There was some worry about how to make typing as functional as a commercial keyboard but it became clear after looking at the HID keyboard page at pjrc.com which explained how to make each input act as a keyboard button. The first example keyboard was fully functional. All the buttons acted as expected, all the modifier keys worked exactly as they should, and key repeated worked through the OS.
Up to six keys can be held simultaneously plus all four modifier keys can be recognized independantly. These keypresses didn't interfere with the other keyboards connected to the computer. When the laptop's built-in keyboard, a full-size mechanical keyboard, and this were connected, all three operated independantly so holding shift anywhere caused capital letters to be typed on all keyboards. Key repetition could type three letters in sequence just by holding the keys.
The on-board light of the Teensy was programmed to flash at startup as well as whenever a key was held. This will be commented out but left in place. The effect was not too distracting and mostly good for debugging. It simply turned on the light when any key was pressed and turned it off when any key was released.
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
Disclaimer for http://24hourengineer.blogspot.com/
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in 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.
2018-04-02
Up to six keys can be held simultaneously plus all four modifier keys can be recognized independantly. These keypresses didn't interfere with the other keyboards connected to the computer. When the laptop's built-in keyboard, a full-size mechanical keyboard, and this were connected, all three operated independantly so holding shift anywhere caused capital letters to be typed on all keyboards. Key repetition could type three letters in sequence just by holding the keys.
The on-board light of the Teensy was programmed to flash at startup as well as whenever a key was held. This will be commented out but left in place. The effect was not too distracting and mostly good for debugging. It simply turned on the light when any key was pressed and turned it off when any key was released.
Playing with the keyboard and light
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
Disclaimer for http://24hourengineer.blogspot.com/
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in 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.
2018-04-02
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