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31  Using Arduino / Project Guidance / Re: Supply for my project on: August 21, 2012, 01:23:16 pm
Diode seems to be a good idea..
thank you.. smiley
32  Using Arduino / LEDs and Multiplexing / Re: Multi colored LED on: August 21, 2012, 01:21:41 pm
ah...got it..
thnx
33  Using Arduino / Project Guidance / Re: Supply for my project on: August 21, 2012, 01:19:39 pm
I would probably use 7805 for the arduino, what about the rest? Is it advisable to use a single 6v supply to all these components? Or should I use 2 separate power supplies?
34  Using Arduino / Project Guidance / Supply for my project on: August 21, 2012, 01:07:38 pm
Hi,
I am using 4 AAA batteries (6V), to power up a setup, which includes 2 geared motors (they operate at 6v and 500mA at max load.), Arduino mini micro controller, 8 LED, 6 LDR.  Will I have any problem with this??
35  Using Arduino / LEDs and Multiplexing / Multi colored LED on: August 21, 2012, 12:59:20 pm
Hi.
I purchased few LEDs, rgb, red and blue.
I was just playing with them powering them with 3v lithium battery, and I found something interesting. When Red and RGB are powered together I only get red color from the rgb LED, I tried to light blue and the RGB together, but blue didnt affect the RGB, I get ll three lights from  the RGB LED. Am just curious about this. Is there a reason for this phenomenon??
36  International / India / Re: Arduino Mini 04 on: August 21, 2012, 12:53:09 pm
Let me first describe the physical setup.

I have a arduino duemilanove. I am trying to upload the codes from my duemilanove to my Arduino Mini 04.
1. I removed the IC from Duemilanove board.
2. Tx Duemilanove is connected to Tx of Arduino Mini, Rx to Rx, Gnd to Gnd, reset to reset, 5v supply to 5v . http://arduino.cc/en/Guide/ArduinoMini. This is the Exact setup.
3. Copied the Boards.txt
mini328.upload.protocol=stk500
mini328.upload.maximum_size=28672
mini328.upload.speed=115200

mini328.bootloader.low_fuses=0xff
mini328.bootloader.high_fuses=0xd8
mini328.bootloader.extended_fuses=0x05
mini328.bootloader.path=bt
mini328.bootloader.file=ATmegaBOOT_168_atmega328.hex
mini328.bootloader.unlock_bits=0x3F
mini328.bootloader.lock_bits=0x0F

mini328.build.mcu=atmega328p
mini328.build.f_cpu=16000000L
mini328.build.core=arduino

Am using Arduino 1.0
4. Selected the Arduino mini using Atmega 328 from the boards in the IDE.
5. And when I upload I get this message
Binary sketch size: 1026 bytes (of a 28672 byte maximum)
avrdude: stk500_getsync(): not in sync: resp=0x00

Hope that Helps!!!
37  International / India / Re: Arduino Mini 04 on: August 21, 2012, 12:38:26 pm
I have posted this 10 times in 5 different fourms!! And I never got any reply except for the mail to customer support in sparkfun.
Since this is Indian forum, I wanted to try my luck here. Let me repost them here. Hope I get a solution!!

38  Community / Gigs and Collaborations / Re: Need Help Programming Bot on: August 21, 2012, 12:33:17 pm
lol...

Dont tell me that you are trying to recreate curiosity... smiley-razz
39  Topics / Education and Teaching / Re: Good Books To Learn About Arduinos and Programming on: August 21, 2012, 01:07:39 am
You dont need a book for arduino. Everything you need is available in the main site of arduino. Still, I would recommend you to get this book. https://www.sparkfun.com/products/11170 .
40  Topics / Robotics / Re: Video camera with arduino + image processing. on: August 18, 2012, 12:01:24 am
You already have all your options listed. You will have to choose one of those.
Or, simply get a color sensor http://www.sunrom.com/sensors/color/color-sensor . It recognizes the color, but not the object. The rest depends on your coding.
41  Community / Gigs and Collaborations / Re: Help for an uber-newbie making a light up wig on: August 15, 2012, 04:32:56 am
Am a bit late in posting this reply!
But, I think you have a better option than a LED.
http://www.save-on-crafts.com/elwires3.html
These are El glow wires, 2.2mm thick.
42  Using Arduino / Motors, Mechanics, and Power / Re: analogWrite only works with HIGH & LOW, no PWM on: August 14, 2012, 08:56:06 am
I dont think you can do, what you need with this L298 driver IC.
Ok,
In a mcu, the max curent is only around 40 mA and the max voltage is 5v. to drive a motor this current is not enough, that is why you use a driver IC. You connect a external power supply to the IC, and the pwm pins from the mcu to the IC. This pwm which is connected,is only to trigger external power supply, its just like a switch.

What you are trying to do here is, you are varying the voltage of this switch. This will have not affect the motor speed.
your logic can be used only when the load is directly connected to the mcu. Like LED for instance..
43  Using Arduino / Motors, Mechanics, and Power / Re: analogWrite only works with HIGH & LOW, no PWM on: August 14, 2012, 07:58:32 am
Errmm.. Could you link the sparkfun id for this IC?
44  Using Arduino / Interfacing w/ Software on the Computer / Re: Webcam interface, PC, and arduino on: August 14, 2012, 01:01:55 am
You will need this.
http://beagleboard.org/

45  Using Arduino / Sensors / Re: altitude sensor on: August 14, 2012, 12:48:18 am
Simply use Ir sensors?
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