Arduino Forum

Using Arduino => Project Guidance => Topic started by: SoAgg159 on Jul 18, 2013, 02:49 am

Title: Reading VDC and sending info wireless?
Post by: SoAgg159 on Jul 18, 2013, 02:49 am
I have a little project I'm looking to complete but wanting to keep the costs down. I would like to take a voltage reading (under 5 volts, though if there is a spike I'd like to be safe) and have that information sent wireless to another screen. How would I go about doing this? From my understanding I will need;

-2 Ardunio's R3
-2 Wixels
-Wixel Shield
- Voltage Divider
- Screen
- Misc wires and power supply

Is there any other way by doing this method cheaper? I noticed this http://www.semifluid.com/2012/09/09/arduino-fio-internal-voltmeter-and-thermometer/ (http://www.semifluid.com/2012/09/09/arduino-fio-internal-voltmeter-and-thermometer/) which I what I would like to do, but not exactly sure if that is what I'm looking for. I appreciate any help, unfortunately I'm new to this so please bare with me. 
Title: Re: Reading VDC and sending info wireless?
Post by: Robin2 on Jul 18, 2013, 09:37 am
You might also consider using Moteinos http://lowpowerlab.com/moteino/ (http://lowpowerlab.com/moteino/)  or DelTinos http://www.deltino.com/ (http://www.deltino.com/) both of which have the wireless built in. The DelTino also includes a voltage divider so it can read its own supply voltage - which can be from 3v to 16v.

I haven't tried the Moteino myself.

...R
Title: Re: Reading VDC and sending info wireless?
Post by: Coding Badly on Jul 18, 2013, 09:45 am
I would like to take a voltage reading (under 5 volts, though if there is a spike I'd like to be safe)


Down to zero volts?

Quote
...and have that information sent wireless to another screen.


Distance?  Obstructions?

How will the remote node be powered?

Quote
I noticed this http://www.semifluid.com/2012/09/09/arduino-fio-internal-voltmeter-and-thermometer/ (http://www.semifluid.com/2012/09/09/arduino-fio-internal-voltmeter-and-thermometer/) which I what I would like to do, but not exactly sure if that is what I'm looking for.


That reads the supply voltage (Vcc).  Is that what you want to do?

The reading is not linear.  At one end of the range you will have significantly more resolution than at the other.
Title: Re: Reading VDC and sending info wireless?
Post by: SoAgg159 on Jul 18, 2013, 04:46 pm

You might also consider using Moteinos http://lowpowerlab.com/moteino/ (http://lowpowerlab.com/moteino/)  or DelTinos http://www.deltino.com/ (http://www.deltino.com/) both of which have the wireless built in. The DelTino also includes a voltage divider so it can read its own supply voltage - which can be from 3v to 16v.

I haven't tried the Moteino myself.

...R


Thanks Robin, I'm looking to read 0-5volts. I've found an article that shows that the arduino can read about 5volts max, but voltage dividers are only a few bucks more so I might go with that.


I would like to take a voltage reading (under 5 volts, though if there is a spike I'd like to be safe)


Down to zero volts?

Quote
...and have that information sent wireless to another screen.


Distance?  Obstructions?

How will the remote node be powered?

Quote
I noticed this http://www.semifluid.com/2012/09/09/arduino-fio-internal-voltmeter-and-thermometer/ (http://www.semifluid.com/2012/09/09/arduino-fio-internal-voltmeter-and-thermometer/) which I what I would like to do, but not exactly sure if that is what I'm looking for.


That reads the supply voltage (Vcc).  Is that what you want to do?

The reading is not linear.  At one end of the range you will have significantly more resolution than at the other.


Correct, my readings will be from 0-3volts, but if there is a spike I would like to have a save zone of about 25volts or so. The distance will be anywhere from 1-15ft with no obstacles in the line of sight. I was planing on using batteries to power both systems.

I believe I have found what I am looking for in this link here http://startingelectronics.com/projects/arduino-projects/arduino-4-channel-LCD-voltmeter/ (http://startingelectronics.com/projects/arduino-projects/arduino-4-channel-LCD-voltmeter/). However I am wanting to have the info that is read sent wireless to the screen.
Title: Re: Reading VDC and sending info wireless?
Post by: Robin2 on Jul 18, 2013, 07:46 pm

Thanks Robin, I'm looking to read 0-5volts. I've found an article that shows that the arduino can read about 5volts max, but voltage dividers are only a few bucks more so I might go with that.


The DelTino can also read voltage on an external ADC pad which would allow reading voltages that are separate from the device's power supply. The AVR328 on DelTino's runs at 3v.

...R
Title: Re: Reading VDC and sending info wireless?
Post by: Coding Badly on Jul 18, 2013, 09:06 pm

Some things to research for managing the spike...
https://www.google.com/search?q=arduino%20protecting%20an%20analog%20input
http://forum.arduino.cc/index.php/topic,5410.0.html
http://www.thebox.myzen.co.uk/Tutorial/Protection.html
Title: Re: Reading VDC and sending info wireless?
Post by: Coding Badly on Jul 18, 2013, 09:07 pm
Quote
I was planing on using batteries to power both systems.


With or without a voltage regulator?
Title: Re: Reading VDC and sending info wireless?
Post by: SoAgg159 on Jul 19, 2013, 12:06 am
I believe everything has been answered through this link. Took awhile for me to find it, but I believe this is what I'm looking for. Thanks for your help guys. http://www.instructables.com/id/Androino-Talk-with-an-Arduino-from-your-Android-d/ (http://www.instructables.com/id/Androino-Talk-with-an-Arduino-from-your-Android-d/)