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71
Proyectos / Proyecto independiente por USB...
Last post by MlucianoEze - Today at 03:18 am
Hola a todos. Como varios saben, existe una opción en la Arduino Leonardo para usarse como HID USB (para emular funciones de mouse, teclado o joystick). En la Arduino Uno (mi caso), no existe esa opción, por lo tanto se debe flashear el Atmega16U2 (conversor USB/Serial) para que actue como HID USB.

Si yo quiero hacer un joystick, y quiero hacerlo separado de la Arduino, cómo podría hacer para que actue como HID USB, si este conversor no está presente?
Que yo sepa, se puede comprar, pero no sé como hacer las conexiones.

Si alguien supiera como se hace, estaría agradecido.

Compra del Atmega16U2
72
Project Guidance / Re: 7-Segment Ping Pong Scoreb...
Last post by TomGeorge - Today at 03:18 am
Hi,

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png or pdf?

Tom...... :)
73
Displays / Re: LCD won't write letters
Last post by Paul__B - Today at 03:17 am
I got the exact same problem as the TS. I've basically tested all kinds of codes to get it working with my 1602 LCD. I've tested all the Liquid Crystal libraries. I can control the backlight (on and off) but can't see any text.
I'll leave the finer detail to Floresta as he has his help dialogue ready to cut-and-paste.

Note that you need to install the fmalpartida library and remove the useless one that came with the IDE.  Completely.

And that you have to adjust the contrast pot until you get the initial - uninitialised - display shown in the first photo in this thread.

Then you need the I2Cguesser sketch.
74
Project Guidance / Re: Issuses with Programming F...
Last post by jaching - Today at 03:13 am
For those interested, I ended up finding out the issue.  The functions provided by Arduino for setting individual pin logic levels are pretty slow so after some further research I found a library from jrraines that is significantly faster and interrupt safe.
 http://forum.arduino.cc/index.php?topic=46896.0

I also decided to use the SPI library to transfer which in turn changed the placement of the clock, and data pins to their respective slots in the library for SPI and also placed the latch on pin 10.  Below is my modified method for loadByte.

Code: [Select]

void loadByte(byte hiByte, byte midByte, byte loByte, byte data[])
{
  digitalWriteFast(sLtch, LOW);
  SPI.transfer(hiByte);
  SPI.transfer(midByte);
  SPI.transfer(loByte);
  digitalWriteFast(sLtch, HIGH);
 
  digitalWriteFast(wE, LOW);
  digitalWriteFast(cE, LOW);
 
  digitalWriteFast(io0, data[0]);
  digitalWriteFast(io1, data[1]);
  digitalWriteFast(io2, data[2]);
  digitalWriteFast(io3, data[3]);
  digitalWriteFast(io4, data[4]);
  digitalWriteFast(io5, data[5]);
  digitalWriteFast(io6, data[6]);
  digitalWriteFast(io7, data[7]);
 
  __asm__("nop\n\t"); 
 
  digitalWriteFast(wE, HIGH);
  digitalWriteFast(cE, HIGH);
}
75
Project Guidance / Re: simple low level encrypti...
Last post by mauried - Today at 03:12 am
Cant transmit ultrasonic frequencies over a FM voice radio.
Maximum frequency is approx 4 khz.
76
General Electronics / Re: Current to motor driver?
Last post by screwpilot - Today at 03:11 am
you can drive a motor to make it spin fast with very little current
when you place it in your project it may draw way more for having torque as well
77
Hi, not raining Central Victoria,sunshine and 19.3DegC

firashelou, you are starting to get it, well done, something you can't see can be hard to explain sometimes.


Tom.... :)
78
General Electronics / Current to motor driver?
Last post by aaddcc - Today at 03:07 am
Hi all,

I found this nice motor driver that I was planning on using on some 12V DC motors with 3.6A stall current. So I understand that I won't need a full 3.6A to each motor, and I actually connected a power source and found that even 12VDC and .20-.26 A was enough to run the motor as fast as I need. What I'm wondering is, what current I would actually need to supply as motor power? Can I just say .26*3 + safety factor? The driver apparently can take up to 4A per channel, but I'm assuming I can't go ahead and provide 4*3A, because that would be crazy and probably kill me?
79
SCHEMATIC ?
I don't have one.  It's basically this, with the SSR as a gate in between the circuit.

Like I said, it works just not as sensitive as it would be. No resistors in place.  Components are listed above.

http://arduino.cc/en/uploads/Tutorial/ExampleCircuit_sch.png

Maybe you would like to use an accelerometer.  It will be more sensitive than a piezo I think.
Thanks for the suggestion, I will look into it.
80
Sensors / Re: A good Mini rotary encoder
Last post by jremington - Today at 03:05 am
These are very nice: http://www.digikey.com/product-detail/en/ENS1J-B28-L00256L/ENS1J-B28-L00256L-ND/1089392
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