What is the current draw of each solenoid.
If you don't know, then measure coil resistance.
That 500mA rating of the ULN chip is for a single coil.
That drops to less than 100mA for eight.
Leo..
What is the current draw of each solenoid.
If you don't know, then measure coil resistance.
That 500mA rating of the ULN chip is for a single coil.
That drops to less than 100mA for eight.
Leo..