Hello everyone,
I want to connect a number of push (to make unlocking) buttons and some switches on the ports of 8051 micro. These buttons/switches should give an active high on the pins of the micro. I was instructed to use some pull up resistors, however, i had never had any analogue electronics experience before and from a search i made on the net, i couldn't find any schematic on how to do that. If anyone has any schematic on how to connect those switches and resistors on the pins of the 8051 i would be really delighted. Thank u in advance for your help.