Since I am making a MIDI controller, all the neat controllers pop out and this one had variety and it looked fascinating. There was a laser harp, rotary potentiometers, linear potentiometers, arcade buttons, and a touch piano in a laser cut enclosure.
This feature started with an uncommon, even silly, question. Folks kept asking these magnet retailers if magnets were a suitable replacement for laundry detergent. Most people would instantly dismiss the question but testing showed evidence that detergent cleaned better and magnets had no more effect than a control batch. The important thing is that citizen scientists created a repeatable process and produced data rather than dismissing the question.
MIDI input kept moving forward I added an optocoupler circuit based on the examples I found online. Instead of an ordinary diode before the coupler, an LED was swapped in its place. In order to test everything, the components were added dead-bug style where the parts were allowed to hang in free-space.
It seemed like the optocoupler circuit worked well so it was installed neatly on the controller breakout board. I was worried that there might be some issues with height clearance, but nothing was close to interfering. Testing showed that all incoming data was nonsense.
Data was not decoding properly so the optocoupler was removed. When the data was seen at the bit level nothing made sense. It was supposed to be ascending note by note but it did not change that way. The first three bits in the image below, where the note was transmitted, were inverted. As soon as the zeros and ones were imagined as their opposite, they were incrementing bit by bit.
The optocoupler circuit inverted the incoming bits, like a NOT gate, so it had to be added back to the project. This time the circuitry was added to a separate board which connected with screw terminals so it could be swapped in the future if necessary.
The rest of the summary posts 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
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.
This feature started with an uncommon, even silly, question. Folks kept asking these magnet retailers if magnets were a suitable replacement for laundry detergent. Most people would instantly dismiss the question but testing showed evidence that detergent cleaned better and magnets had no more effect than a control batch. The important thing is that citizen scientists created a repeatable process and produced data rather than dismissing the question.
MIDI input kept moving forward I added an optocoupler circuit based on the examples I found online. Instead of an ordinary diode before the coupler, an LED was swapped in its place. In order to test everything, the components were added dead-bug style where the parts were allowed to hang in free-space.
Dead-bug optocoupler
It seemed like the optocoupler circuit worked well so it was installed neatly on the controller breakout board. I was worried that there might be some issues with height clearance, but nothing was close to interfering. Testing showed that all incoming data was nonsense.
Optocoupler properly installed
Data was not decoding properly so the optocoupler was removed. When the data was seen at the bit level nothing made sense. It was supposed to be ascending note by note but it did not change that way. The first three bits in the image below, where the note was transmitted, were inverted. As soon as the zeros and ones were imagined as their opposite, they were incrementing bit by bit.
Inverted bits
The optocoupler circuit inverted the incoming bits, like a NOT gate, so it had to be added back to the project. This time the circuitry was added to a separate board which connected with screw terminals so it could be swapped in the future if necessary.
Incoming MIDI interface board
The rest of the summary posts 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
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.
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