Posted on Feb 6, 2014

This simple PC parallel port ADC has 12 b resolution, four differential input channels and is it`s quite fast; the chip itself ( MAX186 ) is able to go up to 133 ksamples/s, but the actual speed will be determined by the software used. I wrote a simple C program to test the ADC with Linux; it acquires a selectable number of samples (default 1000 s

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amples for every channel) and computes the acquisition time and the mean values and variances for the four channel readings. Tested on a PC with a 333 MHz AMD K7 processor this circuit had a throughput of about 2. 5 ksamples/s

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