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31  Using Arduino / Project Guidance / Re: Arduino Development Board? on: June 07, 2014, 08:26:05 pm
In general for reliable operation of any digital IC you need a bypass or decoupling capacitor as close to its power pin as possible.  If the IC has more than one power pin then you need more than one capacitor.  Atmel recommends one for the AVcc pin as well.
The Aref pin had to wire a .1ufd bypass cap from that pin to ground for a slight noise reduction improvement for AnalogReads.

These are some info what other had done.

https://learn.adafruit.com/standalone-avr-chip-programmer?view=all


ISP Shield for Arduino
http://shop.evilmadscientist.com/productsmenu/tinykitlist/253
32  Using Arduino / General Electronics / Re: My DS1302 RTC gets ahead of real time on: June 06, 2014, 10:28:45 pm
If your drift more or less constant daily, you may try the way on this link

DS1307 RTC adjust drift automatically
33  Using Arduino / Project Guidance / Re: Laser Communication on: June 06, 2014, 06:30:52 am
http://www.instructables.com/id/Laser-Transceiver/?ALLSTEPS

Just be aware that photo resistors react too slowly.  They will take some time from they have been exposed to light to they are back to their "dark resistance".
A photo transistor would probably be a better solution in your case.

This might be interessting:

http://blog.makezine.com/2008/08/13/laser-modem-with-an-ardui/
http://www.ohmpie.com/laserModem/
http://pyevolve.sourceforge.net/wordpress/?p=2383
Try to google "Arduino laser modem" that should give you something to go with.
34  Using Arduino / Project Guidance / Re: Moving ATX powersupply pcb to another box on: June 04, 2014, 06:40:53 am
You can get one of this to modify

http://www.fasttech.com/products/0/10001558/1116201-led-pc-computer-atx-hdd-sata-power-supply-tester


or you can get a 24-pin ATX Power Extension Cable that have male 24-pin ATX connector as well as a female 24-pin connector from ebay and cut the cable to re-use the connector.
35  Using Arduino / Project Guidance / Re: how to install an operating system in arduino duemilanove fritzing atmeg1 168 on: June 03, 2014, 08:18:54 am

i am already sketch ArdOS libraries its working properly.

my question is how to installed ArdOS on atmega168 microcontroller ? actually i am adding libraries to ide not installing am i write . i am beginner learning microcontroller programming can u please help me

thanking you in advacnce
ArdOS installed as a libraries form but it provide the OS kernel for the RTOS functions like scheduling, semaphores & Queues.

Can you explain what role you envisage for the operating system?

Edit:
Something for you to read
http://ossec.es2.be/Portals/6/Users/082/82/82/Nicolas_Pantano_report.pdf
36  Using Arduino / Project Guidance / Re: how to install an operating system in arduino duemilanove fritzing atmeg1 168 on: June 03, 2014, 05:47:23 am
ArdOS: The Arduino Operating System. Now for the Arduino IDE!
http://forum.arduino.cc/index.php?topic=170305.0

Edit:
NilRTOS - A Fast Tiny Preemptive RTOS
http://forum.arduino.cc/index.php?topic=144715.0

Article on Arduino Real Time
37  Using Arduino / Project Guidance / Re: Arduino Robot won't follow line on: June 02, 2014, 08:35:41 am
I had compile the example line following programs using IDE 1.5.6-r2, these was the message shown

Quote
Sketch uses 28,616 bytes (99%) of program storage space. Maximum is 28,672 bytes.
Global variables use 2,092 bytes (81%) of dynamic memory, leaving 468 bytes for local variables. Maximum is 2,560 bytes.
Low memory available, stability problems may occur
38  Using Arduino / Project Guidance / Re: Determining required RAM size on: June 02, 2014, 07:37:43 am
The current version IDE Arduino 1.5.6-r2

Code:
void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}
Quote
Sketch uses 466 bytes (1%) of program storage space. Maximum is 32,256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2,039 bytes for local variables. Maximum is 2,048 bytes.
39  Community / Bar Sport / Re: Post your code on: June 02, 2014, 05:20:38 am
Glad you guys like it. 

I really feel Mike did the hard part.  smiley-wink
Good Job, James 1+
40  Using Arduino / Project Guidance / Re: Moving ATX powersupply pcb to another box on: June 01, 2014, 09:02:56 am
This site show how you can avoid wasting time converting old PC ATX power supplies into benchtop power supplies. The answer is not to convert them at all, but make an adapter unit.

This also saves time if you damage a PS while modding it. If the PS was working when you began modding it, and then a bit of ESD fries something, or a slip of the drill damages it while making holes in the original PS's case, etc, and then you get all done and turn it on...nothing. Then you wasted all that time doing the mod. Forget all that!! Just make one (or two!) of these adapters unit.
41  Using Arduino / Project Guidance / Re: 2x3-pin header source on: May 30, 2014, 06:38:44 pm
Is it something like is?

http://www.mouser.com/3M/Connectors/Headers-Wire-Housings/_/N-ay0loZscv7?P=1z0zp4dZ1z0wxp6Z1z0x3z4Z1z0wxnw&FS=True
42  Using Arduino / Project Guidance / Re: Arduino for extensive Image processing and suitable camera. on: May 28, 2014, 10:38:41 am
Or using this Intel Galileo with 256MBytes DRAM
http://arduino.cc/en/ArduinoCertified/IntelGalileo
43  Using Arduino / Project Guidance / Re: Arduino for extensive Image processing and suitable camera. on: May 28, 2014, 10:22:50 am
With Atmel’s AT90S8515 microcontroller and a black-and-white digital camera with a resolution of 123 x 128 pixels, operating at a rate of one to 30 frames per second.
http://www.atmel.com/images/issue4_pg39_43_robotics.pdf
44  Using Arduino / Project Guidance / Re: Help with sampling using analog port (noise from finger) on: May 28, 2014, 08:22:58 am
http://arduino.cc/en/Tutorial/PWM
http://playground.arduino.cc/Code/PwmFrequency
4)   Repeat measurement with input from static  voltage from analog output (PWM)

Maybe there is something I do not understand? How do i go about doing this?
Make one of the pin output PWM and connect analog port to that pin.

45  Using Arduino / Project Guidance / Re: Arduino Onboard Battery on: May 28, 2014, 05:51:02 am
Otherwise, could you suggest a similar product that might do the trick.
https://learn.adafruit.com/li-ion-and-lipoly-batteries?view=all


https://www.sparkfun.com/products/10711


http://www.seeedstudio.com/wiki/Energy_Shield


http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2127566_-1
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