Since they are typically driven one row or column at a time, the more that are on the lower the brightness each LED will have. Driver boards take different approaches to solving this problem ...
Hackerspaces are no strangers to repurposing outdated tech, and Nottingham Hackspace happens to own one of those oddities one ...
The new LED driver also features analog and PWM dimming of the LED current via a DIM pin and has a 1% reference tolerance.
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