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1  Development / Other Software Development / Re: [MOD] Arduino Enhanced Release 1.0.3 for Windows (installer, drivers, etc) +SRC on: December 27, 2012, 05:57:33 pm
Great modification Eriel and Thanks for sharing it with everyone.
Would love to look over the code you shared and learn something from it some day.

Thanks again.
2  Using Arduino / Motors, Mechanics, and Power / Re: Issues with my solenoid vlave. No water is flowing through. on: January 15, 2012, 07:51:34 pm
Does the solenoid work if you remove the electronics and just connect the battery to it?

Sorry I forgot to mention that. No the valve did not work when I gave it direct power. Also I just did a resistance check to see if there is continuity across the terminals and I did not get any reading.
3  Using Arduino / Motors, Mechanics, and Power / Issues with my solenoid vlave. No water is flowing through. on: January 14, 2012, 10:47:45 pm
Hello everyone,
I bought this solenoid valve (http://www.sparkfun.com/products/10456) to be able to control water flow in my back yard. I know many people have said me lately there are alternatives to solenoid but I did not know it when I bought it. Anywayz, the issue is the water is not flowing out when I connect the valve to a garden hose. Here is how I have built my circuit and done some troubleshooting as well:


Using TIP120 transistor: I have the base pin connected to 2.2K resistor going to arduino digital pin.
                                    The positive pin of solenoid valve is connected to 12v power (2 batteries connected in series).
                                    The negative pin of solenoid valve is connected to TIP120 collector pin
                                    A diode is connected from collector pin to the positive pin of solenoid valve.
                                    Finally I grounded the emitter pin. But when I connected my garden hose to the valve,the water would not                   flow through.

Alternatively for troubleshooting purposes, I disconnected the arduino from base pin and connected a switch to base pin and connected an LED and the valve to the switch , going through collector pin of transistor. I was expecting when I press the switch, both the light comes on and water will flow through as well. However, only light comes on and still no water is flowing thorugh.

Is there any other sort of troubleshooting I can go through to figure out the issue? How can I check to see that the valve is functioning properly?

I appreciate any possible help. Thank you.
4  Using Arduino / Networking, Protocols, and Devices / Re: linking rf transmission & receiver with arduino on: January 04, 2012, 04:59:53 pm
Thank you CrossRoad for your help. I did not realize that pins 11 & 12 were default pins.
5  Using Arduino / Networking, Protocols, and Devices / linking rf transmission & receiver with arduino on: January 04, 2012, 02:33:11 am
I got a pair of 434mhz rf link transmitter and receiver and I have gone through several examples but I am not getting it to communicate. I was wondering if you could guide me if I am doing something wrong.

As per my circuit:
I have receiver pin 1 connect to Ground, pin 2 to digital pin 2 (for data in) of arduino, and pin 4 to power (5v). And I have an led connected to pin 11 for debugging purposes.

For the transmitter:
I have pin1 connected to Ground, pin2 to digital pin 4, and pin 3 to power(5v).

As per my code I have tried using Virtual wire library but I have not been getting any response on the receiver side.

So I just tried using NewSoftSerial library but that too has not worked.

Basically the transmitter is simply sending a sentence as char type to receiver and I have a if() statement on the receiver end which will turn on the LED if there is data on serial port. But instead LED comes on anyways.

At first glance, it seems like a programming error, but if I take out the rf receiver, the LED goes off and upon plugging receiver back the LED comes on. But if I take out the transmitter the LED still stays on.

Also the rx light on the receiver end should come on when receiving data but it isn't. Neither is the tx light on the transmitter end.

I have attached my receiver & transmitter codes in  here, if someone would like to take a look.
In the attached files: receiveSoft & transmitSoft use NewSoftSerial library and receivevw & transmitvw use Virtual wire library.

To me it seems like the transmitter is not functioning,

I appreciate any help.
6  Using Arduino / General Electronics / How to get 12v from arduino vin pin? on: December 27, 2011, 08:40:31 pm
Hi guys,

I was trying to power a solenoid valve, which requires 12vdc to operate.
So I connected a 9v and 3.7 v battery in series and then connected it to arduino vin and gnd pins.
And then I connect the valve to 5v on arduino (as power source) and gnd. I thought since I am powering from vin pin, I should read 12v on the valve,but instead I am reading 5v.

Am I suppose to get 12v reading ? If not, please some one explain how can I deliver 12v to the valve?

Thank you.
7  Using Arduino / Project Guidance / Wiring Rj-11 breakout boards with arduino on: November 08, 2011, 04:38:15 pm
Hello,
I was implementing rj-11 breakout boards (http://www.gravitech.us/rjbrbo1.html) with arduino for the weather meters found here (http://www.sparkfun.com/products/8942). I was wondering if some one can guide me as to how to I connect the rj-11 breakout with arduino. I could not find any data sheet explaining me how to wire the rj-11 with arduino .


Thank you.
8  Using Arduino / Motors, Mechanics, and Power / Re: Controlling DC solenoid valve with Arduino on: October 23, 2011, 11:52:31 pm
Yes, I did read that description. But I live in college dorm and do not have access to water hose to test it in that way. I realize that without some liquid pressure it would not turn on but I was wondering if I am suppose to see something when just providing voltage. Because currently I don't.
9  Using Arduino / Motors, Mechanics, and Power / Re: Controlling DC solenoid valve with Arduino on: October 23, 2011, 02:32:28 pm
I am sorry, I thought I posted the link to the valve. Here is the link to the valve I am using:
http://www.sparkfun.com/search/results?term=solenoid+valve&what=products

Thank you.
10  Using Arduino / Motors, Mechanics, and Power / Controlling DC solenoid valve with Arduino on: October 23, 2011, 01:43:23 am
Hello,
I am trying to control a solenoid valve using Arduino Uno. Here is the circuit diagram that I am following:
http://www.arduino.cc/playground/uploads/Learning/solenoid_driver.pdf][url]http://www.arduino.cc/playground/uploads/Learning/solenoid_driver.pdf[/url]

But I am not getting any response. Since I got no response when connecting through Arduino, I connected it directly to battery but it still did not show any sort of response.

Is there any way that I can troubleshoot this. Sorry I am a noob and this may sound stupid but my understanding was when I pass current the magnetic valve should open. Is that right? Am I suppose to see that reaction because right now I don't.

Here is the link to the valve I am using:
http://www.arduino.cc/playground/uploads/Learning/solenoid_driver.pdf

Thanks for any help.
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