Daanii:
MarkT:
What is the load?I need to send a signal of between 0 and 12 Volt to an electric-over-hydraulic trailer brake.
If there's a datasheet for the device it would be really re-assuring to see it - I don't know how such a thing works and what sort of frequencies of PWM are suitable.
Also automotive devices often are permanently connected to the chassis/ground and can only be switched on the high-side - if this is so you'll need a PNP or p-channel device to switch and some kind of level-shifting circuit to control this from the Arduino.