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[Help] bicycle proximity sensor Answered

hello guys i would like to start making a proximity sensor the idea is to mount it on the back of my bicycle when an object/vehicle come close it gives me reading with distance and maybe a beep or something like that,the question is i found there are 2 methods one using IR and one using ultrasonic,which one is cheaper and which one is better and easier.this is supposed to my first instructable involves programming.

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Downunder35m

3 years ago

Go with ultrasonic.
There are Arduino sketches already made for certain and cheap sensors, so it should be no problem finding something more or less "ready to go".
If you use something like an Arduino mini you should have no problems hiding all including batteries under the seat.

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Downunder35mMido Masry

Reply 3 years ago

Depends only on the type of sensor you use but 3-5m is realistical.
The further you go the wider the "beam" so to say and you can pick up on unwanted things like the traffic in the other lane.
A more accurate solution with long range would be a laser distance sensor but they can be quite costly.
IT can work but usually with less than 2m during daylight.

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Mido MasryDownunder35m

Reply 3 years ago

sorry for annoying you again but do you know any good models for that cover 15-10 meters i know its a bit big but if we consider the reaction time and the possible high speed of the car 5 meters may not be enough...

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Downunder35mMido Masry

Reply 3 years ago

I would not know a suitable model, comes back to checking datasheets I am afraid.
Sorry.