Fireplace Control Circuit
Truth Table:
K-Mapping:
AOI Circuit:
NAND & NOR Circuit:
Conclusion:
In this project I was hired to fix a problem in the circuits for a fireplace. I had to create a new circuit that was better than the previous and did not have the same problems as the original fireplace. The company wanted me to make the most efficient fireplace circuit possible, and they wanted it to be as cheap as possible to make. The probe would need to be on for the valve when three or more inputs were on. For the indicator the probe was supposed to be on as long as at least one input disagreed with the others. If every input was on or every input was off, the probe would have to be off. First, I started by making a truth table that had four inputs and two outputs. The first output was the valve, and the second output was the indicator. I then did Karnaugh mapping to make the simplest logic expression that I was able to for both the valve and the indicator. After the Karnaugh mapping was complete I made a basic AOI circuit using the simplified expressions. Once I was done making the AOI circuit, I then made a NOR and NAND circuit. I had to make the valve out of NAND gates because those were the specifications for the company, so that the company could save as much money as possible. On the other hand for the indicator I used NOR gates in order for the company to save more money. Once I completed that the problem with the fireplace had been solved, and could now be sent back to its customers and be used safely.