Hi, i need to convert analog signal from sensors inorder to send it to pc, but i cannot find any type of ADC in my country(Ethiopia) but finally i found TDA1541A DAC. Then i planned to use pc as binary counter via parallel port to feed to the DAC, and op-amp as comparator of DAC output and signal from sensor. Using this method i may use DAC TDA1541A. So please tell what wrong if i use this method THANKYOU!