Introduction to Engineering Camera Lab #4 – 2 Task #1 Agenda Overview of Camera Lab #4 Learn about operation of oscilloscope Review Task #1 Procedure Conduct Task #1

Camera Systems: Reverse Engineering Shutter:  Mechanical Flash:  Electrical Case:  Manufacturing & Materials

Overview of Camera Lab #4 Measure of voltage at different points in the circuit over time using an oscilloscope and voltmeter Watch the voltage change on the oscilloscope Record and analyze the data

Overview of Camera Lab #4 Task 1: Watch charge on the capacitor increase and note when the neon indicator light comes on Task 2: Watch the change in the voltage when the capacitor is discharged Task 3 (Optional): Use a voltage divider to measure flash trigger transient.

What’s an Oscilloscope? Instrument used to measure voltage Has two channels so you can measure voltage at two points in the circuit at the same time Has a display screen that shows a graph of voltage versus time

Oscilloscope cont… You can control the time scale on the horizontal axis of the display screen.  For example, one division might represent a second or a millisecond or some other time interval You can also control the vertical scale The oscilloscope will store the data You can use a pair of cursors to identify two points of interest on the graph and the oscilloscope will calculate and display the difference between those points.

Task #1 Procedure Summary Do “preliminary tasks: in Section 1.2 of the Camera Lab #4 procedure Follow the detailed steps under Task #1  Test box power switch OFF  Connect scope and DMM  Turn test box power switch ON  Gather data

Assignment Be sure all team members have the data from Task #1 before the class ends Make/check calculations for Task #1 Answer questions under Task #1 in “Report Instructions” Read Task 2 procedure