ADC ADC is used to convert an analog input voltage to its digital equivalent. ADC chip family is ADC080X from National Semiconductors. Some of the ICs are: ADC-0800, ADC-0804: singly analog input channel and 8-bit out bits ADC-0808 and ADC-0809: These are eight analog input inputs with 3-select lines used to select one of eight channel. It also has 8-bit digital output. ADC-0816 : It is an 16-input channel and gives 8-bit digital output signal.   Why Analog to Digital Signals in the real world are analog: light, sound, temperature, pressure, acceleration or other phenomenon. So, real-world signals must be converted into digital, using a circuit called ADC (Analog-to-Digital Converter), before they can be manipulated by digital equipment. When you scan a picture with a scanner what