18 Simon Says game

18 : Simon Says game

  • Author: Uri Shaked
  • Description: A simple memory game
  • GitHub repository
  • GDS submitted
  • HDL project
  • Extra docs
  • Clock: 50000 Hz
  • External hardware: Four push buttons (with pull-down resistors), four LEDs, and optionally a speaker/buzzer and two digit 7-segment display


How it works

Simon says is a simple electronic memory game: the user has to repeat a growing sequence of colors. The sequence is displayed by lighting up the LEDs. Each color also has a corresponding tone.

In each turn, the game will play the sequence, and then wait for the user to repeat the sequence by pressing the buttons according to the color sequence. If the user repeated the sequence correctly, the game will play a “leveling-up” sound, add a new color at the end of the sequence, and move to the next turn.

The game continues until the user has made a mistake. Then a game over sound is played, and the game restarts.

Check out the online simulation at https://wokwi.com/projects/371755521090136065 (including wiring diagram).

How to test

You need four buttons, four LEDs, resistors, and optionally a speaker/buzzer and a two digit 7-segment display for the score.

Ideally, you want to use 4 different colors for the buttons/LEDs (red, green, blue, yellow).

  1. Connect the buttons to pins btn1, btn2, btn3, and btn4, and also connect each button to a pull down resistor.
  2. Connect the LEDs to pins led1, led2, led3, and led4, matching the colors of the buttons (so led1 and btn1 have the same color, etc.)
  3. Connect the speaker to the speaker pin.
  4. Connect the seven segment display as follows: seg_a through sev_g to individual segments, dig to the common pin of the first digit, dig2 to the common pin of the second digit.
    Set seginv according to the type of 7 segment display you have: high for common anode, low for common cathode.
  5. Reset the game, and then press any button to start it. Enjoy!

Note: the game requires 50KHz clock input.


# Input Output Bidirectional
0 btn1 led1 seg_a
1 btn2 led2 seg_b
2 btn3 led3 seg_c
3 btn4 led4 seg_d
4 seginv speaker seg_e
5 none none seg_f
6 none dig1 seg_g
7 none dig2 none