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A project log for Microtronic Phoenix

After 45 years, the original Microtronic firmware ROM rises from the ashes and flies with new hardware!

michael-wesselMichael Wessel 08/24/2025 at 05:030 Comments

Phoenix enthusiast venice1200 determined how to maximize the contrast of the 3661AS LED displays. He is using two filters layered on top of each other - a black and a red one. The contrast is stunning; see the following pictures for black+red, black only, red only, and no filter:

LED filter black and red

LED filter black

LED filter red

LED filter red

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