Electronic Dice

Posted on Feb 6, 2014

It is good idea to put this circuit in a box and mark/write each LED with number 1 to 6. Now, when switch S1 is pushed momentarily, any one of the 6 LEDs will glow. The Number marked for glowing LED becomes dice`s output. Every time S1 is released, new LED will glow randomly. Chances for each LED to glow is 16. 66%. This circuit makes use of two IC

Electronic Dice
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s, IC555 and IC-CD4017. IC-555 is used as square wave generator, and IC(CD4017) as a counter. Actually CD4017 is a divide-by-10 johnson-counter with 10 decoded outputs. IC555 simply generates clock for CD4017, and the clock frequency is controlled by R1 and C1. Counter CD4017 starts counting from 0 to 9 by putting high voltage on each of the 10 pins (one after another). The High voltage shifts from one pin to another on every positive edge of the clock. Since, in our circuit pin-5 is shorted with pin-15(reset), the counter gets reset after reaching 6, and again starts from 0. Now, when S1 is pushed, IC555 generates clock for CD4017. This clock enables CD4017 to count from 0 to 6 by putting high voltage on each of the 6 pins (one after another). These 6 pins are connected to 6 respective LEDs. When S1 is released, high voltage gets latched to any one of the 6 pins, and this becomes output of the DICE. All the material on this website is copyright property of Material on this site is for personal use only and can not be used for any commercial activity without written permission of Use the information provided within this website at your own risk. Information within this website is provided as-is without warranty or guarantee of any kind. Please read Copyright and Disclaimer notice carefully.

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