Is this is possible, any help?

[TheOne]

Hi, i am looking for a circuit (like multimeter, or something similar) to be able to connect to the serial port of my computer.

I am coding a motor controller using paralelle port, i want to add the feature to see the volt/amp/watt used by the motor and see the output of the generator and record that via the program.

I am not an electronic expert so i dont know if its possible to do that. I hope its possible!

Any help would be appreciate?

When the program will be finished i will give for free!

[gast]

Hi TheOne,

there are some multimeters on the market with an serial port for connecting it
to a pc (like this one: http://www.fabian.com.mt/tnm/ut70b.html).
Mostly they are shipped with an special PC-programm for saving the measured data, doing long time measurements and so on...

But dont ask me how to read out the meassured values in an own program. :-(

Regards, Gast

[TheOne]

yeah but i have already one, and i heard this kind of multimeter are slow with serial port like one update per second. And you need to play with the multimeter to select what you want.

I want something more custom, and if my program use that, nobody will able to use unless they buy the same multimeter.

Using a simple circuit, poeple will able to contruct it with less money

I found that http://www.qsl.net/zl1bpu/micro/SerialDVM/AVRDVM.htm but i am not sure
if that can do the job.

But something like that ro similar to that i am trying to find

Thanks anyway!

[TheOne]

maybe i need to find 2 circuit like voltmeter + ampmeter

so the program will talk to the motor controller using the parallel port + voltmeter (serial port) + amp meter using an another serial port

i just need to find out a amp meter using serial port now, the only i did not find yet!

Any help?