- In this activity, you:
- Measured the pushbutton and LED voltages with an oscilloscope
- Learned how the plotted data relates to what’s actually happening with the circuit voltages
- Studied start pulses, which are used in electronics to initiate communication and other events
- Used oscilloscope trigger settings to align that start pulse with a certain time to make the plot easier to view.
- Were you able to test the signal activity in the pushbutton and LED circuits?
- Do you understand the oscilloscope graph and how to manipulate the view of the information?
- Do you understand start pulses?
- Where can you find oscilloscopes used in real-world applications?
- What types of information might be contained in a start pulse?
- What happens to the oscilloscope graphs if the plotted line(s) runs off the right side?
- What is a trigger ‘edge’ and the default trigger voltage on the CYBERscope?
- Why is the black trace line connected to the pushbutton at 0 V when the pushbutton is not pressed?
- Why is the red trace line connected to the LED at 0 V when the pushbutton is not pressed?
- Adjust the volts on the graph so that the trigger edge will be 2 V. What change do you notice?
- Change the Your Turn program to evaluate the signal for the yellow LED. What do you observe?
- Modify the Your Turn script so that the LED stays on for 750 ms and off for 250 ms. What do you notice about the graph?