz modulated transmitters. The...