I made a 3D model to hold an MDBT50Q-1MV2 module and pogo pins below it to carry power and data. The model was tall enough to hold all the pins and had holes below the pins I needed for programming. The center was hollow to save plastic, and the sides were furoughed to let me access the pins.
My resin printer struggled to print reliably. I estimated a 60% failure rate due to a broken screen. The first successful print had swollen holes, so I could not fit the pogo pins into it. I revised and managed another success, but the pins were so close that they will definitely short. My new plan is to add a tiny programming port to the final product.
I redesigned my board to remove the LEDs, replace the passive components with insertion-style components, and make it rectangular. It took a couple of tries to print a clean copy, but they came out neatly. I was waiting on copper boards to make the PCBs, and I noticed that I forgot to mirror the prints, so I will reprint them before producing a board at home.
The usual way I make circuits at home is to print the mirror image with a laser writer on the non-stick paper that comes with sticker sheets, use a clothing iron to transfer that toner to a copper-clad board, then remove the paper. I did not have an iron, so I used a glass-top range. It took several tries to get the technique right, but I found the most reliable process was to apply medium heat to the board for 30 seconds, press the printed paper onto the copper face for 15 seconds, then run it under hot water until the paper relaxed and released. I made several attempts before I got a good print.
Monsoon Wedding (2001) was one of Amanda's first picks, and most of us enjoyed it. The biggest problem was that Fred and this week's guest, Chad, watched versions that did not translate the Hindi into subtitles. Overall, we enjoyed the film and appreciated the characters, culture, and production.
The rest of the summary posts 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
Completed projects from year 11
Completed projects from year 12
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.
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| Printable jig for programming a MDBT50Q-1MV2 module |
My resin printer struggled to print reliably. I estimated a 60% failure rate due to a broken screen. The first successful print had swollen holes, so I could not fit the pogo pins into it. I revised and managed another success, but the pins were so close that they will definitely short. My new plan is to add a tiny programming port to the final product.
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| Unusable programming jig |
I started a design for the implant that included a USB connector port. Instead of soldering a physical port, I used four pads where I can attach a programming clamp. The MDBT50Q-1MV2 claims to support native USB, so I should only need 4 connections: V, G, D+, and D-.
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| Round board for a MDBT50Q-1MV2 |
I redesigned my board to remove the LEDs, replace the passive components with insertion-style components, and make it rectangular. It took a couple of tries to print a clean copy, but they came out neatly. I was waiting on copper boards to make the PCBs, and I noticed that I forgot to mirror the prints, so I will reprint them before producing a board at home.
 |
| Unmirrored prints |
The usual way I make circuits at home is to print the mirror image with a laser writer on the non-stick paper that comes with sticker sheets, use a clothing iron to transfer that toner to a copper-clad board, then remove the paper. I did not have an iron, so I used a glass-top range. It took several tries to get the technique right, but I found the most reliable process was to apply medium heat to the board for 30 seconds, press the printed paper onto the copper face for 15 seconds, then run it under hot water until the paper relaxed and released. I made several attempts before I got a good print.
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| The usable circuit is on the left |
Monsoon Wedding (2001) was one of Amanda's first picks, and most of us enjoyed it. The biggest problem was that Fred and this week's guest, Chad, watched versions that did not translate the Hindi into subtitles. Overall, we enjoyed the film and appreciated the characters, culture, and production.
Critical Affection: Monsoon Wedding (1:15)
The rest of the summary posts 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
Completed projects from year 11
Completed projects from year 12
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.
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