To complete the picture, it looks like darry was right, the VGA2HDMI1 is identical in construction to the CYP SY-P293. Here a picture of my SY-P293...

Okay, so build it yourself! 😀

Many thanks for the answer! :) But would such a circuit solve my problem of the voltage offset? I can relatively easily adjust the resistors so that the optoisolator gets enough current. This should be at the usual 5 mA. I thought that my problem is the voltage difference and as a result the signals …

Hello everybody! Not sure if the question has been discussed here yet, but I can't find anything. It's about the Gameport/MIDI interface of the Soundblaster PCI cards. I know there is no working Dos driver. But should the MIDI-Out work under Windows? I can't get an external MIDI synth to accept the …