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Author Topic: Serial port and voltage  (Read 6543 times)

Skylined

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Serial port and voltage
« Reply #10 on: July 26, 2003, 11:21:27 AM »

If you are using a voltmeter be carefull because it meassures RMS voltage.
You should better use an osciloscope to see what's happening.
You can take a singnal from the Data or Clock pins of the com.
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bleo8onhs

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Serial port and voltage
« Reply #11 on: July 27, 2003, 03:15:19 AM »

I dont understand. And what readings a osciloscope will give me that will help?
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Skylined

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Serial port and voltage
« Reply #12 on: July 27, 2003, 12:47:36 PM »

With an osciloscope you'll see al that's happening, with a voltimeter you cannot see many lil and not so lil things.
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LordZuul01

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Serial port and voltage
« Reply #13 on: August 03, 2003, 09:56:22 AM »

I have a different idea... What if you used a serial loaded bcd or binary to decimal encder ... Its very late, so I don't really feel like searching for part number right now... But basically, you can send pulses through say RX to set the value, and the RTS reset the counter to zero...
 To do voltages, you could use a serially loaded DAC to make the voltages... I would have done this with the parallel port... Then it would just be a 1 to 1 relationship between IO and value. PM me if you want ideas on how to do this... I have converted a fuel gauge from a car to indicate CPU usage ... Theres another idea for you... LZ
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bleo8onhs

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Serial port and voltage
« Reply #14 on: August 03, 2003, 12:46:09 PM »

I cant pm yet so can you give me an email? :)
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