What purpose does the yellow and green LEDs have on the Arduino?
John Rik
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I wired a shift register (74HC595 IC) to the Arduino Uno. As I gave power to the Arduino, the green and yellow leds on Arduino board stop shining. What are these LEDs for? And what is reason behind it?
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Total Answered: 1 Total Marked As Answer: 0 Posted On: 31-Dec-2015 02:52 Share: 
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Rohit
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Hi, Green led on Arduino Uno indicates the 'ON' condition when it shine. Yellow led connected to the digital pin 13 , so we can programmed that led. yellow led stop shining means all the power is drained out by shift register and this is not any problem. There will be a short in wired connection so that green led stop shining. So, check your connection, is it according to the pinout configuration of shift register.
Posted On:
02-Jan-2016 07:04
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