The sound module selected for this project had a built-in battery for powering or charging a device so this board will be USB powered. A micro USB breakout board was an easy way to get power to the Arduino, but when a hole in the side was drilled to access the port, the bit ran into the connector and shredded the fragile part. It was foolish to cut while the component was installed.
It was the last breakout board of that size, and the mounting holes were already drilled, so another breakout board was sacrificed. No SMT micro USB pieces were stocked, or that would have been the best choice. The broken connector was removed, and the intact connector replaced it. This required a hot-air rework station.
Vcc and GND wires were run to all the devices that needed them. Each potentiometer needed a high and low while the switches only needed a GND wire. The system used sinking signals, so they wait for the line to go logical LOW. In this version, the controller provided a pull-up resistor, but in the next hardware revision, resistors will be installed.
Each operator needed a signal wire, and they were installed last. Each switch was wired with the normally open contact and common contact although one switch was accidentally wired to the normally closed terminal.
An Arduino Pro Mini was wired in. This controller was selected because many were stocked and they can be integrated into a project without any great cost of leaving it in place. The board did not have any headers soldered when it arrived so it was simple to go directly to the board which is also why no pull-up resistors were added.
In the depth of the enclosure, a MIDI DIN port was installed opposite a switch. The MIDI port would be for sending a signal out and the switch would prevent it from interfering with downloads. In other words, the switch would toggle between programming and operating.
Headers were added to the Arduino for programming. Two digital pins were left unpopulated for future additions. Two analog pins were left unpopulated for expansion and they were also the I2C pins so any number of devices can be added on the serial line.
The programming switch on the side took up too much room and interfered with face-mounted switches so a low-profile switch replaced it. This switch was meant for a 120V lamp so it was overkill and meant for AC but it will work well enough.
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
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.
2019-02-16
The micro USB port and a broken connector
It was the last breakout board of that size, and the mounting holes were already drilled, so another breakout board was sacrificed. No SMT micro USB pieces were stocked, or that would have been the best choice. The broken connector was removed, and the intact connector replaced it. This required a hot-air rework station.
Green is the broken connector
Vcc and GND wires were run to all the devices that needed them. Each potentiometer needed a high and low while the switches only needed a GND wire. The system used sinking signals, so they wait for the line to go logical LOW. In this version, the controller provided a pull-up resistor, but in the next hardware revision, resistors will be installed.
Switch and potentiometer wired up
Each operator needed a signal wire, and they were installed last. Each switch was wired with the normally open contact and common contact although one switch was accidentally wired to the normally closed terminal.
Wired operators
An Arduino Pro Mini was wired in. This controller was selected because many were stocked and they can be integrated into a project without any great cost of leaving it in place. The board did not have any headers soldered when it arrived so it was simple to go directly to the board which is also why no pull-up resistors were added.
Arduino connected to operators
In the depth of the enclosure, a MIDI DIN port was installed opposite a switch. The MIDI port would be for sending a signal out and the switch would prevent it from interfering with downloads. In other words, the switch would toggle between programming and operating.
Control on the left, communication on the right
Headers were added to the Arduino for programming. Two digital pins were left unpopulated for future additions. Two analog pins were left unpopulated for expansion and they were also the I2C pins so any number of devices can be added on the serial line.
Arduino sitting on a jumble of wires
The programming switch on the side took up too much room and interfered with face-mounted switches so a low-profile switch replaced it. This switch was meant for a 120V lamp so it was overkill and meant for AC but it will work well enough.
Low-profile programming switch
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
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.
2019-02-16
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