PS4 - ENES 100 Introduction to Engineering Design Fall 2010...

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ENES 100 Introduction to Engineering Design Fall 2010 Problem Set #4 Assigned: Sept. 24, 2010 Due: In class on Oct. 4 (M) or Oct. 5 (Tu) Reading: Chapter 6 of the course text on RobotC Programming Problems: 1. Suppose your controller (NXT or Arduino) has an analog input port that consists of a 5V power supply and a current-limiting resistor in series, as shown in the following figure: You can connect your external circuitry across the two open pins, and the controller can measure the voltage drop between these pins. In lecture, a wiring schematic was provided which would allow your team to place two CdS photoresistors on a single input port. Suppose your team plans to build a hovercraft that uses a total of eight CdS photoresistors. This requires that two sensors be placed on each port. a. Based on the table of values for the resistance of two different photoresistors at dark/light conditions , what would the controller’s voltmeter read if Sensor 1 was on white and Sensor 2 was on black? Assume each resistance reading has a precision of +/- 50
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PS4 - ENES 100 Introduction to Engineering Design Fall 2010...

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