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Smaller CAN transceiver:
SN65HVD23x 3.3V 8 pin SOIC
http://www.ti.com/lit/ds/symlink/sn65hvd230.pdf
==> See layout guidelines
TJA1049 8 SOIC with 5V supply and 3.3V IO:
http://www.nxp.com/documents/data_sheet/TJA1049.pdf
Supply: LM2940-N IC REG LDO 5V 1A SOT223
==============> THIS HAS REVERSE BATTERY PROTECTION ELIMINATING 1 COMPONENT!!!!!!
Input cap: CAP CER 0.47UF 50V X7R 0805 C0805C474K5RACTU
Reverse protection diode:
SparkFun uses MBRA140 (1A, 0.56V drop, 40V reverse)
OpenXC uses RS1J (1A, 1.56V drop, 600V reverse)
==> Use MBRA140
0.016 width for power supply trace
Make VCC plane around regulator (both sides if possible) and use a bunch
of vias under the case to transfer heat.
MicroSD card => Just connecto to SPI (no external interfacing needed)
Amphenol http://www.digikey.com/product-detail/en/114-00841-68/114-00841-68-1-ND/2187101
Molex http://www.digikey.com/product-detail/en/1040310811/WM6357CT-ND/2804769
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