Show Posts
Pages: 1 [2] 3
16  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
17  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
18  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?
19  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
20  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
21  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
22  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
23  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
24  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
25  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
26  Forum 2005-2010 (read only) / Interfacing / arduino led color organ using an electec microphon on: November 17, 2010, 09:02:44 pm
hello
I came across this video and would like to build this but can't find the scematics or code can anybody help?
http://scottrharris.blogspot.com/2010/07/arduino-fast-fourier-transform-color.html
27  Forum 2005-2010 (read only) / Interfacing / Re: 315 Mhz RF Link Kit problem on: January 27, 2010, 05:09:08 pm
http://www.instructables.com/id/Arduino-and-RFID-from-seeedstudio/

check it out. this is how I got mine working.
28  Forum 2005-2010 (read only) / Interfacing / Re: humidity sensors cheap and accurate on: June 23, 2009, 01:59:43 pm
thanks again everybody. god i luv the internet. Just a random unreleated topic. I have a thousand ideas and will have 1 arduino. How many boards do you guys have and do you just build them yourselves? I saw a cheapduino on the instructables site that costs 10 bucks each i think. Is that as cheap as it goes?
29  Forum 2005-2010 (read only) / Interfacing / Re: humidity sensors cheap and accurate on: June 22, 2009, 08:56:36 pm
thanks for all the responses. I probably will go with one of the Sensirion sensors. Every post I have read has said they are rock solid. That is a good idea to also get some other cheaper sensors and calibrate them with the Sensirion. As for flyboy, how much do you want for 1 or more. Or just let me know when you put them on ebay. I want to play around with one for orchid growing.  
thanks
30  Forum 2005-2010 (read only) / Interfacing / Re: humidity sensors cheap and accurate on: June 22, 2009, 02:30:27 pm
thanks for the tip on never comparing readings. I have 2 humidity sensors that I was using in another project and comparing the readings drove me nuts. Where would be the best spot to get or look for humidity sensors. I go to digikey and search for humidity and get 20 pages of results. I am just looking to buy 1 for now but if it works out I'll buy a bunch. Any tips on the best source for sensors?
thanks
Pages: 1 [2] 3