RC snubber.

[Jan Waclawek]

>> 47 R v sérii s G je v pohodě, ale jaký R je z toho optočlenu na GND?
> Myslim ze 4k7, ale nemam to u sebe.

Aha teda takto?



                    +12V ISOL
                    o
            +5V     |       o +24V ISOL
             o      |       |
             |    |/        o---------------------------.
             V -> |         |                           |
             -    |>        - UF4007                    C|
        ___  |      |       ^                           C| 0.5A
        ___  |     .-.      |                           C|
            .-.    | |47R   o-------------'             |
            | |    | |      |             |             |
            | |    '-'   ||-+             '-------------'
            '-'     |    ||<- IRL540
    mcu      |      o----||-+
    PIN o----'      |       |
  300Hz            .-.      |
     |             | |     ===
     |             | |     GND ISOL
    ===            '-' 47k
    GND             |
                   ===
                   GND
(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)


wek