Transistor works, in this picture, please don't understand

CodePudding user response:

Triode, powered by light lotus root, lotus root, driven by a RELAY2 common circuit.

CodePudding user response:

This picture has a problem, you connect to your 9012

CodePudding user response:

Just don't understand how the triode works, transistor's base in a suspended state, and how he is conducting?

CodePudding user response:

Cross the light lotus root

CodePudding user response:

The figure you have any question, how did that work, think about it, on the left there is no draw circuit

CodePudding user response:

But he did this circuit can work, this is already through practical test

CodePudding user response:

Base is not simple impending, our common transistor is controlled by base current transistor between other poles by the current, base current through an external circuit is added, the light activated triode is also controlled by the base area to control between the emitter and the collector current, but not through additional circuit, but by light intensity to control on the degree of block electronic, light intensity, the greater the obstacle, the more small, the effect of which is similar to ordinary diodes, how specific controlled by light, please turn to https://wenku.baidu.com/view/75a7a6300b4c2e3f572763bb.html

CodePudding user response:

On the left side of the circuit, conduction

CodePudding user response:

Input circuit is wrong

CodePudding user response:

Is, of course, photoelectric coupling conduction while you work, very good circuit, province components

CodePudding user response:

Seems to be draw against the D12, of course

CodePudding user response:

Advice, the base on a 1 k resistor, and guarantee the light coupling is closed, PNP transistors in the closed state,