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# CSC303/EEN210: Digital Logic Design/Digital Circuits - Engineering Assignment Help

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• Subject Code :

CSC303EEN210

• University :

ABU DHABI UNIVERSITY

In this project, you are asked to design and construct the lamp logic for a stationary bicycle. As the rider increases their pedaling speed, lamps will light on a bar graph display. The mechanism is as follows:
• No Motion = No lamps will light up.
• Increase in Speed = Lamps start to light up from bottom up. L1 lights first, then L1 and L2 light up, then L1, L2, and L3 light up, until all lamps light up at the highest speed.

As soon as all lamps illuminate, increasing the speed of pedaling doesn’t have any effect on the display. This is due to that fact that there is a small DC generator coupled to the bicycle tire, which outputs a voltage proportional to speed. This drives a tachometer board that limits the voltage at the high end speed where all lamps light. As such, no further increase in speed can increase the voltage beyond this level. This is crucial because the Analog to Digital (A/D) Converter puts out a 3-bit code, ABC, but we only have 5 lamps. A is the Most Significant Bit (MSB) and C is the Least Significant Bit (LSB).

Project Requirements
1. Create the truth table given 3 input bits: A, B, and C that correspond to the speed of pedaling and 5 lamp outputs L1, L2, L3, L4, and L5. When ABC = 000 then no lamps light. For the speed denoted by 001, L1 would light up, and so on. When all the lamps are lit up, we no longer care about the response to the input code.
2. Build the Karnaugh Maps for the 5 lamps and determine their simplified Boolean Algebra Expressions.
3. Use Multisim Software to implement the whole lamp logic given 3 inputs ABC, and 5 output lamps.
4. Using Tinkercad, implement a functional circuit for the whole lamp logic using digital logic Integrated Circuits (ICs) such as AND, OR, NOT, NOR, NAND gates. You will need the following components:
• Basic Logic ICs
• Toggle Switches
• LEDs
• Power Supply
It is necessary to confirm with the Engineer the truth table before progressing with the next steps. Document your progress for each step and include all the steps in your project report. This includes the truth table, Karnaugh maps, Multisim circuit, and Tinkercad simulation pictures. Do not include any picture without at least a paragraph of explanation.
Design Constraints
• Use minimal number of ICs to reduce the design cost.

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• Posted on : November 30th, 2018

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