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Need help to build a ChooChoo bike whistle (lemmy.world)
submitted 5 months ago by Burn1ngBull3t@lemmy.world to c/askelectronics@discuss.tchncs.de
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Hello !

I recently 3dprinted a train whistle that usually works with a mouthpiece. It works by simply blowing air in it.

However, I would like to convert it to a whistle for my bike. For that I would need a system that could blow air in it, instead of myself, with the press of a button.

Any idea on what i could start with to build that ? It would be best if the circuitry was quite compact too.

Thanks !

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[–] m0darn@lemmy.ca 1 points 2 months ago

I work in industrial automation and have a background in pneumatics. I think you'll be surprised at how inefficient pressurizing/moving air is. I think the most practical solution (if you can call it that) is likely carrying an air reservoir that can be pumped up with a bike pump, and having a valve to trigger the whistle. There isn't really a safe way to carry compressed air on a bicycle because it's inherently dangerous to transport. There are lots of ways to make an unsafe air reservoir for example what Chris Notap on you tube does.