I thought I would be constructing the automation portion by adding custom mallets to hobby servo motors. Still, I have an opportunity to make an instrument where the keys will appear the press themselves like an old player piano. The trick will be to install solenoids inside the enclosure. This method will still permit someone to play the glockenspiel with the keys.
A 12V supply was handy so I removed the coil and core from an open relay to try to get a small metal screw to jump at the steel core. One problem was that the coil was intended to run on 24V and it was only supposed to have enough power to draw a spring-loaded carriage, not attract metal from a distance.
My next subject was a rotary solenoid. The rotation might have made it easy to move levers, but it was another 24V device, and even with some finger pressure, I could not get usable movement.
While I was at the surplus store shopping for solenoids, I saw some small electromagnets with no markings. They were inexpensive, so I bought some in the hope they would work, and they had no trouble making a screw jump to the core when I applied 12V.
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.
2019-11-23
A 12V supply was handy so I removed the coil and core from an open relay to try to get a small metal screw to jump at the steel core. One problem was that the coil was intended to run on 24V and it was only supposed to have enough power to draw a spring-loaded carriage, not attract metal from a distance.
Insufficient lifting power at 12V
My next subject was a rotary solenoid. The rotation might have made it easy to move levers, but it was another 24V device, and even with some finger pressure, I could not get usable movement.
No movement from rotary solenoid at 12V
While I was at the surplus store shopping for solenoids, I saw some small electromagnets with no markings. They were inexpensive, so I bought some in the hope they would work, and they had no trouble making a screw jump to the core when I applied 12V.
Effective magnetic strength
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.
2019-11-23
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