My first input switch still wouldn't behave, so I added a 10µF capacitor between the contacts to absorb some noise, but I don't think it helped. I also changed my default tempo to 60bpm and made it display at startup because before, I had to start at zero and press a button to start the display.
I got back into the problematic MIDI transmission and decided to unsolder all my leads and push them in place until something worked. To my surprise, when I disconnected the Vcc, and there was only one wire on the headphone adapter, I still saw a strong signal. Of course, there needs to be a complete path for electricity to flow, and I realized I mounted the power and serial lines to a metal box that provided a ground path. Since my bits were inverted, I needed logic-high, not ground as part of the circuit. I tested my hypothesis by soldering a headphone socket to a MIDI socket, and I got a usable signal.
Converter cobbled together
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.
2021-11-05
I got back into the problematic MIDI transmission and decided to unsolder all my leads and push them in place until something worked. To my surprise, when I disconnected the Vcc, and there was only one wire on the headphone adapter, I still saw a strong signal. Of course, there needs to be a complete path for electricity to flow, and I realized I mounted the power and serial lines to a metal box that provided a ground path. Since my bits were inverted, I needed logic-high, not ground as part of the circuit. I tested my hypothesis by soldering a headphone socket to a MIDI socket, and I got a usable signal.
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.
2021-11-05
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