I want to use a micro (PICAXE) in an automotive environment. My main concern is interfacing inputs (which can vary from 10-15V and may contain transients much higher - up to 50-60V).
I thought of using a resistor divider with a zener. Does this sound OK, or will the 50-60v transients be too much? BTW, not all inputs would have such large transients (only the inductive loads), so if it's too expensive then I could use different protection for different inputs.
I thought of using a resistor divider with a zener. Does this sound OK, or will the 50-60v transients be too much? BTW, not all inputs would have such large transients (only the inductive loads), so if it's too expensive then I could use different protection for different inputs.