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LumaDecoder

c0pperdragon edited this page Oct 6, 2026 · 5 revisions

External device to decode lumacode and create analog RGBS/RGsB/YPbPr. This is useful if you want to bring the signal from a lumacode-enabled computer directly to a CRT or other analog monitor.

sonic

Input ports

RCA jack to receive the lumacode signal. Micro-USB socket for power and firmware updates.

front

Output port

A DE-15 socket (same form as for VGA) to carry either RGBS, RGsB or YPbPr. You need to provide a suitable cable to go to your monitor. There are quite some ready-made options available to connect this to SCART, RCA, BNC, or DE-15 inputs.

back

Output modes

You can use the 3-way switch to chose one of the signal output options. The R/Pb, G/Y, B/Pb signals are available on pins 1, 2, 3 of the DE-15 socket. Composite sync is always available on pin 13 regardless of the mode. Pin 14 always provides 3.3V through a 100 ohm resistor and this can be used as signaling voltage when connecting to a SCART input.

Buttons

The two buttons let you cycle through the various supported lumacode types. With a long press, you open up the calibration menu for the current mode. Use short presses to move through options and long presses to start/stop modifiying the options.

Calibration

Due to manufacturing variances, you may have to tweak some of the parameters to receive the input signal without noise. These are a voltage

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