A mini roulette circuit, as soon as the switch S1 the output next to pin 1 of the IC1a the voltage is “sharp”,The oscillator circuit output IC2b, IC2c work out.alarm clock pulse generator fed to IC3, a voltage “high” output to the output pins 3, 11, and pin 12 of the IC3, the LED1-LED10 light track sequence. Section LED11 parade high - low instant. The output of pin 3, 2, 4, 7, 10, of IC3 represented by high points,Output pins 1, 5, 6, 9, 11 as a replacement for of the IC3 with the low points.The roll-over prize meant for the LED12.The IC1b, IC2a and IC2d like controls.
Resistor R2 and capacitor C1 determine the punctuation mark of the output “excessive” output from pin 1 of the IC1a. The capacitor C1 through R2. as you press the switch and the voltage shelve across C1 spirit little by little swell until the greatest level. It will reset the flip fall down IC1a suit the output next to pin 1 is “low”. And the oscillator output circuit to pause working, but at hand are a number of LED illumination are pending, it might exist to facilitate we close up being the LED. So carry out not concern, it desire switch a only some time.since, particular a schedule punctuation mark with the aim of the R2 and C1. The diplomacy are compulsory to keep a 6-volt power supply. If distorted is 9 volts, requisite try representing security reasons.