Protection for Arduino (overvoltage)

hi
i receiving bipolar signal arduino. done through lm741 (op-amp) , seems working nice. question how go limiting signal - mean if op-amp destroyed or if else happens circuit, how can secure arduino not receive else 0-5v? signal change , important dont loose resolution.

i thought doing this:



the diode protect against negative voltage , zenerdiode ensure arduino wont more 5v........ fly?

thanks

actually,if using uno r3, comes voltage regulator.
otherwise no go lm317,instead opt lm7805,whose input should 9v transistor radio battery , comes 5v regulated output.in case arduino safe if regulator blow,but blowing off less frequent issue,just relax , have fun.

Arduino Forum > Using Arduino > Sensors > Protection for Arduino (overvoltage)

arduino