Thanks winstn60, I will use this. I also found this little gem on ebay. It should look good on the front of my bot. http://www.ebay.com/itm/150707159819?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Thanks so much for the clarification. Now I've got another question: Is there an easy way to add ammeter functionality? I'm trying to come up with cool stuff to push to an LCD panel tiggered by a voice-activated "Status Report" command.

Yes, what you need is a current sensor board for a micro controller, meaning something with a 0-5V output, like these from eBay:

For 5A max in/out For 20A max in/out For 30A max in/out Pay attention to the 3-pin connection on these, they're in a different order than on the EZ-B.

For higher amps, I would go non-invasive with one of these guys: Non-Invasive Hall Effect Current Sensors

@bret.tallent

so......i want one of those....i see it has a 3 pin connector. can you maybe post up some pics on your set up once you get it going. this would look perfect in front of my wall-e

@winstn60 I searched and came across this older question, and hoped you would be able to assist again. I would like to do the same thing for voltages up to the maximum that the EZ-B would take (18v). On the EZ-B there are four pins that provide 5v, GND, GND, and Vin (the voltage powering the EZ-B).

I am already using the 5v pin to AD0 and using ACD READ to show me what the voltage load is like when I am testing things out.

I would like to do the same thing for the Vin to AD1 and add another ADC READ showing me the incoming voltage to the EZ-B. How would I go about determining the value of the resistors I would use for say 12v-18v?

Or perhaps, someone could tell me what is the technical term for this circuit and I could Google it to check out myself. Thanks

Hmmm, well I think I answered my own question... sometimes just taking the time to ask gets my brains a function'n It is called a resistor ladder (I think) and after playing around with a neat electronics simulator app called EveryCircut for my Android, I was able to take my limited electronic comprehension into a practical level. I need to do more then change resistor values, in fact I don't need to change them at all, rather I need to add a 2nd "rung" to drop the voltage again to within 5v (from 18v).

It might even be simpler then this... If someone knows more, please enlighten me... sometimes I know just enough to be dangerous

@Gunner not been around so didn't see your post til now

The 2 resistor circuit is called a potential divider which in your circuit is neatly cascaded into two potential dividers. Although I would expect 18v to be divided by 2 so instead of 7.2v you would get 9volts and then 9 divided by 2 you would get 4.5volts. So within tolerance for the EZ-B. The current flowing through the resistors should be the same though in each arm. Best to build it and see what you get with a voltmeter before you connect it all up. Great way of learning stuff))

Gunner love the app EveryCircuit that will come in very handy