What is it?

Electronic lucky encoder by NE555 and CD4017 two chips and other components of lucky encoder module

A, The Principle

Circuit is mainly composed of pulse generator and a decimal counter circuit.

Pulse generator is composed of a multivibrator NE555 and peripheral components.

When press the button S1 Q1 conduction, NE555 3 feet output pulse, then CD4017 10 outputs took turns to drive the output level 10 LED light in turn.

Loosen the button, with the existence of the capacitor C2, Q1 will not immediately stop, as the voltage drop on both ends of the C2, conduction program of Q1, 3 feet output pulse frequency is slow, LED moving frequency varies with the slower.

Finally when C2 after discharge.Q1 closing, NE555 3 feet is no longer the output pulse, LED to stop moving.

B,Game Shows

Function play:

• lucky wheel is to predict the moving wheel stops, in which position of the tool will stop.A game also can be used as a number, electronic dice, drawing machine, etc.
• Electron spins is to achieve the same function, in the form of electronic book suite configuring 10 LED to a circle, when press the button, each one in turn LED order, at the start of the flow speed quickly, all leds look like all together flashing, flow will be more and more slow, finally settled on a LED only no longer move.If finally shine that LED the same as the players predicted, "winning".

C,Electrical Specification

• The input voltage: 3.5 ~ 6 v
• PCB size: 5.2 * 5.2 cm