I had some inexpensive reed switches in my inventory, so I tested one to make sure it would work. The reed switch will detect a magnet attached to the cylinder and alert the controller that it is in the HOME position. On any makeshift encoder, this is probably a good idea.
After testing the switch, I bent one of the leads around, and it promptly broke the glass. Reed switches use hermetically sealed glass cylinders with iron contacts that attract to one another in the presence of a magnet, and the gas inside keeps the iron from oxidizing. To protect the switches, I potted a pair of them inside a drinking straw and filled it with E6000 adhesive.
The two switches will be wired in parallel so that as long as one of them sees a magnet, the circuit will conduct. This could reduce bouncing and will provide redundancy. If one of the switches breaks and causes a short, it will have to be eliminated.
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.
2019-08-23
Testing reed switch
After testing the switch, I bent one of the leads around, and it promptly broke the glass. Reed switches use hermetically sealed glass cylinders with iron contacts that attract to one another in the presence of a magnet, and the gas inside keeps the iron from oxidizing. To protect the switches, I potted a pair of them inside a drinking straw and filled it with E6000 adhesive.
The two switches will be wired in parallel so that as long as one of them sees a magnet, the circuit will conduct. This could reduce bouncing and will provide redundancy. If one of the switches breaks and causes a short, it will have to be eliminated.
Making a reed switch assembly
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.
2019-08-23
Comments
Post a Comment