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Old 2nd August 2015, 08:56 PM   #1
sonnya is offline sonnya  Denmark
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Default Frontpanel with OLED display for DIY audio projects

Hi.

We have earlier in the AK4490 USB DAC thread on the vendor bazar been talking about a frontpanel for the DAC. Some mentioned it could be usefull for other products as well.

So here it is taking shape.

Some of the highlights is:
  • 140x60mm PCB
  • New heaven display - nhd-2.8-25664ucb2 - OLED blue 256x64 pixels
  • 4 buttons, high quality - We provide caps in aluminium as well
  • 6 pole IDC connector for use with bourns EM14A0D encoder with 32/64/128 pulses per rev.
  • 10 pol IDC connector for AK4490 USB DAC frontpanel connector
  • 2 pol header for 5V - 15VDC supply to the front.
  • 20 pol IDC connector for General purpose connection - 3V logic
  • IR receiver for NEC remote (apple remote)
  • Controller is an Cortex M0 based ATSAMD20J18 from atmel.
  • Bootloader installed for firmware upgrade.
  • 3 pole molex header for RS232 for firmware upgrade. - Could be FTDI USB to serial bridge module

An nice thing about this panel is that users or customers can program the panel itself using Atmelstudio + Atmel ice 3. Atmel studio is free and the ATATMEL-ICE-BASIC is available for 54USD from Atmel.

The general purpose connector is 3V logic but we can provide breakout board with level converters for 3 - 5VDC logic level.

Potential customers will get access to the schematic of the board.

Together with CAPS for the buttons we are working on a frontpanel, most likely in 8mm aluminium ..

The 1 unit price is 144€.

The early bird price of this one is 124€.

The frontpanel will be ordered 3.08.15 (just in a moment)
Attached Images
File Type: jpg 4acfea61de80f5d623de47d36683bf7b.jpg (227.2 KB, 527 views)
Attached Files
File Type: pdf frontpanel 020815 top+bottom silkscreen.pdf (17.5 KB, 59 views)
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Last edited by sonnya; 5th August 2015 at 08:37 AM.
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Old 2nd August 2015, 10:58 PM   #2
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It would be great if the height can narrow to 50mm. Mostly, the box for DAC or Preamp is less than 70mm in height.
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Old 3rd August 2015, 07:51 AM   #3
sonnya is offline sonnya  Denmark
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Quote:
Originally Posted by rogerchou View Post
It would be great if the height can narrow to 50mm. Mostly, the box for DAC or Preamp is less than 70mm in height.
I will reduce the height. It is not a problem for me.



BR

Sonny
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Old 4th August 2015, 01:43 AM   #4
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Sonny, thank you. Is it compatible with your preamp design?
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Old 4th August 2015, 05:28 AM   #5
sonnya is offline sonnya  Denmark
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Hello

Rogerchou.

it is compatible with my dac and preamp.

BR

Sonny
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Old 4th August 2015, 10:28 AM   #6
pdb is offline pdb  Denmark
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Neat. How long will you offer the 10$ early bird discount on this kit?
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Old 4th August 2015, 10:49 AM   #7
sonnya is offline sonnya  Denmark
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Pictures - 140x50mm black soldermask.
Attached Images
File Type: png frontpanel - front.png (48.8 KB, 376 views)
File Type: png frontpanel - back.png (75.8 KB, 355 views)
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Old 5th August 2015, 08:39 AM   #8
sonnya is offline sonnya  Denmark
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Quote:
Originally Posted by pdb View Post
Neat. How long will you offer the 10$ early bird discount on this kit?
Until the 14. august 2015.

Please observe that the price has gone down by 10€.

So Normal price is 134€ and early bird is 124€.

It is due to the fact that the PCB is an 2 layer board instead of 4 layer which was planed first, but after routing i could see it was not necessary with 4 layer board.

BR

Sonny
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Old 6th August 2015, 08:09 PM   #9
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Sonny, are the 4 aluminum buttons for volume control and filter selection? encoder is optional?
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Old 6th August 2015, 08:22 PM   #10
sonnya is offline sonnya  Denmark
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Quote:
Originally Posted by rogerchou View Post
Sonny, are the 4 aluminum buttons for volume control and filter selection? encoder is optional?
In case of preamp with buttons only, the two left buttons are for volume, third from left is channel,

The most right button is menu selection. In menu mode the volume buttons are +/- Scroll up/down, channel select button is escape, and right button is menu enter/save.

The encoder is optional. it is an EM14A0D which is very very nice but also very expensive i have decided to supply the PCB only for an start.

At digikey this encoder cost 31€ but it is worth every cent....

With encoder volume control gets placed on the encoder instead, making the interface better for the user.

Encoders | Sensors, Transducers | DigiKey
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Last edited by sonnya; 6th August 2015 at 08:34 PM. Reason: Forgot comment about encoder....
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