Hallo!

Code:
                  VCC
                   +
                   |
           +---+---+---+---+
           |   |       |   |
        ||-+   |       |   +-||-
     T1 ||->   - D1 D2 -   <-|| T2
       -||-+   ^   _   ^   +-||
           |   |  / \  |   |
           +---+-( M )-+---+
           |   |  \_/  |   |
        ||-+   -       -   +-||-
     T3 ||<-   ^ D3 D4 ^   ->|| T4
       -||-+   |       |   +-||
           |   |       |   |
           +---+---+---+---+
                   |
                  ===
                  GND

(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)