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The code is failing.'GIMSK' was not declared in this scope error.There probably is not an interrups library. Because of this, it should be giving this error. How can I fix it?
Finally, how many volts will the batteries be?
How do you charge all the batteries with one USB chargers? And you have not put a resistance to protect UV Leds. Will not these UV Leds burn down? If I put the resistor to protect UV Leds, does the circuit still function the same?