Mechanical Design

> Main Page > Piano Expander based on Pianoteq and Odroid-N2

Partslist of the used components

Remark: Some of the components used here seem to be very strange because they may be not available anymore on the market. The reason why I have used those components is very simple - I have just found them in my stock. Please feel free to use other components....
The following components are used on my "prototype":

Count	Part	Cost	e.g. available at...	Remark
1	Odroid-N2	80,- Euro	Pollin: Odroid-N2
1	16GB eMMC Module N2 Linux	23,- Euro	Pollin: ODROID-N2 eMMC Modul, 16GB, mit Linux
1	Odroid Backup Battery	4,- Euro	Pollin: ODROID BACKUP BATTERY
1	Odroid-N2 VESA Mount-Kit	4,25 Euro	Pollin: ODROID-N2 VESA-Mount-Kit	By using the Odroid-N2 mount kit it is possible to mount it on such an adapter
1	Joy-IT LCD10	140,-Euro		was cheaper in the past

1x DeLock 82697 Cable USB 2.0 Micro-B male 2x open wires power 10cm (power for Touch-Display)
1x StarTech UUSBHAU1LA  1ft. /30cm Micro USB Cable - A to Left Angle Micro-B (Data cable for Touch)
1x RND Electronics RND 455-00355 Flat plastic enclosure ABS IP 65
2x ELV Low-voltage-headphone-amplifiers based on MAX4409
2x Analog Device SSM2142 Balanced Line Drivers for symmetrical 
    audio output on XLR connectors
3x Elektor MIDI Breakout-Boards (MIDI-BoBs PCB No. 190070-1), 
    (1x configured for MIDI-IN, 1x configured for MIDI-THRU and 1x configured for MIDI-OUT
1x Notebook-Style desktop-power-supply with 12V/2A and 5V/2A (formaly used for an 
    external 5 1/4 inch HDD-case)
....
....
more coming soon

Used Power-Supply

I've found a desktop-power supply which was originaI used for an external 5 1/4 inch hard-drive. It provides 12V / 2A and 5V / 2A thus exactly what is neede for the piano expander.
5V / 2A for the Joy-It Touch-Display
12V / 2A for the Odroid-N2

The connector which was used on this power-supply was a Mini-DIN4 Power Plug (PP).

Picture Gallery

Mounting the Touch-Display into the housing

View onto the Touch-Display electronics

Backside of the Housing with mounted Odroid-N2 module

Rear-Side of the housing without the breakout for the Odroid-N2 module

Rear-Side of the housing with the mounted Odroid-N2 module

Fastening the Odroid-N2 module in the housing

Position of the MIDI-Breakout-Boards

Rear-View

Side-View

Cut-away view

Piano-Expander Rear-View

Power-Socket and MIDI-Breakout-Boards mounted into the housing

Headphone-Amplifiers mounted into the housing

Fold apart

mounting VESA-Adapter onto the Piano-Expander

as you can see on the picture below the Odroid-N2 has 4 holes on its heatsink for mounting the optional Odroid-N2-Vesa-Mount-Kit.
Don't waste money while buying the old Odroid-N2 VESA bracket. This Bracket is not compatible with the VESA mounting hole dimensions (neighter 100x100mm nor 75mm x 75mm).

The solution for me was "just mounting the VESA-Adapter for a microphone-stand directly onto the Odroid-N2 heatsink"
I screwed 4x 12mm M3 standoffs into the heatsink.....