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This is a first rough cut of an Arduino library for the IKEA FREKVENS LED panels developed jointly with Teenage Engineering.

Contributions welcome.

Arduino requirements: Must be type with 3.3V logic levels. If you want to try hooking this up through 8-bit 5V AVR antiques like an Arduino Uno, then you must use level shifters.

Recommendation: Use Teensy 3+, Adafruit Feather M0 or Sparkfun SAMD21 mini breakouts. Should also work with 32U4 based boards as well, so long as they're 3.3V. Haven't tried with ESP8266 yet.

Library dependencies:

  • Adafruit GFX library must be installed.

Soldering instructions:

  • Open & disassemble the LED cube.

  • Extract the mainboard.

  • Desolder the original controller daughterboard (green color).

    • Use flux and solder wick.
  • Attach wires to the six solder points.

    • The outermost solder points are marked VCC and GND.

    • Let GND be (1) and VCC be (6). The middle four are as follows:

    • (2) LATCH - connect to a digital output pin.

    • (3) CLOCK - connect to a digital output pin.

    • (4) DATA - connect to a digital output pin.

    • (5) !ENABLE. This one is optional. If you DON'T need to be able to control brightness of the display, then just solder a wire from this pin to GND. If you DO want to control brightness, then connect this pin to a PWM ("analog") output pin on your Arduino.

    • Solder the GND wire to a GND pin on the Arduino.

    • Leave the VCC wire unconnected until you're done programming

    • The VCC wire has 4 volts on it coming from the isolated power

    • supply of the Frekvens cube.

    • While programming, the Arduino should be powered through USB.

    • After programming, disconnect USB cable and attach VCC wire

    • from Frekvens panel to battery input or "USB" voltage pin on

    • the Arduino. The Frekvens panel will now supply the Arduino

    • board voltages.

  • Optionally - hook up the red and yellow buttons on the back.

    • RED wire is common so connect this to GND or VCC of the
    • Arduino. BLACK wire is RED button, WHITE wire is YELLOW button.
  • Put the whole thing back together.

  • To use the library, add #include "Frekvenspanel.h" statement, and instantiate a FrekvensPanel object. See examples.

  • Library has several un-documented experimental modes, including multiple bit planes (intensity dithering) and support for daisy- chaining several modules. Needs more work. At the moment the daisy- chain is mapped vertically which seems wrong.

  • Happy hacking

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Arduino library for playing with IKEA Frekvens LED panel

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