Abbott Analytical Products

Contents of Page

This web page contains working assumptions, a brief discussion about the audio oscilloscope, and a collection of helpful images with comments.

Working Assumptions

At this point in the project we assume

1> That the user has a working example of the ultrasonic speed gun in operation.
2> That the user has already download and installed one of the audio oscilloscope applications.
3>The user accepts the limitations (spedd, filtering, triggering events, etc.)of an audio oscilloscope

Extra Credit: Audion Oscillascope

The table given below contains helpful images and comments for using an audio Oscilloscpe to monitor execution of the Ultrasonic Speed Gun project.

Message Comment
High level layout for adding the audio oscilloscope to the Arduino/Base.
PC audio cable plug showing the TRS: Tip, Ring, and Shield.
The cut/stripped end of the PC audio cable. A continuity test should be performed to determine the actual wire that connects to the Tip and the actual wire that connects to the shield. It continuity testing can not be performed, try the clipping the audio wires based upon a guess. Then attempt a simple "no measurement" run. The results should be somewhat similar to the images given further below. If not then "switch" the connections of one end of both test clip cables.
A better view of the wires extending from the TRS male jack.
The PC Audio cable Shield wire is connected to one of the GND pins of the Base Shield Arduino. The connection could also be the made with a GND pin of the Arduino with causing an issue.
The PC Audio cable Tip wire is connected to D4 (Pin 5) of the Base Shield. The connection could also be the made with a Pin 5 of the Arduino with causing an issue.
Before the Ultrasonic Speed Gun program is started and ambient, inherent state shoulw be reflected by the audio oscilloscope.
As the applicaiton is starter and enters the Setup() function activity should rise on the audio oscilloscope.
The brief sounding of Happy Birthday will drive another display on the audio oscilloscope.
The Slow Siren abrupty alters the signal displayed on the audio oscilloscope.
The sending of the outbound sonic ping provides a unique display on the audio oscilloscope.
The retuning ping exhibits less dramatic profile on the audio oscilloscope.
The Fast Siren abrupty alters the audio oscilloscope display.
The audio oscilloscope shows a settling as the program transistion into termination.
Just before shutting down audio oscilloscope reflects the sounding of Shave & A Haircut interupting the ambient state of the applciaiton.

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Please send comments or questions using e-mail, voice telephone at 919-846-7705. (Last update: Feb 25, 2020 tar)