i have been working on making an arduino alarm clock using a 4 seven segment display, the display has 4 ground wires for each seven segment and common anodes. i have 4511 decoder to turn the 4 bit number into something that can displayed. i have connected the grounds of the display to the collectors…

arduino clock

system May 1, 2014, 8:11pm 2

So you are suprised that you can't read it 5 mS ?

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