Tuesday, 13 June 2017

pic - How to protect microcontroller board 1-wire from accidental +12V connection?


I'm working on modular LED strip driver with one "Master" board and up to 32 "Slave" boards. Each "Slave" board drives one LED strip.



All boards have 3 pin terminals: - +12V (connected to 50W source) - 1-wire bus - GND


Everything will be connected in parallel (+12, 1-wire, GND).


I'm using WAGO connectors. I'm afraid, that someone will accidentally connect +12V wire to 1-wire terminal and everything connected to bus will be destroyed.


How can I protect microcontrollers from +12V on 1-wire bus?


Im using PIC16F in "Master" board and PIC10F in "Slave" boards.




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