Don't forget that you don't want to disturb the car electronics so that you crash your car and run someone over or hurt yourself - that's one reason why car electronics is tested against standards.
There are a lot of good materials to be found on the Internet that chip manufacturers like Bosch, NXP, TI and other companies have uploaded for free to read for anyone interested in their products, there you can learn a lot about how to properly protect measurement inputs like on A/D-converter inputs and also how to properly design your circuit so that it doesn't disturb the rest of the car electronics. Properly protecting an A/D-input is not just to protect it so that you don't damage it but also (or should I say mostly) so that the input doesn't disturb the rest of the die (chip) so that you get correct measurements and also so that the chip works as designed - most A/D-inputs can only tolerate a few hundred milli-volts above and below the supply voltage and ground signal (usually some +/-0.3V) before the chip is affected. Google for instance "A/D-input protection" or "A/D injection current" and you'll find a lot of articles and application notes on the subject. /Martin -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/f5b4ac8b-6178-41a0-ac3f-068727f532a2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
