I saw an exciting technique for creating circuit boards. The gist is to buy pre-sensitized boards, place a mirror image of the circuit on the board, saturate the paper with baby oil to make it transparent, and expose it to UV light. The procedure seemed easy enough, and these PCB motors, which I would like to be able to process quickly, seemed like an excellent chance to test.
I cut a section of copper board, soaked a motor coil print with olive oil, and placed it in front of a UV flashlight for fifteen minutes. Judging by the paper's appearance, I should have soaked it in oil longer and pushed out the air bubbles.
UV exposure
I bought some lye-based (the main ingredient is sodium hydroxide) drain cleaner from the hardware store to develop the etch-resist layer. I had mixed results. I could see the green lines in the motor pattern, but they were too thin and overexposed on one side, and the opposite corner was underexposed. My first attempt failed, but it was enough to know that my olive oil worked all right, the traces should be thicker, and I needed better UV light dispersion.
Faint lines and dark edges
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
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
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 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.
2023-11-26
I cut a section of copper board, soaked a motor coil print with olive oil, and placed it in front of a UV flashlight for fifteen minutes. Judging by the paper's appearance, I should have soaked it in oil longer and pushed out the air bubbles.
I bought some lye-based (the main ingredient is sodium hydroxide) drain cleaner from the hardware store to develop the etch-resist layer. I had mixed results. I could see the green lines in the motor pattern, but they were too thin and overexposed on one side, and the opposite corner was underexposed. My first attempt failed, but it was enough to know that my olive oil worked all right, the traces should be thicker, and I needed better UV light dispersion.
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
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10
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 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.
2023-11-26
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