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Graphics Interchange Format  |  1996-07-02  |  25KB  |  531x385  |  4-bit (16 colors)
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OCR: 10uF +-5V tantalum 10KS INPUT 20 STROBE 0-5V 6 19 D7 ADC DE 0803 13 05 10k≤2 14 D4 To 15 D3 PC Parallel 16 D2 Port 4 D1 18 -> DO 150 pF 1 2 7 8 10 3300 GND Figure 5 - The ACDC0803 analogue-to-digital converter works as well with bidirectional parallel ports as with 8-bit microprocessor buses. The potentiometer varies the input voltage, for testing. (The ACDC0803 can be replace by an 0801, 0802, 0804 or 0805.)