• 12/9/17 6:20 pm
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This is a 4-bit calculator of my own design, capable of adding subtracting and multiplying two numbers 1-9, then displaying the answer in Hexadecimal on two seven segment displays.
It is possible to send numbers greater than 9 into the system by pressing the buttons on the panel in rapid succession.
The Calculator itself can handle 2 numbers up to 15 but the button panel only goes to 9.
Update: Now has enter button.
It is possible to send numbers greater than 9 into the system by pressing the buttons on the panel in rapid succession.
The Calculator itself can handle 2 numbers up to 15 but the button panel only goes to 9.
Update: Now has enter button.
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Unfortunately when I designed this thing, the easiest way to build the display made it so that most people couldn't read it...
The display actually outputs the number in base 16 instead of base 10. So instead of each digit being 1-9, each digit goes from 1-9, then A,B,C,D,E,F, 10 , 11,...1D, 1F, 20,...etc.
So 6+4=A is actually the correct answer.
The circuit to convert the number from an 8-bit binary input to a 7-segment display was WAY easier to do in base 16 since each display chunk could handle 4-bits.