User Manual

Use this circuit and select Game 20 using the game selection procedure
in project 17.
Once the player selects Game 20 and sees “Go” on the display, then:
● Press button C and the LEDs will all go off and 0 will be on the U29
LED display.
● Continue to press button C and the 7-segment LED will increase
by 1 each time you press button C, and the LEDs will go through a
sequence as shown below. These sequences correspond to the
binary coded decimal representation of the number in the first
column.
Most computers store numbers in binary, which
represents a number using only two states, typically
0 or 1 (because the simple electronic memory circuit
actually storing it can only be on or off). Binary uses
several 2-state numbers to represent a single
number with more states, such as an octal number
with 8 states or a decimal number with 10 states.
This circuit uses the U29 LED display to show an
octal number with 8 states (0-7) and the same
number in binary using 3 LEDs (red, yellow, & green).
U29 LEDDisplay Green LED Yellow LED Red LED
0
1
2
3
4
5
6
7
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Project 40 Binary Coded Decimal