First time post here, I’ve designed a simple circuit to offer some protection to my Arduino. Here is a simplified drawing, forgive me if its unreadable not really a electronics guy. Can someone offer a sanity check on this, the goal is to save the inputs being damaged from overvoltage / backfeed
- What I have a is 24V 4-20ma Current loop sensor.
- A 250ohm resistor to bring that 24 volts to something safe for the Arduino 1-5 volts.
- I’ve added a N-channel mosfet. To break the connection to the analogue input, saving the pin should sensor be powered up while the Arduino is off - Backfeed protection
- A zener 5.1v is to help regulate the voltage to ~5V
Am i heading in the right direction?