Mark Rober decided his car horn always sounded a little on the aggressive side, so, using a variety of parts bought on Amazon, he set about building the politest horn you'll ever hear.
The post Ex-NASA engineer creates the friendliest car horn you’ll ever hear appeared first on Digital Trends.
from
https://www.digitaltrends.com/cars/polite-car-horn/
from
http://ifeeltechinc.blogspot.com/2017/06/ex-nasa-engineer-creates-friendliest.html
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