First generation boards arrived. These boards were designed before the first big revision, so they lack many of the features, like labeled pins, but they should allow most of the big bugs to be worked out. The simplest board was had space for various connectors for making remotes with the power and serial lines. An RJ11 connector was soldered to the board, but the footprint didn’t match perfectly. There was no surface-mount headphone plug but after looking, a surface-mount device would be a poor choice. The aviator plug hole was the wrong size so the hole will have to be expanded.
Switches were mounted to a few of the breakout boards so they could be used for testing. These did not have an IO expander onboard. They were given female header sockets so test wires could connect to them easily. After soldering, it was clear that switches should be soldered last since they can make it impossible to add headers.
When the boards were revised, the IO expander’s address pins changed from a set of three header pin holes to three pads identical to the surface-mount pads of the ICs used. A few of the pads were soldered together with a hand iron in order to test the feasibility of setting the addresses by anyone with a soldering iron. The results were good and with only a fine-tip soldering iron, it was possible to solder adjoining pins together without unwanted bridges. No magnification was used either.
ICs were soldered to some of the boards. No solder paste was available so thin electrical solder was used. A few boards and chips were ruined because of improper tools. One board was completely assembled with an IC and switches. Two others were only given an IC to test if they can talk to a microcontroller.
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.
Disclaimer for http://24hourengineer.blogspot.com/ and http://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.
2018-03-17
Measuring the aviator plug chassis-mount device
Mounted RJ-11 socket
Switches were mounted to a few of the breakout boards so they could be used for testing. These did not have an IO expander onboard. They were given female header sockets so test wires could connect to them easily. After soldering, it was clear that switches should be soldered last since they can make it impossible to add headers.
Switches soldered to 2x2 and 1x2 breakout boards
When the boards were revised, the IO expander’s address pins changed from a set of three header pin holes to three pads identical to the surface-mount pads of the ICs used. A few of the pads were soldered together with a hand iron in order to test the feasibility of setting the addresses by anyone with a soldering iron. The results were good and with only a fine-tip soldering iron, it was possible to solder adjoining pins together without unwanted bridges. No magnification was used either.
Intentionally bridged pins
ICs were soldered to some of the boards. No solder paste was available so thin electrical solder was used. A few boards and chips were ruined because of improper tools. One board was completely assembled with an IC and switches. Two others were only given an IC to test if they can talk to a microcontroller.
ICs soldered to boards
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.
Disclaimer for http://24hourengineer.blogspot.com/ and http://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.
2018-03-17
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