I want to drive number of relay with arduino mega and try to driver through 74HC245 (SN74HC245DWR) which drive ULN2803A and than 12V relay. everything working as normal
Only issue is " Relays are flickering during initial power up after that work as normal. I am not well aware of 74HC245. If some one can help out to solve the issue. specially for connecting OE pin.
schematic and chip data sheet are attached.
Software side I confirm by removing the arduino mega and power up only gpios layer but same issue observed.