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Thank you for posting this. It is quite interesting.The very best.
No question is stupid. The idea is to be able to see the blinks. If the crystal is too fast, the blinks will be too fast to see-- it will appear as steady on. At very fast crystal, you might notice a difference in brightness of the different LEDs, but I'm unsure without trying.
This may be a stupid question, for which I apologize for in advance. Why can't the crystal exceed 2kHz? Thanks in advance!
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