Create and demonstrate an anti-theft warning circuit that:
• Illuminates green LED if there is no input to light, sound and touch sensors
• Illuminates yellow LED if one of the light, sound and touch sensors receives input
• Illuminates red LED if two of the light, sound and touch sensors receive input
• Sound an alarm (using a circuit created by students) if all three sensors (the light, sound and touch) receive input
• What is a sensor?
• What is digital logic
• How are digital processors designed?
Students will be able to answer the following questions:
1. How many possible outputs are there for n-digital inputs?
2. What is a “don’t care” condition?
3. How do the OR, AND & Inverter gates work?
Students should be able to:
• Determine a threshold value for detecting light, sound and touch
• Design and build a circuit that triggers outputs based upon combinations of sensor inputs.
Students will know:
• The basic idea of how light sensors function
• The basic idea of how sound sensors function
• The basic idea of how touch sensors function
• How to calculate a binary number
• How logic gates function
• That no voltage is not the same as:
a. The low voltage value
c. Negative battery terminal
• How to build a circuit
• How a simulator can assist an electrical engineer