I added a four-terminal RGB LED with a common anode to the system using more of the header wires. I considered addressable lights, but I won't need that much light, and I have bezels for the single components. I found some threshold values that could trigger with a breath and programmed the light to change accordingly.
I included a speaker with header terminals for testing, but I'll use piezo elements later. The startup sound is a 200 Hz square wave that builds to 700 Hz, then cuts off. Each time the Arduino sees a pressure event, it chirps for a fraction of a second and turns on the light. If there is a sustained pressure increase, it will flash the light and beep intermittently.
I put everything inside an airtight food container, so when I sealed it and pressed the lid, the light registered a significant pressure change and changed the light. The speaker was hard to hear inside the container, but it worked.
Pressure vessel
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2022-09-18
I included a speaker with header terminals for testing, but I'll use piezo elements later. The startup sound is a 200 Hz square wave that builds to 700 Hz, then cuts off. Each time the Arduino sees a pressure event, it chirps for a fraction of a second and turns on the light. If there is a sustained pressure increase, it will flash the light and beep intermittently.
I put everything inside an airtight food container, so when I sealed it and pressed the lid, the light registered a significant pressure change and changed the light. The speaker was hard to hear inside the container, but it worked.
The rest of the posts for this project have been arranged by date.
First time here?
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.
This blog, including pictures and text, is copyright to Brian McEvoy.
2022-09-18
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