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31  Using Arduino / Project Guidance / Re: Network Monitoring of different computers on: June 06, 2013, 01:13:32 pm
How about writing data to a network address with processing that other computers on the same network can see this data just by viewing that network address or port (etc) on internet explorer or google chrome (etc)???
is this possible at all?

Thanks
32  Using Arduino / Project Guidance / Re: Network Monitoring of different computers on: June 06, 2013, 12:52:15 pm
Yes both are running windows, one is XP, the other is 7

The xp computer is very old (600 MHz and 380MB ram). I am not sure if it can take the extra processing power of remote desktop...

Writing to a network disk is a good idea, but its not ideal where I am...

Any other ideas??

Thanks
33  Using Arduino / Project Guidance / Network Monitoring of different computers on: June 06, 2013, 12:18:45 pm
Hello,

I am running 2 testing system on 2 different computers that are on a local network. The testing systems consist of an Arduino that is the interface between some hardware and computer. The computer program is in processing. Each system is a datalogging application; the arduino tests some hardware and sends data to computer and the processing is analyzing and saving data from time to time... (meaning not always and not on every test).

Here is what I want to do and I am looking for ideas...
Given the 2 systems, I want to be able to monitor the 2 systems from a third computer on the same local network. I want this to be in way that this monitoring application does not interfere in any way with either of the test systems. The network monitoring should just indicate in some way whether or not the test system is running normally.

Any idea?
Please also ask question... I tried explaining as best as I could...

Thanks
34  Using Arduino / Programming Questions / Re: Minimum System Requirement + Some Problems on: June 05, 2013, 03:04:28 pm
That the thing...

The whole point of this program is datalogging... I am running it at 57600 baud. That is the slowest I can have, otherwise my data will be corrupted when PC reads them. I tried this...

So, No I cant bring the baud down...

Any other ideas?

Thanks
35  Using Arduino / Programming Questions / Re: Minimum System Requirement + Some Problems on: June 05, 2013, 02:33:01 pm
Thanks for the replys,

I am running WinXP on this old thing...
The thing is the arduino IDE and processing IDE boot up nicely and I have no problem programming the arduino...

The problem is this: the arduino is receiving data and immediately sends back some data. Processing is sending data and is waiting to receive data from Arduino. Sometimes the processing misses the received data and waits forever...
Is it possible that the arduino is doing things faster than the computer, considering all the things that the computer is running? Or is it that the serial port is kinda slower than the arduino? Doesn't the computer have some kind of serial buffer or something similar???

Thank you again
36  Using Arduino / Programming Questions / Minimum System Requirement + Some Problems on: June 05, 2013, 10:58:24 am
Hello,

I was wondering if there is a minimum system requirement to run Arduino IDE?
I am actually having problem with a 600MHz machine (380MB RAM). I am running both arduino and processing IDE at the same time. processing and arduino are talking to each other (sending and receiving data). This program sometimes just stops working for reasons I dont understand and cant pin-point... The same code works on a 2.2GHz quad core (8GB RAM) with nothing to worry about. So I know for sure its not the code that is causing the problem.
On the older machine, when I open the task manager, I have noticed the processor shoots up to 100% when the code is running and the ram is at full capacity...
The problem happens randomly, but in all cases its when processing is sending something and waiting to get something back, which never arrives and the system just stops working.
Has anyone experienced this before? Solutions???

Thanks
37  Using Arduino / Project Guidance / Re: System stalls on sending and receiving data on: June 04, 2013, 11:33:48 am
Hi and thank for the reply,

So the protocol is something like this:
The arduino is waiting on serial port and wants to receive 4 integers.
The processing sends these integers.
Arduino gets them. Arduino samples 3 sensors and sends all the received data and sensor data back with new line character at the end (println)
serial event gets activated by the new line character ( serial.bufferuntil(\n); ) and reads everything in the serial port. This data gets broken up into pieces and gets checked against the original data that was sent. processing will then send a 'N' character and waits for 1 second.
Arduino receives this 'N' and the whole thing repeats over and over...

The system usually stalls on the slower computer (600MHz)... I dont know WHY???

Thanks
38  Using Arduino / Project Guidance / System stalls on sending and receiving data on: June 04, 2013, 10:43:49 am
Hello,

I am running a datalogging program I wrote on Arduino and Processing forgive me if I cant share it because of IP.
In one section of the code, Processing is sending data to arduino. Arduino copies the data, adds 3 more data to it and sends all back for the processing to check them. This send and receive happens very fast.
This code works beautifully on a 2.2GHz Quad core computer, but it sometimes stalls on a 600MHz computer (I know its old).
My questions is that is there any limitation on the computer speed running the processing program?

Thanks
39  Using Arduino / General Electronics / Re: Signal Noise caused by PWMing on: May 30, 2013, 01:33:50 pm
I can drop the voltage to 9V for the Arduino, but I need 12V for one of my sensors. And if the 12V line is fluctuating, then the data from that sensor will be unreliable.
So... we are back to the beginning: to filter out the 4 KHz noise from the 12V line caused by PWMing...

Any thought?

Thanks
40  Using Arduino / General Electronics / Re: Signal Noise caused by PWMing on: May 30, 2013, 11:53:21 am
I cant really drop the voltage to 9V, because one of my sensors needs 12 V to operate.

Is there a way to condition the 12V before giving it to Arduino and sensor board? is there such thing as 12V to 12V regulator?

Thanks for your reply. 
41  Using Arduino / General Electronics / Re: Signal Noise caused by PWMing on: May 30, 2013, 11:19:08 am
The power supply ground goes to a grounding block. The grounding block received all the grounds: the sensors, the high current components, and the arduino.

No, the high current wires are separated by a fair distance from the sensor wires...
42  Using Arduino / General Electronics / Signal Noise caused by PWMing on: May 30, 2013, 11:02:31 am
Hi,

I have a big problem which I cant quite figure out how to get around it.
I am PWMing pin 10 of Arduino Mega at 4 KHz which is driving a gate driver and that is driving a N-Channel mosfet, and the mosfet is switching a low resistance (0.5 Ohm) load at 12V.
I am supplying the power for arduino and my sensors from the same 12V. There are chokes and big capacitors (3300uF) and small capacitor (10uF) to filter out the noise on the 12V line before getting into the Arduino.
However I am still seeing a lot of noise in the sensor data.

What more do i need to do to fully suppress this noise?

Thanks
43  Using Arduino / Project Guidance / AC or DC Heating of a wire on: May 13, 2013, 11:53:06 am
Hi,

I am working on a project that the goal is to heat a piece of 20cm wire to 100 degrees C as fast as possible (100ms) and the power source being a 12V lead acid battery. The 20cm wire has a resistance of ~1 ohm.
My question is:
- What heating method would be more effective? AC or DC? DC would be like shorting the battery with a MOSFET switch. AC would be like using an inverter. (note: the accompanying electronics should be small size)
- What do you think of a step up converter and shorting the wire with a higher voltage?

Please share your ideas of what would work best and more effective (fastest)...
Thanks
44  Using Arduino / General Electronics / Re: IC with internal tempreture sensor and analog output on: April 16, 2013, 12:56:03 pm
after looking at the data sheet, I noticed that the thermal response is very slow for my application.

is there any other IC package with better thermal response??

Thanks
45  Using Arduino / General Electronics / Re: IC with internal tempreture sensor and analog output on: April 16, 2013, 12:03:33 pm
Sorry, found my own answer

LM35
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