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1  Using Arduino / Sensors / Re: HC-SR04 ultrasonic sensor on: June 16, 2013, 11:52:09 am
I just shorten down how long I waited in between ping to 20 millisecond and got my reading between 5cm range. Works pretty good. So all the drop out to zero or the large number it spit out every once in a while it will just ignore it.
2  Using Arduino / Sensors / Re: HC-SR04 ultrasonic sensor on: June 16, 2013, 06:44:24 am
Like getting the average of 5 readings or something. I haven't really done any math with arduino yet. I will have to try to find somewhere to read about it.
3  Using Arduino / Sensors / HC-SR04 ultrasonic sensor on: June 16, 2013, 05:26:13 am
I'm using the NewPing library. I'm trying to use my ping sensor to control a robot. My problem is that it keep dropping down to 0 which is interfering in my reading. How do I get the reading to stay smooth and steady. Didn't know if there may be a way to add capacitors or something.
4  General Category / General Discussion / Re: SPST switch to car battery on: May 12, 2011, 10:26:52 am
http://www.radioshack.com/product/index.jsp?productId=3111494

Thats the switch I have.
5  General Category / General Discussion / Re: SPST switch to car battery on: May 12, 2011, 10:23:30 am
So do I need to use the relay and the fuse thats under the hood.  They both still work.  I believe it was a 30a fuse but could be 10a.  I'm hoping the fuse would be all I need, what you think?  Thanks alot for your help.

P.S.  I also believe I have to get a 16g wire or bigger, sound right?
6  General Category / General Discussion / SPST switch to car battery on: May 12, 2011, 09:59:41 am
I bought a 12vdc 30a spst switch.  I'm wanting to hook it up to my car battery and use it to turn my radiator fan on and off.  Do I need something in between the switch and battery?  Thanks for your help
7  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Is a 4x4x4 led cube possible??? on: November 09, 2009, 10:23:23 am
I know how to charlieplex and it would be really cool to do but it wouldn't work for a cube.  The wires would be a complete mess and I'm not evern sure if you can even make a cube that way, but be interesting to see if someone come up with a way.
8  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Is a 4x4x4 led cube possible??? on: November 09, 2009, 10:21:35 am
I thought by having the led turns on 1 at a time wouldn't exceed the board ma.  Could someone explain that to me please. I'm also going to be using resistors.  
9  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Is a 4x4x4 led cube possible??? on: November 07, 2009, 03:01:33 pm
I never used shift register so do you know a good tutorial or explain it a little on how I might use it and hook it up please.
10  Forum 2005-2010 (read only) / Frequently-Asked Questions / Is a 4x4x4 led cube possible??? on: November 06, 2009, 09:47:24 am
I know you can use the arduino alone to make a 3x3x3 led cube since it only use 12 pins but what about a 4x4x4 led cube?  It would take up 20 pins which would be every single pin on the board and far as I knew you must avoid using the TX and RX pin.  I just wanted to know if it was possible or would cause issues if I were to use all pins.  I know you can get an MAX chip to do this instead of using all the pins, but I just wanted something for now so I can mess around with until I can get the MAX chip in the future.
11  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Arduino line following help? on: May 28, 2010, 09:33:37 am
Aren't photo-transistors better to use with some IR led?
12  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: 7 segment LED on: May 28, 2010, 07:55:50 am
sorry what I meant
13  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: 7 segment LED on: May 28, 2010, 05:46:22 am
I must say I would go with some shift register. After I just started using them a day ago I can't believe how awesome it is.  The code is also very simple, just use 8 bit binary. So make a table like

Code:
byte zero =  B11111100;
byte one =   B01100000;
byte two =   B11011010;
byte three = B11110010;
byte four =  B01100110;
byte five =  B10110110;
byte six =   B00111110;
byte seven = B11100000;
byte eight = B11111110;
byte nine =  B11110110;
14  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Making a standalone Arduino on: May 28, 2010, 06:11:14 am
This might also be of some help if you still need it.

http://itp.nyu.edu/physcomp/Tutorials/ArduinoBreadboard
15  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Help using IC atmega328 without duemilanove board on: May 28, 2010, 05:52:16 am
The best one I ever came across:

http://itp.nyu.edu/physcomp/Tutorials/ArduinoBreadboard
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