Laptop based voltage monitoring

Discussion in 'The Projects Forum' started by JonR, Oct 3, 2008.

  1. JonR

    Thread Starter New Member

    Oct 3, 2008
    1
    0
    Let's start out that I'm VERY new to this. I really have no idea as to what I'm doing, I just have an idea.

    I'd like to build a simple circuit that would allow me to monitor the voltage & current of external devices, in which a Laptop computer could display/chart the data realtime via USB? Ethernet?

    The capabilities would, ideally cover everything from low voltage of under 5VDC/800ma to voltages and currents up to 220VAC/60amps. However, for my immediate needs, I'm looking for 12VDC up to 4amps.

    I suppose I could tap into a multimeter, but I have no idea where, nor do I have any idea how to monitor it using a PC.

    Thanks in advance!
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. Papabravo

    Expert

    Feb 24, 2006
    10,177
    1,799
    I have seen actual multimeters with RS-232 serial ports on them. Connecting one to a PC is a complete no brainer. You can gather readings with a terminal emulator like HyperTerm, TeraTerm, or similar programs.
     
  4. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    I have a Radio Shack with an RS232 port, never used it, but it's there. They still sell them unless I'm mistaken.
     
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