Dynatron switch circuit

Work several years, what dynatron uses is most, it is switch circuit actually. Introduce respectively belowPNPModel andNPNModel dynatron. Say firstPNPModel dynatron, commonly used model has9012, 8550Etc. How be used, pursue as follows:

FMIt is a buzzer, 8550It isPNPModel dynatron, CCarry ground connection, BUpright by sheet piece engine control, EEnd is passedFMReceiveVCC. According to the direction of arrowhead, EWhen carrying tall voltage, whenBEnd also is tall voltage, soEAndCDisconnect between, whenBEnd is low voltage, soEAndCGuide directly, achieve the effect of switch. Simple skill: The arrowhead on dynatron is in directional diode, want diode only guide is connected, so dynatron can guide up and down.

NPNdynatron also is same argument, here does not become overmuch explanation.

Here can see, dynatron uses as when switch is in charge of very simple, can involve computation of multiple of any so called formula, enlarge to wait a moment far from.