This is a Simplex 2903-9001 light plate, with a 2901-9833 horn, made entirely from scratch (no pun intended). It took me a few hours non-stop to make this. I believe this is (so far) the most realistic fire alarm on scratch. It works, too! 1 key: March Time 2 key: Code 3 3 key: Continuous 4 key: Chirp 0 key: Off Request more tones in the comments!
Please do not use without permission. Thank you!