Whenever someone asks about my music projects, I have to show them pictures or a video because I did not have a portable demonstration unit. The biggest problems were carrying a synthesizer and a speaker. The cleanest solution I could devise was a unit that connected to my phone, using a MIDI synth and the phone's speakers. If I wanted to get louder, I could connect the phone to an amplifier. I sketched a device that would hold to the back of my phone via the MagSafe ring. It had six encoders, two switches, some LEDs, and a screen. The device connects to the computer via USB-C, and the controller also supports Bluetooth. I did not intend this for wireless operation. Each encoder has one or two functions, and I can access the alternative function by holding the knob down.
The device will play a single melody track and the percussion channel. In case I use a synth that does not support percussion on channel 10, I will disable it by default. Even though it was being designed for a phone, I want it to be compatible with any MIDI synth. I plan to make a custom circuit board with a socket for an ESP32 demo board with an integrated screen. The whole look should be a bare-bones custom circuit with an afterthought to decoration and a focus on functionality.
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
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.
2026-06-26
The device will play a single melody track and the percussion channel. In case I use a synth that does not support percussion on channel 10, I will disable it by default. Even though it was being designed for a phone, I want it to be compatible with any MIDI synth. I plan to make a custom circuit board with a socket for an ESP32 demo board with an integrated screen. The whole look should be a bare-bones custom circuit with an afterthought to decoration and a focus on functionality.
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| EWC_Mobile sketch and circuit |
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
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.
2026-06-26
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