Mechanical Design

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

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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

• other components:
• DeLock 85462 0.25m USB A USB A Männlich Weiblich Schwarz USB Kabel, 85462
• USB-3.0-Verlängerungskabel, USB-3.0-Stecker-auf-Buchse-Adapterkabel mit Schraubpanelbefestigung für Industrie-Computer, 30 cm
• DeLock Kabel USB 3.0 A Stecker > USB 3.0 A Buchse zum Einbau 1 m

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)
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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.....

• ....and mounted the removable part of the VESA-Microphone-Stand-Adapter directly onto the ODROID-N2 heatsink

• VESA-Adapter: the "microphone-stand-part"

THE RESULT

• remark: the screws to hold the 2 parts of the housing together are not there

Assembly of standoffs / bumpers for desktop usage

Installation of a USB-Interface

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