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106  Using Arduino / Sensors / Re: Reading central heating system thermistor's? on: November 29, 2012, 11:01:57 pm
Ok, i now first order parts that i can start to build something.
But i can't find the 74LV1G125. Not at farnell, not at digikey and in no German shop...
I think it's more future prove to use the 74LV1G125 cause i want to log the data to a SD card
have the network shield and also want to build some radio control for a water-pump (enocean if possible).
Does the wire from the heating system thermistors to the MCP3204 not affect the output of the thermistors (wire resistance)?
Or the 10K resistors? Not that the heating system turns into a air conditioning systems smiley-lol

Maybe its a big thing for an Arduino beginner. But like cabinetmakers say: "start with something
you like and something you have fun with. Don't select your project by easy or difficult".

I think it's learning by doing. And if the help here is so great like yours, than we can build a machine
to take over the world *lol
107  Using Arduino / Sensors / Re: Reading central heating system thermistor's? on: November 29, 2012, 04:50:51 pm
Ok, next try smiley-grin (attachment)

And it doesn't matter which ADuM logic output i connect to which pin on the MCP?
Your Arduino pin naming is confusing me - SCLK = Pin 52 SCK?

And should i take the ADUM6401ARWZ-ND or the ADUM6401CRWZ-ND?
108  Using Arduino / Sensors / Re: Reading central heating system thermistor's? on: November 29, 2012, 10:43:24 am
Sorry but now I'm totally confused on the iso side.
Even with the MAX6145 i need the LC network?
Where to place the MAX6145?
109  Using Arduino / Sensors / Re: Reading central heating system thermistor's? on: November 28, 2012, 04:20:45 pm
Ok, here the circuit.

To i need the smoothing capacitor if i use the MAX6145?

Is the circuit correct?
110  Using Arduino / Sensors / Re: Reading central heating system thermistor's? on: November 22, 2012, 07:57:35 am
Ah, didn't know this dc-dc-converters.

Yes all thermistors have common ground.
I have 4 so i need 2 ADUM6401.

The central heating connections are:
AF1 = 0 volt ground
AF2 = outside air thermistor
KF2 = furnace thermistor
VF2 = underfloor heating water thermistor
BF2 = hot water storage tank thermistor

The ADC chip means i read the voltage on the Arduinos digital inputs?
Do you have an example circuit diagram to give me a kick-start?

For the evaluation board i think you mean this one: http://www.analog.com/en/evaluation/eval-adumqs/eb.html
But it's a little bit to difficult to get here in Germany.
111  Using Arduino / Sensors / Reading central heating system thermistor's? on: November 22, 2012, 03:00:40 am
Hi,

i want to read the temps from my central heating system.
I don't have the specs of the thermistor's but tables from the central heating manual (see attachment).
I can measure the voltages with my multimeter and if i look into the tables it looks ok.
But all thermistor reading examples i find require the usage of the Arduino voltage (voltage divider circuit).
Is there a way to read the voltages from the thermistors without coupling the central heating and Arduino voltage?

Attachment:
Table 1: furnace water temp & underfloor heating water temp
Table 2: outside air temp
Table 3: hot water storage tank (water temp)

Thanks for help in advance :-)
112  Using Arduino / Networking, Protocols, and Devices / Re: How to see Arduino in Windows network (network name) and accessing files on SD? on: January 09, 2012, 10:47:19 am
Quote
I think the first thing you'd have to do would be to install Windows on the Arduino. Good luck with that.
Why? I can see my Phone, my Router's, the TV's, Xbox's, Linux PC's in the Windows network without having Windows on them...

Quote
What kind of shield are you using?
The official Arduino Ethernet shield (cable).

Code:
Good luck with that. Most syncing software expects the two devices to be running the same OS and be on the same local area network.
Hm, my Arduino and all the other devices are on my local area network. And i can copy and move files between them all. And with Allway Sync
you can do it from Russia to China over FTP. I mean is there nothing like SAMBA or FTP for Arduino? Can't believe that i need a
PC running 24/7 to log everything via serial.
Nothing out there to just copy a file from the Arduino SDcard to a PC?

Sorry, i don't know if it's my english, but your answers sounds a little harsh to me - an Arduino newbie who is looking for help and to get started.
113  Using Arduino / Networking, Protocols, and Devices / How to see Arduino in Windows network (network name) and accessing files on SD? on: January 09, 2012, 09:20:03 am
Hello from Germany,

I'm new to Arduino and I'm missing some basic stuff.
How can i see my Arduino in my Windows network with a network name?
I can see state's of pins in Firefox via the Arduino IP, but can't see the Arduino in the Windows network.

I also can write stuff to txt or csv files on my SDcard but can't find a tutorial on how to fetch the file to a PC.
I want to build some loggers that log the data to SDcard and than fetch that file from a PC with some software like Allway Sync.
The idea is to have all the Arduino loggers running without the need for a 24/7 PC running.
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