Show Posts
Pages: 1 ... 71 72 [73] 74 75 ... 239
1081  Using Arduino / Project Guidance / Re: Need help in Codes for Arduino and RADius-S v1.1 on: January 29, 2014, 02:43:27 am
They are bi-directional, if you want one to only transmit then only use Serial.print/ln and Serial.write.
To only receive use Serial.read. These modules are probably the simplest mean of wireless communication other than straight wires.

Are you having an issue with them other than making them only transmit or only receive?
1082  Using Arduino / Project Guidance / Re: Need coding Help for keypad and LCD sheild interface on: January 29, 2014, 02:11:04 am
Did you try the example sketch that was provided on the page? You might need the library, which can be found by searching your LCD and the keywords Arduino library.
1083  Using Arduino / Project Guidance / Re: Mental block with programming sequence on: January 29, 2014, 02:08:48 am
So wait, it works but you can't see your password? Where did you put the Serial.println(numbuf) ? Do you want to see the full password or as you input it?
1084  Using Arduino / Programming Questions / Re: Help for putting my String variable value to my char array on: January 29, 2014, 12:44:14 am
Quote
char LED_DATA[] = "00:00 ~";
This is a string also, it's a C string, not to be confused with a String object.

There is a 8x8 dot matrix library called LedControl, that allows strings to be scrolled across the display.

Give it a try.
1085  Using Arduino / Project Guidance / Re: Power a Precise Motor? on: January 28, 2014, 10:24:56 pm
If you want to test right away, you can check Radio Shack. They have arduino boards, some kits and a motor controller that can drive a good size stepper. The drawback is it can be pricy, but you could probably find the exact same parts online for a LOT less, but you will need to wait however long.
1086  Using Arduino / Project Guidance / Re: Power a Precise Motor? on: January 28, 2014, 10:14:13 pm
Well you could probably simulate the stepper with just regular LEDs, this way you can test your pedel.
1087  Using Arduino / Project Guidance / Re: Power a Precise Motor? on: January 28, 2014, 09:47:13 pm
How large is a large motor? This HERE is a motor controller that can deliver up to 43 Amps, however the forth link I posted is rated for 2 Amps. How much power/torque do you need?
1088  Using Arduino / Project Guidance / Re: Power a Precise Motor? on: January 28, 2014, 09:36:35 pm
Quote
Is this possible (and if so, how) with Arduino? Can I use one to power a motor for specifically this purpose?
Yea it's possible, but not with the arduino alone. You will of course need a motor shield that can drive the stepper. There are also some good libraries in the Arduino Playground that you might want to check out, like the Adafruit Motor Controller or even the Arduino Motor Controller.

Here is another library that works with almost all third party motor controllers. Stepper

These here are compatible with the "Stepper" library.
DC 5V stepper motor
L9110S DC/Stepper Motor Driver Board H Bridge for Arduino
L298-Based Stepper/DC Motor Driver Board
DC Stepper Motor Driver Controller Board Module Model L298N for Arduino VE4A
1089  Using Arduino / Programming Questions / Re: bluetooth problem on: January 28, 2014, 09:24:09 pm
What bluetooth module are you using, and do you have any code to show?
1090  Using Arduino / Project Guidance / Re: Mental block with programming sequence on: January 28, 2014, 07:20:16 pm
This is not tested but if it doesn't work with 9 being in the while loop, change it to 8.
Code:
void getNumber(char buf[]){
    uint8_t i = 0, a;
    Serial.println("Getting Hp Number");
   
    while(i != 9 )   //allows only 8 Digit for Hp Number
    {
       a = getDigit();
       lcdPutCh(a);            // Display Hp Number on lcd
       buf[i]=a;               // store hp number into array for gsm       
       i++;
    }   
    //buf[i]=0;                 // reset my input hp number
}
1091  Using Arduino / Project Guidance / Re: Mental block with programming sequence on: January 28, 2014, 03:19:45 pm
Quote
The moment I key In 9, this exact thing is shown(9incorrect Password)
At the Next number, 7,(7incorrect Password)

That's because you need to collect the full password first then compare it. Right now your reading in one char, then comparing it, second char, comparing it...etc. Use a while loop to gather the full password first then see if it is a match.
1092  Using Arduino / Project Guidance / Re: My 1st project: TIE Crawler from the Star Wars Expanded Universe on: January 28, 2014, 03:07:40 pm
I'm going to keep the pictures large, this way it is easier to see the connections. Those two chips are Quad Half-H drivers (SN754410). One for the drive motors the other for the claw.
1093  Using Arduino / Project Guidance / Re: My 1st project: TIE Crawler from the Star Wars Expanded Universe on: January 28, 2014, 02:44:32 pm
No, but you can use the Lego motors, like I did in my video.
1094  Using Arduino / Project Guidance / Re: Problems with hacking Ikea Dioder on: January 28, 2014, 10:44:42 am
Like I said, I don't remember who it was that told me, but if it works with both then I was wrong and I apologize. I never questioned it, because at the time I only had one Arduino Uno, and I did not want to risk damaging it in any way.
1095  Using Arduino / Project Guidance / Re: Problems with hacking Ikea Dioder on: January 28, 2014, 10:37:53 am
You should never have wall power and USB power plugged in at the same time, it can damage your Arduino.

I'm surprised to read that. How will this damage anything?

I was always told you should never have both plugged in, that you could burn out the Atmega chip.
I don't remember who it was that told me, but since then I always stuck by it.
Pages: 1 ... 71 72 [73] 74 75 ... 239