Far Han
Newbie level 6
I was working on a project that operates 8 relays using shift register and uln2803. The circuit work fine on breadboard but on PCB it didnot work. i have check it many times on Breadboard it works. but didnot work on PCB. Any help. i am using Atmega 328 standalone with 16 Mhz crystal and 33pf capacitors, 74HC595 shift register, uln2803 dalignton array,