Automotive circuit protection ?

[ItsMike]

Hey everyone,

I bet this was asked many many many times but I can't seem to find an answer with the search.

I'm looking to power and interface some electronic circuits to the car electrical system, I don't know too much about cars my self but I know that the electrical system tents to be very noisy.

So what kind of protection is necessary ? And what does it protect against ?
I've read somewhere that the alternator causes noise with very high amplitude, both positive and negative.
Is there anything else ?
Reverse battery polarity ?
And short circuit conditions ?

How do I protect against these ?
Just fuse+series diode (polarity) and some clamping TVS ? Anything else ? Is there any working tested circuit ?

Thanks in advance, Mike.

 

[bountyhunter]

Typically we used devices like Tranzorbs to protect against auto voltage transients. If you want to learn about such things, look up "load dump protection".

 

[3v0]

They now make a wide variety of regulator intended for use in cars. They have all the extra stuff needed for cars built in and they are inexpensive.

 

[Mosaic]

See this link:

https://www.electro-tech-online.com/threads/plx-automotive-sensor-lcd-gauge.124837/#post1033715