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abhishek yadav's Discussions

how to record time between two events using arduion

Started this discussion. Last reply by Jonathan Dean May 24, 2013. 2 Replies

i have a disk rotating at variable speed(max rpm 600) . i want to know how much time it takes to rotate by 120 degree in each revolution .i have the following equipment with me .Arduino leonardo, 5…Continue

16*2 lcd not working arduino leonardo

Started this discussion. Last reply by Christine C Jan 23, 2013. 8 Replies

i just bought a arduino leonardo,i just tried to run hello word sketch on it but i was not able to see any thing on the lcd. all connection was done properly .pin used on arduino- 12,11,5,4,3,2lcd-…Continue

 

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Jonathan Dean replied to abhishek yadav's discussion how to record time between two events using arduion
"Just remember that millis() will overflow after about 50 days, so there's the potential for getting a reading where the starting value is much larger than the ending value, which will give you a huge but negative difference. Granted, it will…"
May 24, 2013
abhishek yadav posted a discussion

how to record time between two events using arduion

i have a disk rotating at variable speed(max rpm 600) . i want to know how much time it takes to rotate by 120 degree in each revolution .i have the following equipment with me .Arduino leonardo, 5 volt proximity sensor.i want arduino to do following task.measure the time for each 120 rotation (in millisecond) and record the measured time for each 120 rotation because this time will be varying as disk rotate at variable speed. pls open attached ppt for more clearificationSee More
May 19, 2013
Christine C replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"Please consider this: http://www.johngineer.com/blog/?p=1224 [quote]For example, the lower 8 digital pins are no longer all a single port, and many of the pins, with the exception of the RX and TX lines, are moved around. Some of the PWM lines are…"
Jan 23, 2013
Jonathan Dean replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"I just tried my LCD to see what happens.  If the LCD and backlight are powered, the contrast pot doesn't do anything and the display is just blank (exactly what yours is doing).  I suppose that means that the Arduino isn't…"
Jan 19, 2013
abhishek yadav replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"only the back light LED glow.there is no other change in display when i sweep the port."
Jan 19, 2013
Jonathan Dean replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"Well, it looks like all of the pins go to the right places.  Does the screen light up when you power it on?  Do you see one line blacked out and the other not?  What happens when you sweep the pot from one extreme to the other?…"
Jan 17, 2013
abhishek yadav replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"i tried what u suggest but i did not work , so i uploaded the image. if u find any mistake in wiring pls make me know.  "
Jan 12, 2013
abhishek yadav replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
Jan 12, 2013
Jonathan Dean replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"Have you got your contrast pot hooked up?  If it's hooked up correctly, you should see an effect when you turn it even if nothing is displayed.  If that's working, try resetting the Arduino a time or two.  If it still…"
Jan 7, 2013
selvakumar replied to abhishek yadav's discussion 16*2 lcd not working arduino leonardo
"i am also have the same trouble... "
Jan 6, 2013
abhishek yadav posted a discussion

16*2 lcd not working arduino leonardo

i just bought a arduino leonardo,i just tried to run hello word sketch on it but i was not able to see any thing on the lcd. all connection was done properly .pin used on arduino- 12,11,5,4,3,2lcd- winstarpls help if anyone has any idea.See More
Dec 25, 2012
abhishek yadav is now a member of GarageLab (arduino, electronics, robotics, hacking)
Dec 25, 2012

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