Circuit Design:
The circuit is fairly easy and un-complicated. It uses 2 555 timers and 1 4017 Decade counter. One 555 control the flash rate for the led sequence (decade counting frequency) and the other is to turn the decade counter on and off. Once the led have gone up and down the row once (2 seconds) we switch the power to the 4017 off for 2 seconds and then back on again for another 2 seconds creating a break between each light chase. Fairly simple hey!
Parts:
1x 4017 16 DIL IC | 2 x 555 8 DIL IC |
6x Red LEDs or any of your choice | 2x 10uF Elec Caps |
3x 10nF Caps | 1x BC547, BC108 etc NPN transistor |
6x 1K resistors | 1x 100K resistor |
1x 7K resistor | 1x 110K resistor |
1x 4K7 resistor | 1x 3.3K resistor |
