Page 58 - The Basics IA by ETron Circuit Labs

ETron Circuit LabsLab 29Morse Code OscillatorObjective:In this Lab you will build a Morse Code Oscillator that will produce a tone pulse each time a switch is pressed.Step 1 – Take InventoryUsing the Parts Inventory as shown on the right under the “Here’s What You’ll Need” section, place each part needed for this experiment on its corresponding drawing. Observe the schematic symbol for each part. Make sure that you have all the parts ready before you begin Step 2.Step 2 – Build the CircuitUsing the Schematic Diagram and the picture of the completed lab, build the lab experiment with the electronic components. Use the “Check Your Work Here” Box to verify that your wiring is correct, and then proceed to Step 3.Step 3 – Do ExperimentTheory:In this Lab, you will use the 555 Timer IC as a source of pulses which are sent to a transistor which drives a speaker. R1, R2, and C1 control the frequency of the pulses. Use this formula to get the frequency of the pulses coming from Pin 3 of the 555 Timer IC.56