While I wait to hear from tech support about my printer, I can work on the control electronics. For starters, I will control power to the solenoids with mechanical relays. Eight-relay modules exist, and I had a couple of them in stock. The click of the relays may be distracting, which may necessitate switching to a solid-state relay bank in the future. An Arduino mounted right on the relay bank pins, except a wire for Vcc, which ran separately.
On the contact side of the module, I daisy-chained a power line to the common terminal of each relay. I added a different wire to the normally-open terminals. One of the terminal screws stripped, so I soldered a jumper between the normally-closed terminal and common so all the wires could land under a screw post. I put a snug layer of shrink tube over everything, but this was a mistake because I did not add a ground wire to the bundle.
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.
2019-11-30
Arduino with soldered header sockets
On the contact side of the module, I daisy-chained a power line to the common terminal of each relay. I added a different wire to the normally-open terminals. One of the terminal screws stripped, so I soldered a jumper between the normally-closed terminal and common so all the wires could land under a screw post. I put a snug layer of shrink tube over everything, but this was a mistake because I did not add a ground wire to the bundle.
Power wires and ill-advised shrink tube
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.
2019-11-30
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