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macGRID-SRN / hitchBOT

hitchBOT - Canada's hitch-hiking robot
http://hitchbot.me
GNU General Public License v2.0
22 stars 8 forks source link

filter noise on 12v rail in car #52

Closed gagichce closed 9 years ago

gagichce commented 9 years ago

There was a lot of noise on the 12v rail in a car, which the servo thinks is instructions. This noise is only present in some cars (ie my 2004 van and likely from the radio)

We will need to do more testing to find the frequency(ies) which cause this, and then design a system to filter out this noise.

gagichce commented 9 years ago

There isn't just noise on the 12v rail, but also voltage spikes and drops. There is a max of 30V spike possible! We may want to look into regulating this to 12V

gagichce commented 9 years ago

I have just purchased 2 different noise filters for car power/car audio. We will see if using these reduces the noise. (Spoiler Alert! .. It should)

gagichce commented 9 years ago

annnnnnd it does! tested in car.. No noise on the servo!