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46  Using Arduino / Project Guidance / Re: What is this?? on: April 05, 2014, 02:58:19 am
That small board is a stepper motor, driver, but 2 regular DC motors will work too.
47  Using Arduino / Project Guidance / Re: Robotic arm from scratch on: April 05, 2014, 02:41:27 am
The servos need 6 volts to work properly so you may need a voltage regulator to bring down the voltage.
48  Using Arduino / Project Guidance / Re: Robotic arm from scratch on: April 05, 2014, 02:16:55 am
Well you would need some good torque motors, that is if you don't want to use servos. Or you could also use hydraulic pistons to move the arm.

Servos are good to start with, especially with a kit but for better stronger applications worm gears and hydraulics are the way to go.
One other thing, servos can not run off the 5 volts from the arduino, so you will need an external power supply that can output about 6 volts and decent current ~1 - 2 amps.
49  Using Arduino / Displays / Re: 16x2 LCD nearly works - but has a few strange characters. Why??? on: April 05, 2014, 02:07:06 am
It's possible your screen is getting the ASCII codes for the carriage return and new line. When you see what is printed on the serial monitor see if they are 10 & 13.
50  Using Arduino / Project Guidance / Re: Robotic arm from scratch on: April 05, 2014, 01:58:24 am
If you want your arm to be strong, then use metal worm gears. What is the arm going to be made from and how big will it be?
51  Using Arduino / Project Guidance / Re: need help with judge dredd lawgiver lights and sound [IMAGES] on: April 04, 2014, 09:18:13 pm
I want one.
52  Using Arduino / Displays / Re: Can't get my LCD screen to work. Help? on: April 04, 2014, 09:14:13 pm
Well what does it do? Does anything at all happen, does the backlight come on, do you see black boxes on the screen. Did you remember to have a pot connected to the contrast pin?

Post some pictures of your setup. Please try to make the pictures a reasonable size.
53  Using Arduino / Project Guidance / Re: Bee Hive Scale on: April 04, 2014, 08:38:22 pm
Why not just hang the hive from a digital scale? Or you can make your own scale that way you can have whatever alarms your want.
54  Using Arduino / Programming Questions / Re: Variable Counting on: April 04, 2014, 05:31:46 pm
Make sure you declare all the variables at the top.

if( someVar == 0)
  counter++;
else
  counter = 0;

Its not rocket science.
55  Using Arduino / Project Guidance / Re: Robot wireless mode select on: April 04, 2014, 01:26:50 am
Try this.
Quote
boolean state = digitalRead(Stay) ; // make state boolean at the top of your code
 if( state != lastState )
 {
   if( state == HIGH )
      s = !s;

   lastState = state; // <- this had to be taken out of "if( state == HIGH )"
 }
56  Using Arduino / Project Guidance / Re: Sumobot project on: April 03, 2014, 11:58:15 pm
Backlash, Nightmare and Minion were my favorites.
57  Using Arduino / Project Guidance / Re: Sumobot project on: April 03, 2014, 11:41:19 pm
Basically.
I miss Battlebots
58  Using Arduino / Project Guidance / Re: Sumobot project on: April 03, 2014, 11:13:17 pm
The rules are the same, each component must abide by a certain set of guidelines or rules according to their class to ensure a fair match.

As I said, they will not allow something as small as a toaster to go up against something as big as a lawnmower.
59  Using Arduino / Project Guidance / Re: Sumobot project on: April 03, 2014, 10:57:53 pm
Quote
Are we supposed to know what the heck that is ?
Im going to go out on a limb and say Sumo wrestling with robots.

Quote
What is the best program/ strategies to be used in competitions against other sumo bot users.
First you need to know what the rules are and what is allowed. How big does it need to be, I'm sure they won't allow something the size of a lawn mower, so find the max height, width and weight.

How many wheels can you use, can you use treads, what type of motors can you use. Find out if sensors can be used to detect and try to stay within the ring, even though I doubt sensors can be used but check everything.

Once you know everything that is allowed, then you can start designing and building.
60  Using Arduino / Project Guidance / Re: Creating a bluetooth controller on: April 03, 2014, 08:29:22 pm
The default baud rate is usually 9600. Also from my experience, if they are blinking then they are not connected, only when the LED is solid, are they connected.
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