Here is yet another modification to the “LED Flasher” project. This circuit has six LEDs, configured in a row, that glow sequentially back and forth very much like the lights on the computerised car in the “Knight Rider” TV series. The frequency (how fast the LEDs switch on and off) can easily be controlled by the variable resistor (Trimpot) from anywhere between 6Hz to 45Hz.
Semiconductors Resistors (0.5W, 1%) Capacitors Other
1 x 1N4001 diode
8 x 1N4148 diode
6 x 5mm red LED
1 x 555 Timer
1 x 4017 Decade Counter1 x 500R
1 x 1k
1 x 15k
1 x 100k trimpot (single turn)1 x 10nF (ceramic)
1 x 1uF (electrolytic)
1 x 10uF (electrolytic)1 x 9V Battery
