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Hi,
i have interfaced ADC0808 with AT89c51 and i m surprised to see the IN0 pin of ADC shows 2.5V. I have not connected any sensor to it.
I like to know whether it usually shows this voltage or is there any problem with my circuit.
Moreover i see the digital values toggling randomly from 0-255 and if i ground that pin it shows 114.
can anybody help me rectifying this problem.
What do yuo mean by that?
"Open-Drain" is usually used for outputs, not inputs...