Re: How to disable internal pull up resistor before user cod
Posted: Sat Sep 16, 2017 1:46 am
Please never give up on any problem ever, Sometimes I find solutions to problems when I am about to give up. I faced the same problem you have and solved it please consider the circuit which I used to solve it. This circuit is tested and working without any problems, no unwanted relay operation, the default state is relay off unless microcontroller drives it ON, I used this circuit on an 89C2051 microcontroller.