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1  Forum 2005-2010 (read only) / Interfacing / Re: Duemilanove + LM35 temp sensor -TO- Pachube ? on: October 31, 2010, 10:24:13 am
I have already done the exact thing u r trying to do. Code and other documentation can be found at www.hardikpandya.com smiley
2  Forum 2005-2010 (read only) / Interfacing / GLCD not showing any characters on: December 08, 2010, 04:34:36 pm
Hello all,
I am using a Duemilanove and 128 *64 GLCD but I am unable to start my GLCD - bought from sparkfun. I have the backlight on after the connections but I am not getting any characters printed on it at all. This is my GLCD: http://www.sparkfun.com/products/710
I have made connections as shown for Panel A here: http://www.arduino.cc/playground/Code/GLCDks0108
Despite the connections and hour-long efforts, nothing at all. I have tried several libraries like KS0108 and GLCD library. But so far, i m unsuccessful.

Please help me out here folks.
3  Forum 2005-2010 (read only) / Interfacing / Re:  Does CO2 sensor require large pre-heating? on: December 10, 2010, 04:57:23 am
i have started getting the readings but it has not stabilized yet. Still fluctuating a lot. Any suggestions please...!
4  Forum 2005-2010 (read only) / Interfacing / Re:  Does CO2 sensor require large pre-heating? on: December 09, 2010, 02:35:22 pm
i m thinking of arranging the sensor with the operational amplifier having a large input impedance, an arrangement of similar kind is also shown in the datasheet of Figaro sensor. Should that work perfectly since op-amp will be a large 100 GOhm device? i think it should work. what would u suggest?
5  Forum 2005-2010 (read only) / Interfacing / Re:  Does CO2 sensor require large pre-heating? on: December 09, 2010, 10:48:32 am
its a simple connection between sensor and my board. no extra ICs used. i have directly hooked up the wires to the sensor from board with the analog input taken from one of the pins of the sensor. i did test the sensor by breathing near it and it showed some fluctuations which varied very quickly i dont know y. maybe i need to warm it up for 12 hours. dont know the problem though.
6  Forum 2005-2010 (read only) / Interfacing / Re:  Does CO2 sensor require large pre-heating? on: December 09, 2010, 10:22:09 am
unfortunately i m using the bare sensor and not the whole board. i am not sure about the connections as well. If you know of the connections, please let me know. currently i have connected it according to the ones i have written in the first post.
7  Forum 2005-2010 (read only) / Interfacing / Re:  Does CO2 sensor require large pre-heating? on: December 09, 2010, 10:09:02 am
okay. i will have it connected with heater voltage 5 V for about 12 hours. lets see what happens after that. I think i should get a steady voltage output from the sensor after that period.
8  Forum 2005-2010 (read only) / Interfacing / Re:  Does CO2 sensor require large pre-heating? on: December 09, 2010, 09:55:40 am
no. its been 3 hours almost. now. Should i heat it for 12 hours really? i mean i thought it should be up for measurement in about an hour or so.
9  Forum 2005-2010 (read only) / Interfacing / Does CO2 sensor require large pre-heating? on: December 09, 2010, 09:18:43 am
Hello all,
             I am using a figaro CO2 sensor as the one shown here: http://www.figarosensor.com/products/4161pdf.pdf
I have it connected for almost an hour now but no fluctuations for the concentrations at all yet. I am using the code given below:

Code:
int  pin=14;
unsigned long duration;

void setup()
{
pinMode(pin, INPUT);
 Serial.begin(115200);
}
void loop()
{
unsigned long ppm; // adding for clarity

duration = pulseIn(pin, HIGH); // get the raw reading
ppm = duration - 177000UL; // subtract the 'zero point'
ppm /= 500UL; // divide by the gain
ppm += 350UL; // add the zero point back in

Serial.print("  PPM Co2: ");
Serial.print(ppm,DEC);
Serial.print("  Raw Sensor: ");
Serial.println(duration,DEC);
}

can anyone guide me what to do? is the sensor not heated yet?
My connections are:
Sensor pin 1 and 4 => +5 V and 0V
sensor pin 2 and 3 => analog 0 and 0V

I think I may not have made correct connections. Please help.
 :-/
10  Forum 2005-2010 (read only) / Interfacing / Re: GLCD Character display problems on: December 10, 2010, 12:08:42 am
smiley again pity.
11  Forum 2005-2010 (read only) / Interfacing / Re: GLCD Character display problems on: December 09, 2010, 06:39:44 am
pity being a god member. smiley-razz
12  Forum 2005-2010 (read only) / Interfacing / Re: GLCD Character display problems on: December 09, 2010, 06:29:24 am
how many from those 7854 posts are like those stated above?
13  Forum 2005-2010 (read only) / Interfacing / Re: GLCD Character display problems on: December 09, 2010, 02:01:29 am
maybe you could just have posted the solution rather than a word of advice.
14  Forum 2005-2010 (read only) / Interfacing / GLCD Character display problems on: December 08, 2010, 04:38:05 pm
Hello all,
I am using a Duemilanove and 128 *64 GLCD but I am unable to start my GLCD - bought from sparkfun. I have the backlight on after the connections but I am not getting any characters printed on it at all. This is my GLCD: http://www.sparkfun.com/products/710
I have made connections as shown for Panel A here: http://www.arduino.cc/playground/Code/GLCDks0108
Despite the connections and hour-long efforts, nothing at all. I have tried several libraries like KS0108 and GLCD library. But so far, i m unsuccessful.

Please help me out here folks.
15  Forum 2005-2010 (read only) / Interfacing / Re: LM35DZ temp readings when powered from battery/USB on: December 03, 2010, 10:28:27 pm
check it out here on hardikpandya.com. i have done the same project as you and you might find something worthy.
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