Originally Posted by
Buffalo Buff
I let it go, I just like to tell drivers when they ****ed up. Same reason I honk at people that pull out in front of me when I drive. Every wreck I've been in or have almost been in was because of people doing that, so I always watch out for it.
At night I strobe my headlight at max directly into their rearview mirror if they come close to hitting me because they passed too close. I figured a horn would be a good daytime option.
Heh, the number of times I've muttered "Ode for a horn".
Recently I built my own. Used some refurbished horn speakers from a railway crossing (refurbished with a 2W speaker), a TDA 1905 amplifier and I used a Freetronics LeoStick (Arduino Leonardo clone) to produce the horn noise from a recording. The recording is a synthesized train air horn, or there's a bell sound that I can use (toggle switch selection).
I can also plug a microphone into it for PA use or plug my (amateur) radio into it to use it as an external extension speaker. For 2W it's surprisingly loud. Downside is it's a little more bulky and it needs a 9V supply to operate (not a problem for me as I have a 12V system) but it seems to be doing the trick. Only needed it once so far.