Three different sized boards were assembled with ICs, keyswitches and a pullup resistor on the RESET pin. All three boards were assembled from the first batch of circuit boards so the next version will already have spots for pull-up resistors on the RESET pin as well as all the inputs.
Links between the boards were an easy matter because of the header arrangement. Four short jumpers to each IO board were added at the right locations. This will be easier on the next generation of board which have the holes labeled. Leads from a trimmed resistor were bent into shape for the purpose.
A wooden base was made for the keyboard. It was laser cut so it would match the exact alignment of the boards and it could be installed with ordinary wood screws. The fit was perfect the first time. It was made nine units wide so this may be an unusual size. It was the minimum size to make a functional typing keyboard for one hand.
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.
2018-03-31
RESET pins held high with IMT resistors
Links between the boards were an easy matter because of the header arrangement. Four short jumpers to each IO board were added at the right locations. This will be easier on the next generation of board which have the holes labeled. Leads from a trimmed resistor were bent into shape for the purpose.
Soldering four leads between boards
A wooden base was made for the keyboard. It was laser cut so it would match the exact alignment of the boards and it could be installed with ordinary wood screws. The fit was perfect the first time. It was made nine units wide so this may be an unusual size. It was the minimum size to make a functional typing keyboard for one hand.
PCBs installed on a wooden base
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.
2018-03-31
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