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Author Topic: [Solved]LED Matrix, can't make it bright enought  (Read 1565 times)
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It's good then!
I'll do a recap of all I've learned along the investigation and post it. I came across some contradictory and wrong information while looking online for a solution.
Thanks a lot for the help man! It's very very appreciated. You definitely brought some light in here!! Hope
To be able to help you some day!
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I don't know why you got any light at all, either.  I don't know why the transistor still works
Because an NPN transistor with its collector and emitter swapped over is still an NPN junction and still works as a transistor but the gain is very much reduced.

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"LED's pulsed for say 200% of their 'normal' current at a 50% duty cycle appear brighter than 100% current for 100% duty cycle even though the maths says that it's all the same average current"
That is wrong although it is a common myth. Do your own experiments.

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Which one is right?
They both are, it is just they are calculating diffrent things. Having too much base current, even several hundred percent more has no effect on turning a transistor on, it has a slight effect on the time it takes to turn off however.
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