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226  Forum 2005-2010 (read only) / Interfacing / phone and Arduino some progress but need help on: August 23, 2008, 04:08:55 am
Hello

At the moment I'm trying to get my Sony Ericsson working on the Arduino.
So what have I done:
I got a Serial cable for the phone. I plugged it into my PC and connected through the Terminal. At commands work great. The I cuted the cable to see the wires. Ok there were 6 wires. But 3 where useless.
I got now 3 cable to the serial port and it does still work. I found out that one is the RX cable. (To test that I sent the code to turn off the phone. First with this cable connected and the disconnected this cable. Both time it worked but once I didn't get the OK message from the phone so it should be the RX cable… Should be right or did I miss something?)

Now how do I detected the Ground cable and the TX? ok 3 cables so 50:50 smiley

But one of the important question:
When I like to connect the phone with those 3 wires to the Arduino do I have to use a Serial to TTL converter? I think so because as I tried to connected my Garmin GPS I had to use this as well… or am I wrong


Thx,
Geko
227  Forum 2005-2010 (read only) / Interfacing / Re:  Thermocouple on: October 01, 2008, 02:35:20 pm
Would be very nice!

In another thread you've mentioned that you've used a balloon for something. Did you also measure the temperature at high altitude?


Thx
Geko
228  Forum 2005-2010 (read only) / Interfacing / Thermocouple on: October 01, 2008, 11:07:09 am
Hy

How can I connect a  T-Thermocouple ([ch8722]185C to +300C) to arduino?
Maxim doesn't sell those kind of converter or did I miss something?

Thx
Geko
229  Forum 2005-2010 (read only) / Interfacing / Re: Temperature Sensor on: October 03, 2008, 09:23:45 am
-55 deg is more or less enough -80 would be much better but I haven't found a solution for the arduino yet to measure that low temperature...
Do you have any ideas?

Geko
230  Forum 2005-2010 (read only) / Interfacing / Re: Temperature Sensor on: September 26, 2008, 01:29:59 am
hmm Ok thx a lot...
I got the DS18B20 and this one goes to -55C..

I have to checkout those Thermocouples...

Thx
Geko
231  Forum 2005-2010 (read only) / Interfacing / Temperature Sensor on: September 24, 2008, 04:01:51 pm
Hello

There are a lot of temperature Sensor that can measure high temperature but I do need one that can measure low temperate at around -70 Celsius.
(It should be accurate between +30 and -70 Celsius)
Does someone know one?

Thx
Geko
232  Forum 2005-2010 (read only) / Interfacing / Re: Temperature Sensor DS18B20 and producing some heat on: October 01, 2008, 11:07:49 am
Thx for the advise! I will check those Heat Sinks...

Geko
233  Forum 2005-2010 (read only) / Interfacing / Temperature Sensor DS18B20 and producing some heat on: October 01, 2008, 09:20:00 am
Hello

I got two questions so:
1.
Does someone have experience in using the DS18B20 Temperature Sensor? I tried measuring the Temperature
in our fridge. It took over 20 minutes to measure the right temperature.
Could the reason be that in the fridge is no Air that circulates around the sensor? Or is it something different?

2.
I do need my Arduino in a very cold environment (-30C). I will put it into a Styrofoam but I have to produce
some heat inside this case. I do use a 2s Lipo so how can I produce enough heat so that the Lipo is not freezing smiley ?

Thx
Geko
234  Forum 2005-2010 (read only) / Interfacing / Re: How to measure Lipo voltage? on: September 22, 2008, 03:06:34 pm
Sorrry does work a cable was in the wrong place smiley

Geko
235  Forum 2005-2010 (read only) / Interfacing / Re: How to measure Lipo voltage? on: September 22, 2008, 02:43:41 pm
Hmm got an other problem. As I said it does work
I testet the 5v output of the Arduino so I got a stady
Voltage. But as I tried a 7.4v (2s) Lipo the Value jumps!
hmm what's the matter?

Geko
236  Forum 2005-2010 (read only) / Interfacing / Re: How to measure Lipo voltage? on: September 22, 2008, 02:25:46 pm
Great! Thx!
So it looks now like that:
Vbattery
|
R1
|
--------------  Arduino analog pin
|
R2
|
Ground

It does work great. So now I have to get the Voltage
when the Arduino will switch off... Let's check this..

Geko
237  Forum 2005-2010 (read only) / Interfacing / How to measure Lipo voltage? on: September 22, 2008, 01:51:16 pm
Hello

I got a project running and it would be nice to
read with the Arduino the current Voltage of
the Lipo which is powering the Arduino.

Is there any way I can do that?

Thx
Geko
238  Forum 2005-2010 (read only) / Interfacing / Arduino + Logomatic Serial SD Datalogger on: August 11, 2008, 05:27:28 am
Hello

Does someone have experience with the Arduino and a Logomatic Serial SD Datalogger?
Can you really just write analog sensor values trough the TX port to the RX port of the Data Logger?
Can you even read from it?

Best regards
Andy
239  Forum 2005-2010 (read only) / Interfacing / Re: connect nokia to arduino through cable on: August 27, 2008, 12:14:02 pm
Quote
the ftdi driver isnt a usb host, you wouldnt be able to connect it like that. what sounds plausible would be to crack it open, find the serial converter, and tap the lines before it goes to the usb interface. probably alot more work than its worth.

thats the way it does work. I built now my own connector...

Geko
240  Forum 2005-2010 (read only) / Interfacing / Re: Garmin GPS on: August 14, 2008, 12:35:28 am
Quote
Methinks you are getting "pool" and "poll" confused.
i mean poll data... sorry for my bad english!
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