Digital Dice with 7-Segment Displays

Overview

An NE555 clocks a pair of decade counters; each counter drives one 7-segment display and rolls stop when the button releases the clock.

Build Steps

1. 1

   Build the clock

   555 in astable mode, around 10 Hz, with a push button that stops the clock while held.

2. 2

   Add the counters

   Two CD4017 decade counters clocked from the 555; each Q output drives one segment pattern through resistors.

3. 3

   Display the pips

   Wire the 7-segment digits through 220 Ω resistors and blank the display while rolling.

4. 4

   Add a roller

   Hold to spin, release to freeze on a random count between 1 and 6.