I checked Amazon for any DTMF decoders with a microphone, but they used line-level inputs. I sketched the circuit for my DTMF decoder and microphone, but I swapped the 5-volt USB power supply for a 6-volt AA battery pack because it had a built-in switch and was large enough to Velcro a prototyping board to the lid.
I added 1KΩ resistors between the decoder module and LEDs, even though the output was probably not enough to burn up one of the lights. I did not bother using CAD for the drawing because it was simple.
DTMF decoder for ambient detection
I assembled the components on a prototyping PCB and soldered everything together. I powered the unit up and tested it again. The chip could not recognize every signal as well as the app, but it was remarkably responsive, so I consider this a great success.
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
Completed projects from year 9
Completed projects from year 10
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.
2023-10-
I added 1KΩ resistors between the decoder module and LEDs, even though the output was probably not enough to burn up one of the lights. I did not bother using CAD for the drawing because it was simple.
I assembled the components on a prototyping PCB and soldered everything together. I powered the unit up and tested it again. The chip could not recognize every signal as well as the app, but it was remarkably responsive, so I consider this a great success.
(0:02) Lights change with pitches
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
Completed projects from year 9
Completed projects from year 10
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.
2023-10-
Comments
Post a Comment