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466  Forum 2005-2010 (read only) / Interfacing / Re: Someone to Port on: November 12, 2007, 10:55:22 pm
The creator of that does not seem to have released the source code to the pic software. I suspect the Arduino could easily be programmed to do the same thing.
467  Forum 2005-2010 (read only) / Interfacing / Re: Philips 4794 on: November 12, 2007, 10:30:50 pm
I'm not sure where in Germany you'd get them even though Phillips has factories there. You might contact Phillips and ask.

They work great!
468  Forum 2005-2010 (read only) / Interfacing / Re: big led matrix on: November 12, 2007, 10:20:09 pm
The following program will perform a knight rider function with 16 LEDs using only four lines from the Arduino. This should give you an idea of what is possible.

The wiring is from the playground page though they are a bit lacking. I'll need to write it down at some point.

Quote

/* Dual hef4794 knightrider toy
Public domain by MrMeval@gmail.com
 */

int data = 9;
int strob = 8;
int clock = 10;
int oe = 11;
int count = 0;
int dato = 0;
int ack = 13;

void setup()
{
  pinMode(data, OUTPUT);
  pinMode(clock, OUTPUT);
  pinMode(strob, OUTPUT);
  pinMode(oe, OUTPUT);
  pinMode(ack, OUTPUT);
}

void loop()
{
  digitalWrite(ack, HIGH);
  dato = 1;
  for (int i = 0 ; i < 16 ; i++){  
    shiftOut(data, clock, LSBFIRST, dato>>smiley-cool;
    shiftOut(data, clock, LSBFIRST, dato);
    dato = dato<<1;
    digitalWrite(oe, LOW);
    digitalWrite(strob, HIGH);
    digitalWrite(oe, HIGH);
    digitalWrite(strob, LOW);
    delay(50);                  // waits for a moment
    digitalWrite(ack, LOW);
  }
  dato = 32768;
  for (int i = 16 ; i > 0 ; i--){
    shiftOut(data, clock, LSBFIRST, dato>>smiley-cool;
    shiftOut(data, clock, LSBFIRST, dato);
    dato = unsigned (dato)>>1;
    digitalWrite(oe, LOW);
    digitalWrite(strob, HIGH);
    digitalWrite(oe, HIGH);
    digitalWrite(strob, LOW);
    delay(50);                  // waits for a moment
    digitalWrite(ack, LOW);
  }

}
469  Forum 2005-2010 (read only) / Interfacing / Re: Devantech RYL08 on: June 27, 2007, 10:04:07 pm
Post a link to the boards datasheet so we can see what it is.
470  Forum 2005-2010 (read only) / Interfacing / Re: Density/Specific Gravity sensing on: June 27, 2007, 09:42:44 pm
You use specific gravity to measure alcohol? If so try this. smiley-wink

http://www.futurlec.com/Gas_Sensors.shtml

Based on the sensitivity you'd want a very small sample of fluid to analyze. You may even need to dilute the sample.

I've not used them.

471  Forum 2005-2010 (read only) / Interfacing / Re: Switching off arduino on: June 27, 2007, 10:18:50 pm
A single on off on switch.

Wire the common to the pin in the center of the header that has the jumper for USB or External power.  Wire up one connection to the USB power power pin and one to the external power pin. Now you can flip the switch to use USB or external power or be off. I'm not sure but I think a three pin connector similar to the ones used on the board would allow you to solder to the connector and slide that onto the three pins on the board.

Also called:
http://en.wikipedia.org/wiki/Switch
Single pole changeover or Single pole, center off

472  Forum 2005-2010 (read only) / Exhibition / Re: Arduino Tiny on: September 25, 2010, 01:47:38 pm
ATTiny84 has SPI. I've not seen where one of these has been used with any Arduino yet.

http://www.maxim-ic.com/datasheet/index.mvp/id/2052

MAX3110E, MAX3111E  
473  Forum 2005-2010 (read only) / Exhibition / Re: NTSC video out library on: May 23, 2010, 03:35:25 pm
The LM1882 is a sync generator

same as

http://www.national.com/ds/54/54ACT715.pdf

Similar?

http://www.fairchildsemi.com/ds/74/74ACT715.pdf
474  Forum 2005-2010 (read only) / Exhibition / Re: NTSC video out library on: May 23, 2010, 03:12:24 pm
uzebox is too expensive
59.95+$34.95+10=around 105

arduino + two resistors+cable=PROFIT
475  Forum 2005-2010 (read only) / Exhibition / Rolling block code app note from atmel. on: October 05, 2010, 11:45:59 pm
http://www.atmel.com/dyn/resources/prod_documents/doc2600.pdf
476  Forum 2005-2010 (read only) / Exhibition / Re: Encryption with Arduino AES-256 and RSA-512 on: July 09, 2010, 02:48:34 am
Hey with those you can implement rolling block ciphers! Sweet!
477  Forum 2005-2010 (read only) / Exhibition / Re: Arduino Scrolling 56x8 LED matrix on: June 07, 2010, 02:25:36 am
The TPIC is the same as the 595 but it has higher current output. The code will be identical. There is another chip HEF4794 which is also a high power output chip but only drives 40ma.

The standard 595 chip will drive 1 LED per output fine but if it needs to drive more you're going to have to boost it's output.
478  Forum 2005-2010 (read only) / Exhibition / Re: DigiPot Library (MCP42X1 digital potentiometer) on: December 05, 2010, 04:23:39 pm
I can't download the library from google.
479  Forum 2005-2010 (read only) / Exhibition / Floppy edge connector as SD card socket on: June 07, 2010, 02:06:22 am
http://www.scienceprog.com/sd-mmc-card-fits-in-floppy-connector/
480  Forum 2005-2010 (read only) / Exhibition / Re: Morse Code. on: May 23, 2010, 03:50:51 pm
Oh how helpful, someone asks for help and is sent to google. If all you want to do is crap on people why are you here?

atoi sucks for beginners
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