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16  Using Arduino / Motors, Mechanics, and Power / Re: arduino variable speed fan controller on: February 03, 2011, 01:30:02 am
here is one controller
http://www.randmsupply.com/productdisp.php?pid=114&navid=6

seems this controller uses a relay
guess I should just go with a relay
17  Using Arduino / Networking, Protocols, and Devices / Re: strange ethernet shield problem on: February 03, 2011, 01:02:33 am
Im using the stock ethernet web server sketch. works perfectly when connected to puter with proper drivers

the power is from a wall wart. I dont think its a power issue because it starts to work when the computer it is plugged into has the proper usb drivers.

I am really stumped on this one. I am so glad I figured out the problem though.
I am sure it is something simple.
18  Using Arduino / Networking, Protocols, and Devices / strange ethernet shield problem on: February 02, 2011, 08:18:53 pm
ok i have the official Ethernet card and am having some strange problems

I was trying to connect using a linksys wrt54g router with no success. The router is away from my reg computer so I never had them connected at the same time.
So I hook up another router near my home computer and hook them both up at the same time and everything works as it should. Im excited at this point until I unplug my duino from my puter and plug in the barrel jack. Nothing happens none of the tx rx lights come on. So I plug it back into my computer and it works again. I was thinking that there was some issue with my barrel jack not providing enough juice or something but it seems the only way my duino will connect to the router is if it is connected to a computer with the proper drivers. I plugged it into my roomates computer without drivers and it didnt work. When I installed them it did.

What gives here?

I have an Arduino Duemilanove 2009 purchased from adafruit
official wiz net ethernet shield without sd card

thanks
19  Using Arduino / Displays / Re: displaying sensor readings with the nokia 5110 on: February 02, 2011, 07:50:22 pm
I hooked it up according to this file

#ifdef PB1
#define LCD_RST PB1
#define SPI_CS  PB2
#define SPI_MOSI PB3
#define SPI_SCK PB5
#define LCD_DC  PB0
#define LCD_BL  PD7
#else
#define LCD_RST PORTB1
#define SPI_CS  PORTB2
#define SPI_MOSI PORTB3
#define SPI_SCK PORTB5
#define LCD_DC  PORTB0
#define LCD_BL  PORTD7
#endif

It doesnt want to work for me still. Using another example I can get the hello world but don't understand how to use that to display sensor data
20  Using Arduino / Motors, Mechanics, and Power / Re: arduino variable speed fan controller on: February 02, 2011, 07:46:09 pm
hmmm
my friend insists that these controllers I want to mimic are varying the speed of the fan dependent of temp. I figured a relay circuit would accomplish the same goal. I figured I would use  pwm to tell the switch how much current to let pass. Am I barking up the wrong tree?
should I go with a motor driver circuit with a l293d?

thanks
21  Using Arduino / Motors, Mechanics, and Power / Re: arduino variable speed fan controller on: February 02, 2011, 04:35:19 pm
something like this
http://www.hydrofarm.com/pb_detail.php?itemid=8092

I think these fans have a variable speed controller that you can buy but I want the arduino to control that

thanks
22  Using Arduino / Motors, Mechanics, and Power / arduino variable speed fan controller on: February 02, 2011, 04:05:08 pm
hello
I want to build a variable speed fan controller.
I have my arduino hooked up to a temp sensor that I want to take readings and control a fan. At first I thought relays would do the trick but somebody mentioned using a MOSFET. I want to be able to control the voltage to the fan through PWM perhaps? What do you think the best method would be to set this system up?

thanks
23  Using Arduino / Displays / displaying sensor readings with the nokia 5110 on: January 28, 2011, 06:28:35 pm
Hello
I want to be able to display a few values on the nokia 5110 from sparkfun http://www.sparkfun.com/products/10168

I have been able to get the example sketch working from
http://www.arduino.cc/playground/Code/PCD8544

I just don't understand how I print values from my sensors?
I understand that this uses the same driver as the 3110
I tried using the 3310 library but I cannot get anything to display
Any suggestions?
24  Using Arduino / Sensors / Re: translating a potentiometer readings into a range of values on: January 28, 2011, 06:24:11 pm
thanks thats exactly what I was looking for
25  Using Arduino / Sensors / translating a potentiometer readings into a range of values on: January 28, 2011, 01:15:39 pm
hello
I am sure this is an easy 1
I have a potentiometer that I want to use as a temp controller with a sht15 sensor. I need to translate the 0 - 1023 range of the potentiometer to a range of 50F-100F

so I know 0 is 50F and every 20.48 it would advance a degree
What would be the best method to code this?

thanks
26  Forum 2005-2010 (read only) / Troubleshooting / Re: Building a pinball machine, is Arduino what I need on: December 18, 2010, 09:42:21 pm
any progress on this? I really would like to do this as well. Ben Heck did it with a basic stamp so it should be doable with the arduino right?
http://benheck.com/bill-paxton-pinball-making-of
27  Forum 2005-2010 (read only) / Development / Re: cheapest ethernet shield solution on: July 28, 2009, 11:34:35 pm
sweet that is exactly what I was looking for. Yes I was thinking of the adafruit shield. I had been looking around and just remembered the price but didnt look at the specifics. Thanks for pointing out that it is only the shield and not the module. For my rbbb's I didnt really care about the shield anyway I just wanted the functionality. This forum rocks. Thanks for the help
28  Forum 2005-2010 (read only) / Development / cheapest ethernet shield solution on: July 28, 2009, 03:48:42 pm
Hello
sorry if this is iisn't in  the right spot. Where is the  cheapest ethernet shield I can purchase. I swear I saw one somewhere for 15.99. it might of been on ebay but cant find it again. it seems all the other ones i see now are about 30-40 bucks with shipping. If I could find one that is a kit it wouldnt be a problem. If anybody has any suggestions of where the cheapest hardware is plz enlighten me. I am buying rbbb's from modern device. Sweet boards by the way. I wouldn't mind buying the components and building it myself if that is the cheapest solution.
thanks
29  Forum 2005-2010 (read only) / Interfacing / Re: arduino led color organ using an electec microphon on: November 18, 2010, 03:50:00 am
thanks for that sparkfun link
thats a cool chip
30  Forum 2005-2010 (read only) / Interfacing / Re: arduino led color organ using an electec microphon on: November 17, 2010, 10:10:17 pm
Guess I am just a digital junkie. I agree that the analog route is probably cheaper. From the pic it seems that it is just a electec mic with an arduino, protoshield, resistors, and some leds. I have all those on hand today and wanted to build it. I guess I need to pick up some op amps and transistors to do the analog version. I was also thinking if I got the basic version down I could use the arduino to make something even better and more powerful

bryan
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