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Since you can't backup the original NANJG firmware (it's protected, you only
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get garbage if you try), you can't restore it's functionality if you flashed a
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new firmware to it. Here's a firmware that is somewhat similar (i.e. the mode
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group is selected by solder bridges between stars and the outer ring), but with
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more and different groups that seem to be needed more often (no blink modes).
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It's levels are 5%-33%-100% and optionally a moon mode (a few milliamperes,
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depending on hardware variations like LED voltage).
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star open closed (soldered)
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1 The 1st star is a dummy and not connected anyway.
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2 3 modes L/M/H 4 modes, additional moon level
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3 ascending mode order (moon/)L/M/H descending mode order H/M/L(/moon)
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4 classic memory no memory
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Any combination is valid, so these are 8 groups in total and should meet most
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Example: Moon/Low/Mid/High, no memory: Solder stars 2 and 4 to ground (the
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It also has a PWM frequency of 18kHz, which is not visible and not audible (no
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Battery monitoring: Whenever the battery falls below 3V under load, brightness
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is reduced (about half).
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Recommended fuses are low: 0x75, high: 0xFF.
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Firmware download: nlite.hex, it's completely free (including commercial use).
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Please consider sending me a message if you use it commercially (i.e. sell
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drivers/dropins/lights etc); just for curiosity.