Drawing the keyboard levers up required ferrous material hanging off the back end. Ideally, I would have put the electromagnets right above a steel screw in each key, but there was not enough space. My attempt at this proved the concept would work with screws. Instead, I purchased picture hanging hardware since those were strips of steel with a brass coating.
I straightened plain picture hangers and used hot glue to stick them to the back of each key. They were light enough that they did not interfere with the operation or make them too heavy for the solenoids to pick up.
I wanted to test a couple of solenoids with switches. This situation comes up often enough that I built a test rig with five switches and screw terminals. For the sixth terminal, I added a common wire.
There was no trouble playing five keys from the switches. Clattering sound from the toy levers was distracting and, some of that might be absorbed with more foam.
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
Completed projects from year 6
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 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.
2019-12-10
Example and placement of picture hanging hardware
I straightened plain picture hangers and used hot glue to stick them to the back of each key. They were light enough that they did not interfere with the operation or make them too heavy for the solenoids to pick up.
Picture hangers glued to keys
I wanted to test a couple of solenoids with switches. This situation comes up often enough that I built a test rig with five switches and screw terminals. For the sixth terminal, I added a common wire.
Switchboard
There was no trouble playing five keys from the switches. Clattering sound from the toy levers was distracting and, some of that might be absorbed with more foam.
(0:21) Five playable notes
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
Completed projects from year 6
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 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.
2019-12-10
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