I want to build a device whose primary function is a voltmeter without a display. Instead of having a display I want it to interface with a smart phone via bluetooth to read the voltage. Optionally I would like to be able to press a button on the phone and shut off the circuit for a couple of seconds and turn it back on, all while still sending the readings to the phone.

I need millivolt resolution with a range of ±5V

How could I go about doing this?

I'm a programmer that's pretty new to EE, so please dumb it down if you think I won't understand. Thanks!


closed as not a real question by Olin Lathrop, Leon Heller, Nick Alexeev, Dave Tweed, Brian Carlton Nov 26 '12 at 19:12

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. If this question can be reworded to fit the rules in the help center, please edit the question.

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    \$\begingroup\$ It believe you will get a better answer if you add some more specifics. What is the application? What is the range of voltages you expect to be measuring? What technologies have you considered so far. That type of thing. \$\endgroup\$ – Brandon Bailey Nov 24 '12 at 13:55

Without any of those specifics and with your statement that you are pretty new to EE you might want to start by taking a look at Arduino. There are a lot of examples, modules, and a great support community our there in the Arduino world and it is great for people learning the EE side of things.


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