Hallo!

Ich habe die Beschreibung vom ogni42 im Code (hoffentlich richtig) skizziert.

MfG
Code:
                                             VCC
                                              +
                                              |
              +------+----+------+------------+
              |      |    |      |           _|_   |
              |      |    |     --- C3      |   )| o
              |      |    |     --- 100n  D -   )|  \
              |      |    |      |          ^   )|   \
             .-.    .-.   |     ===         |_ _)| o  \
           R1| |  R2| |   |     GND    R4     |    |
           1M| |  1k| |   |   .-----.  ___  |/
        T    '-'    '-'   +---|J   Q|-|___|-| T
       ---    |  ||  |    |   |__   |  4k7  |>
     +-o o----+--||--+--------oCK   |         |
     |           ||       |   |  _ _|        ===
    ===                   +---|K R Qo-       GND
    GND         C1 1n         '--o--'
                        VCC      |
                         +  R3   |
                         |  ___  |
                         +-|___|-+
                            10k  |
                                --- C2
                                --- 100n
                                 |
                                ===
                                GND