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46  Using Arduino / Microcontrollers / Re: atmega1284p/pu on: September 03, 2012, 11:21:36 am
i understand what you mean but i dont know what to change.
47  Using Arduino / Microcontrollers / atmega1284p/pu on: September 03, 2012, 08:49:24 am
He guys,
i bought atmega1284pu and i tried to boot bootloader but it didnt work. i was following these tutorials:
I used arduino uno as isp but i get this error:
avrdude: Device signature = 0x1e9706
avrdude: Expected signature for ATMEGA1284P is 1E 97 05
         Double check chip, or use -F to override this check.
Do you think the problem is that i have atmega1284pu and not atmega1284p?
thanks for your answers  smiley.
48  Using Arduino / General Electronics / Re: motor (maybe servo) hardware choices? on: August 11, 2012, 05:31:39 am
DC motors have a lot rpm but they are weak. you will to use gearbox otherwise you will be able to stop them with finger. for your project i should recommend gear ratio abouth 10:1 or higher. try to find something smiley-wink
49  Using Arduino / Sensors / Re: IR sensor started flashing on: August 11, 2012, 05:22:31 am
thanks for help but i fixed it different way. i connected one pin of capacitor to output of comaparator and second pin to ground. now it works fine.  smiley-grin
50  Using Arduino / General Electronics / Re: motor (maybe servo) hardware choices? on: August 09, 2012, 03:41:38 pm
you can try DC motor with encoder. that is clasic DC motor that ca read how much it rotates.
51  Using Arduino / Sensors / Re: String potentiometer on: August 09, 2012, 03:33:23 pm
are you sure you have sensor in good angle because wrong angle use to be a problem.
52  Using Arduino / Displays / Re: SparkFun 5110 84x48 LCD supply voltage on: August 09, 2012, 03:20:51 pm
i guess that diagram is ok but if you are not sure (btw. i'm not sure either) connect the lcd to 3.3v and if it is not gonna work then try 5v.
53  Using Arduino / General Electronics / Re: motor (maybe servo) hardware choices? on: August 09, 2012, 03:15:41 pm
what abouth stepper motor.they are slow bot strong and you can cotrol their move. only one disadvantage is conncection and price.
if this didn't  help then i guess there are servos that can turn 360 degrees but they are pretty rare.
54  Using Arduino / Installation & Troubleshooting / Re: How to find out how long mega328P loads after RESET? on: August 09, 2012, 03:02:21 pm
when you connect power supply arduino uno it starts working immediately, however arduino deu....(atmega168) starts afer one or two seconds.  smiley-cool
55  Using Arduino / Installation & Troubleshooting / Re: Help! The Lights are on but nobody's home! on: August 09, 2012, 02:58:01 pm
did it work after you changed regulator? try to meassure voltage that is on board when it's connected
56  Using Arduino / Sensors / Re: IR sensor started flashing on: August 09, 2012, 02:44:43 pm
thanks for reply but LEDs are on top side of PCB and phototransistors are on bottom and they even have filter.
57  Using Arduino / Sensors / Re: How to send analog value from xbee to excel file on: August 09, 2012, 02:26:37 pm
what abouth get all data from sensor to sd card  smiley-wink. this is great tutorial and there is used excel:
58  Using Arduino / Sensors / IR sensor started flashing on: August 09, 2012, 02:18:39 pm
Hi guys,
so i built digital sensors for my linefollowing robot. it´s the same schematic as on the picture but i´m not using cny70. it was working fine. on the black line LED was turned off and on white was turned on. since one moment all sensors stoped working properly. on white LED in ON but on black led starts blinking. it's very fast blinking. i triedd to recalibrate but nothing  smiley-cry. it worked before so i don't know what can be problem. can anyone help me, please?

parts that i'm using:
lm358 (comaparator)
sfh203 (phototranzistor)
some IR LEDs
59  Using Arduino / Programming Questions / Re: function ''if'' is not working or did i write it wrong? on: August 04, 2012, 09:08:56 am
parenthesis was missing. thanks so much.  smiley-sweat i must be blind  smiley-sweat
60  Using Arduino / Programming Questions / Re: Arduino ISP Shield, what AVR chips are supported? on: August 04, 2012, 09:04:43 am
atmega168/328 will work. tested  smiley-lol.
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