Overview
The circuit designed will display my birth date when the three switches are flipped in a binary order
Truth table
The truth table show all the possible inputs and the corresponding outputs.
The A through G on the table represent the seven segments of the display and what segments will light up with the designated inputs.
Multisim
This is the multisim circuit implementation this shows what the circuit does and what its made of. this image describes how the breadboard will be built
it is in bus form to make the diagram easier to read. 6 NAND gates, 8 NOR gates, 2 AND gate and 1 OR gate was required to create this. 7 chips were needed. NAND and NOR are used because they can be used to create simple logic gate with on chip. When I used the NAND and NOR it contained more gates but the same amount of chips however if used on a smaller scale there would be a major improvement. A seven segment display works by powering separate leds to create the image of an number. The common cathode requires the leds to be powered and the display to be grounded. The common anode requires that the leds be grounded and the display to be powered. The resistors are used to limit the current to the leds in the display and the common value is 220 ohms.
Bill Of Materials
the bill of materials shows what is needed to build the circuit and how much of each component.
Breadboarding
This breadboarding experience was far more complex than the first. There were many more components and more complicated wiring making it harder to find mistakes in the circuit. I made the mistake of wiring the NOR chip wrong because the pin out is different from the other chips. The way I found issues was messing with different wires until something changed.
Conclusions
I learned how to use NOR and NAND in a real life scenario. Next time I will set up a better system for the inputs such as X and not X.