12v Pulse In to Buzzer Out w/reset

Hi, I'm working on a functional project that i would really appreciate some assistance with.

Complete Novice.

Input is a 12v pulse.
I recognize this needs to be lowered to meet arduino input voltage limitations.

What I want it to do is when it sees the input signal it sends a continuous output signal to either a voltage stepper or relay to a loud alarm buzzer with a reset switch.

I have a 5vdc piezo buzzer to play with until I get the relay.

Only gone so far as to initiate a simple blinking program to alternate the buzzer on and off as a start.

I don't know how to set up the input signal to trigger the program or set up the reset switch yet.

If you want code written for you, you need to post in "Gigs and Collaborations" and bring your wallet.

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Good Luck!

You can have the 12V pulse drive a transistor as a buffer

I apologize if i ran afoul of posting protocol, theres a lot of sections.

I'll do some research on crossroads schematic, thank you for that and repost in the proper places.

I don't mind hiring someone if need be, making this work has real world implications for me, not just a hobby project.

Thanks for the help!

You can have Arduino drive a transistor in the same way to sink 12V current thru a relay coil.