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Hi d4rkh00d,
I'm not in Italy and I don't have the LM3914 display schematic, here I post a generic schematic, with reference to display (3leds) stage you must connect IC1A output to pin5 LM3914, for better adjustment can add between P1 and ground a resistance of 68K (or more).
Best Regards
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Thank you very much FrancoItaly