ECE 323L Basic Electronic Circuits Laboratory

Lab 5

 

 

Name:

 

 

 

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

 

 

  1. Build a circuit that flashes an LED on and off.  Use a 555 timer for this circuit. Start with C = 1 mF, R1 = 1kW, and R2 = 220 kW.  You may leave pin 5 disconnected. Demonstrate your circuit to the instructor or teaching assistant.

 

 

 

 

  1. Connect your circuit to an oscilloscope and measure the frequency. Capture an oscilloscope image, showing the measured frequency, and include it in your report.  Enter the measured frequency below:

 

 

Frequency

 

 

 

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maintained by John Loomis, updated 3 Feb 2008