RGB to hdmi video adapter

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The Aquarius RGB to HDMI Adapter Board will be an after-market upgrade to the stock Aquarius that replaces the original RF modulator with a high quality, high resolution output solution. For now, there is no AUDIO output via HDMI, so a separate HDMI Audio Inserter must be used OR a standalone pair of desktop speakers.


After I completed the Aquarius Composite Video Adapter, I decided the next step was to try to improve the output from the Aquarius to display on monitors that separated the RGB signals for higher quality signal. I began reviewing older posts from Bruce Abbott on the forums, and found that he had developed a working model in 2014. It had a few problems, namely that characters with full-height pixels in them would render with a faint vertical bar on their left side. He resolved this issue later in about 2017 by adding a 74LS165 shift register on the INPUT side... dubbed the V4+ it included both RGB and composite out through a custom DIN connector. That effort was progressing SLOWLY and unfruitfully. I even went so far as to have a set of prototype PCBs made, to no avail.

One day a video for the Amiga RGBtoHDMI adapter came across my YouTube feed. I traced the sources back to Hoglet67's RGBtoHDMI project, which uses a RaspberryPi Zero with a custom Pi Hat with a CPLD that samples video pulses from legacy RGB video sources and renders them into the Pi's graphics buffer and out through the mini-HDMI port. I had a set of their boards printed, sourced the parts, made the SMD solder mask, and built one. And it worked!

Status (19 APR 2021)

First prototype (v1.0a) successfully installed in a client's machine. Updates/tweaks will be made in v1.0b, but existing boards will be used until they are gone.

Issues (19 APR 2021)


Build Instructions

Let's not get ahead of ourselves...