Page 30 - The Basics IA by ETron Circuit Labs

ETron Circuit LabsControl 5Threshold 6 3 Output Discharge 7 2 Trigger4 ResetVcc Positive 81 GroundLab 15555 Integrated CircuitObjective:In this Lab you will build a simple circuit to observe the operation of 555 Timer IC as an astable multivibrator.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:The 555 Timer IC is commonly used as an astable (or free-running) multivibrator. Astable or free-running means that it will continue putting out pulses until you remove the power.The 555 Timer IC is a two-state device, which means its output (Pin 3) can only be HI or LO. Its state, HI or28555