ECE 323L Basic Electronic Circuits Laboratory

Lab 6

 

 

Names:

 

 

 

Do the following exercises. Report your results by editing this Word document and submitting it in WebCT.

 

 

  1. Use resistor and capacitance substitution boxes to generate an RC circuit.

 

 

 

      Choose a value of capacitance in the middle range, 3-5 mF and a resistance about

10 kW. Adjust the oscilloscope to obtain a display similar to that shown below.

 

 

Display the rise and fall times on the measurement line.  Capture at least one image to include in your report.

 

Vary the resistance and record the rise and fall times. Pick at least five values from 10 kW to 100 W.  Plot rise or fall time vs. resistance and fit a straight line. The slope should be the capacitance and the x-intercept the frequency generator output resistance.

 

  1. Experiment with the capacitive light switch.  The manufacturer’s web page is www.touchnglow.com, but there is little/no technical content.  Sign the activity sheet at this station.

 

  1. Experiment with the stud sensor.  Read the description in “How a Stud Sensor Works.”  Sign the activity sheet at this station..

 

 

 

maintained by John Loomis, updated 11 February 2008