It was my first anniversary, and we wanted to celebrate with the traditional paper gifts. I made a blueprint-like drawing by drafting a hollow pi symbol (π) filled with relevant words. I added a couple of "tech notes": a snippet of pi and a note to my wife. I designed and printed an adapter to put a white pen into my vinyl cutter and wrote on blue paper, for a piece I am proud of.
I finished wiring the control facing to the microcontroller. There were ten signal wires and two power wires. I downloaded a testing program I wrote to test digital inputs and encoders. I updated the program to include analog inputs. One switch failed the test and needed a replacement.
I planned to solder up an octave, but I derailed my own plans after outfitting one of the prototyping PCBs with headers and resistors. My plans changed to preparing the boards, then I would move to the switches and lights another day. Each octave required 24 resistors, but I messed up one board and had to redo it, so I wound up soldering nearly 100.
I soldered the connections for one key, added the address jumpers, and connected the microcontroller. I carefully planned the pin arrangements for the key and drilled a hole at one end of the base to pass the wires, but I was ready for testing.
I had a list of troubleshooting to establish communication between the microcontroller and the I₂C IO expander boards. I added components, removed them, probed the data lines, plugged and unplugged modules, and finally checked that my wiring was correct, only to discover that the data lines were crossed. When I reversed them, communication started immediately, and I successfully implemented a demo program to read the switches and blink an LED filament.
Braxton Cosby came back to talk about The Last Samurai and the completion of his series, Yasuke, Japan's only black samurai. The movie had many problematic elements, and Braxton was not shy about discussing them.
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
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
Completed projects from year 12
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.
 |
| A couple of different blue sheets |
I finished wiring the control facing to the microcontroller. There were ten signal wires and two power wires. I downloaded a testing program I wrote to test digital inputs and encoders. I updated the program to include analog inputs. One switch failed the test and needed a replacement.
 |
| Testing the new wiring |
I planned to solder up an octave, but I derailed my own plans after outfitting one of the prototyping PCBs with headers and resistors. My plans changed to preparing the boards, then I would move to the switches and lights another day. Each octave required 24 resistors, but I messed up one board and had to redo it, so I wound up soldering nearly 100.
 |
| Three usable boards and a mistake |
I soldered the connections for one key, added the address jumpers, and connected the microcontroller. I carefully planned the pin arrangements for the key and drilled a hole at one end of the base to pass the wires, but I was ready for testing.
 |
| Underside of one octave with a wired key |
I had a list of troubleshooting to establish communication between the microcontroller and the I₂C IO expander boards. I added components, removed them, probed the data lines, plugged and unplugged modules, and finally checked that my wiring was correct, only to discover that the data lines were crossed. When I reversed them, communication started immediately, and I successfully implemented a demo program to read the switches and blink an LED filament.
 |
| Blinking a light and showing button feedback |
Braxton Cosby came back to talk about The Last Samurai and the completion of his series, Yasuke, Japan's only black samurai. The movie had many problematic elements, and Braxton was not shy about discussing them.
Critical Affection: The Last Samaurai (1:21)
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
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
Completed projects from year 11
Completed projects from year 12
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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