I am currently developing a datalogger for car.
Here is my I/O configuration :
- * 8 DI
* 4 Hi-speed counter (fmax = 100kHz)
* 4 AI
* CAN connection
I will have 2 uc :
- * Cortex M3 : main uc
* Attiny 2313 for hi-speed counters
I want to have a good isolation (galvanic isolation?) of the I/O and of the power supply.
I intend to use optocouplers for I/O (K847 for DI and HCNR 2000 for AI) and a CAN transceiver (MAX13041).
>> This components provide enough isolation for car use?
Here is the schematic of my optocoupler. Could you check it?
I would like to use DC/DC isolated converter for generating 3.3V and 12V.
>>I need some help to choose the right DC/DC converter, unless there is a better way to handle my problem?
>>Should I take care of others problems linked to car design?
>>Have you some resource/links for automotive design?
Thanks for your comments and advice.