Simple PC data acquisition circuit

Simple PC data acquisition circuit

If you need to add simple data acquisition capabilities to your PC, then look no further; the Analog Interface Unit (AIU) is your best choice. An AIU is a simple circuit that connects to the PC's parallel port, allowing you to sample and output 8-bit analog signals under software control.

Here are some features:

* 8-bit analog-to-digital converter (ADC) and digital-to-analog converter (DAC)

Power supplied from the parallel port

* 1 megohm input impedance.

* Software-selectable +/-1.25V or +/-2.5V input and output ranges.