Member level 3
Hi I'm new to electronics and have never done any project. I'm just wondering if anyone can HELP on how to start/begin using MC74HC595 and ULN2003. I tried following the schem diagram for SPI Inetrface BIG 7 Seg LED by Wichit Siri but can't seem to have it working. Maybe I need to understand it further. What is "uC I/O" ? Any asistance will be appreciated.