My Arduino sketch wasn't working due to floating terminals. I found that
the diodes were installed backward for my outputs. I couldn't use
built-in pullup resistors, but pulldown resistors helped me read the
channels clearly. I'll try again with the new setup.
Care Bear Keyboard needs more components
I added pulldown resistors and linked them. I used Kapton tape and made a USB extension. I can read serial data, but only one key per column. I attached summer-themed keycaps.
Revised and working circuit
I created a debouncing function for the diode matrix array. After fixing some collating code, I was able to recognize rising edges and remove delays. The resulting report is clean and displays each keypress as a two-digit number. I used alt-codes to type symbols and made sure the escape key releases any stuck keys. The keyboard is complete.
I returned to the focus of KeyBoardolier, a wearable keyboard, and sketched the new components on a drawing tablet. When I considered the workload, I decided to eliminate the musical portion of the project to see if I even liked a wearable QWERTY keyboard first.
Measurements
I installed keyswitches onto the keyboard, then added diodes and copper wire. I should have used a vertical bus, but I added wire stubs so the diodes could reach their neighbors until I switched to longer components.
Underside soldering job
I drafted an Arduino Feather outline and placed it near the edge, but it may affect the offhand keys. I got an IO expander module to avoid relying on the onboard IO. Also, I created an LED cluster and power switch. I plan to stack strips to fill the gap and add wooden washers to ventilate the inside.
Extension parts
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
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.
I added pulldown resistors and linked them. I used Kapton tape and made a USB extension. I can read serial data, but only one key per column. I attached summer-themed keycaps.
I created a debouncing function for the diode matrix array. After fixing some collating code, I was able to recognize rising edges and remove delays. The resulting report is clean and displays each keypress as a two-digit number. I used alt-codes to type symbols and made sure the escape key releases any stuck keys. The keyboard is complete.
I returned to the focus of KeyBoardolier, a wearable keyboard, and sketched the new components on a drawing tablet. When I considered the workload, I decided to eliminate the musical portion of the project to see if I even liked a wearable QWERTY keyboard first.
I installed keyswitches onto the keyboard, then added diodes and copper wire. I should have used a vertical bus, but I added wire stubs so the diodes could reach their neighbors until I switched to longer components.
I drafted an Arduino Feather outline and placed it near the edge, but it may affect the offhand keys. I got an IO expander module to avoid relying on the onboard IO. Also, I created an LED cluster and power switch. I plan to stack strips to fill the gap and add wooden washers to ventilate the inside.
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
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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