The PCBs were connected and tested with the ModuKey program which outputs serial data about pins being pressed. IO point 3 on board 5 was not responding. Visual inspection of the chip showed a questionable soldering job which was fixed with a soldering iron and a steady hand. The program confirmed that the pin, and all others on that board, were connected properly.
Once all the connections were confirmed in software, the directions on the board to "SOLDER SWITCHES LAST," was followed and forty switches were soldered by carefully holding a switch to the vias, adding solder, and letting go to solder the second hole. This was relatively easy, and after forty switches, was a well-learned skill.
After soldering every keyswitch, I found that the small boards with mounting holes on the inside were supposed to have a screw placed below the keyswitch first. Oops. The keyswitch was removed and resoldered with the screw in place.
Shrink tube between the 2x2 boards at the bottom of the keyboard was shrunk now that all the connections had been tested and keyswitches were added. The hot air soldering station was used to shrink the tubing. It had to be held far away and moved swiftly to avoid damaging the tubing.
The PCB at the top of the left side was meant to apply pressure to the IC, which may have been ill perceived cause and effect, but to give the option of applying pressure, the leads from the keyswitches were clipped short, almost flush with the board.
On the second half of the keyboard, the screw on the 2x2 board was inserted before the next round of forty-four switches were soldered in place. This half had four extra keys at the top of the wooden platform.
Nylon spacers were placed between the PCB boards and wooden boards to make clearance for the ICs, resistors, and keyswitch leads. Once assembled, it was a lot easier to move them around as a unit without the wired units flopping over all the time.
ModuKey on GitHub
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 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.
2018-11-14
IO 5,3 would not connect due to a loose pin
Once all the connections were confirmed in software, the directions on the board to "SOLDER SWITCHES LAST," was followed and forty switches were soldered by carefully holding a switch to the vias, adding solder, and letting go to solder the second hole. This was relatively easy, and after forty switches, was a well-learned skill.
Forty soldered switches
After soldering every keyswitch, I found that the small boards with mounting holes on the inside were supposed to have a screw placed below the keyswitch first. Oops. The keyswitch was removed and resoldered with the screw in place.
The screw was supposed to be inserted first
Shrink tube between the 2x2 boards at the bottom of the keyboard was shrunk now that all the connections had been tested and keyswitches were added. The hot air soldering station was used to shrink the tubing. It had to be held far away and moved swiftly to avoid damaging the tubing.
Satisfying shrink tube
The PCB at the top of the left side was meant to apply pressure to the IC, which may have been ill perceived cause and effect, but to give the option of applying pressure, the leads from the keyswitches were clipped short, almost flush with the board.
Clipping keyswitch leads short
On the second half of the keyboard, the screw on the 2x2 board was inserted before the next round of forty-four switches were soldered in place. This half had four extra keys at the top of the wooden platform.
Screw inserted first this time
Nylon spacers were placed between the PCB boards and wooden boards to make clearance for the ICs, resistors, and keyswitch leads. Once assembled, it was a lot easier to move them around as a unit without the wired units flopping over all the time.
Two keyboard halves populated
ModuKey on GitHub
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 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.
2018-11-14
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