Wond3rboy
Member
Hi i know this is kind of emberassing but i want to know how a pull up resistor works cause if i put a pull up resistor to RA4 of a 16F628a then it just keeps the LED at a constant high voltage turning it on.How does any IC with an open collector or open drain o/p assert control using a pull up resistor.This was done in Proteus.
Thanks.
Thanks.