Сейчас ищут
Led Chaser Using 4017. Смотреть видео: LED Chaser Circuit Using 555 Timer 4017 IC On Breadboard Basic Electronics Projects, LED Chaser With 17 LEDs Cascading IC 4017, LED Chaser With 80 Channels How To Cascade 4017 ICs Together, Simplest LED Chaser Using IC4017 Without Timer IC.