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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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[–] litchralee@sh.itjust.works 5 points 5 months ago

My first thought for a compact, air-blower would be the inflater for air mattresses. They're already fairly small, have a high flow rate, and exist in forms which accept 12 VDC.

Another option is a small tank of compressed air, but that option is either heavy (steel tank) or stores air at inefficient, low pressures (plastic tank).

I suppose a third option is to rig a can of air-duster so that it blows through the whistle. That would be mechanically simple to implement a solenoid to press the valve, although there is a small environmental cost to using cans of air-duster regularly.