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  • Re: Control of Beovision 7-40 floor stand

    Thanks for that! I see they modulate 4 signals on two wires with a voltage level. Lower voltages at 2.5V control the tilt, higher voltages at 5V control the rotation. Should not be a problem, just requires some voltage drivers after the GPIO outputs.
    Posted to The Workbench (Forum) by drmichi on Wed, Aug 21 2019
  • Re: Control of Beovision 7-40 floor stand

    Mechanically it's done, except the cable routing. Next task is to attach an Oscilloscope and analyze how to control tilt / rotate with that 5 plug wire. Since the BV7-40 still works, I think I will be able to find a pattern how to control the stand through a NodeMCU. To get the BeoLab 7-4 working, I plan to use the "Stereo MiniJack with USB Trigger cable". https://www.av-connection.de/?PGr=6497
    Posted to The Workbench (Forum) by drmichi on Tue, Aug 20 2019
  • Re: Control of Beovision 7-40 floor stand

    I have the motorised floor stand of the old BV7-40 MKII, and a 55" Samsung LCD TV. The Samsung TV will be attached through a self made adapter plate The BeoLab 7-4 will be connected through the "TV Digital Optical Out -> Analog Stereo Converter -> PowerLink Adapter Cable" . I would like to control the floor stand from a NodeMCU V3 micro-controller, which is attached to the USB port of the TV and a separate power supply. When TV is starting up, the NodeMCU detects USB power and
    Posted to The Workbench (Forum) by drmichi on Wed, Aug 14 2019
  • Re: Control of Beovision 7-40 floor stand

    According to the service manual, there is the following pin assigment: Pin1: GND Pin2: Turn left Pin3: Turn right Pin4: (?) current position? Pin5: +14V Does anyone know which pin is which one on connector?
    Posted to The Workbench (Forum) by drmichi on Tue, Aug 13 2019
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