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  1. J

    switchable 12V pull-up resistor

    I'm using Teensy 3.1 in an automotive interface that includes a connection to the OBD2 k-line. That specification requires a terminating 510 Ohm pull-up resistor from the k-line to +12V. If there is an external device connected to the bus, it will have a terminating resistor; when there is no...
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