car batteries
Hi excuse me, I wanted to know how the circuit works.
because 2 zener is used in series, the function of the triac, the zener in the tail of the transistor ...
I know about electronics but I don't know much about circuit analysis ..
if you would do me the favor I thank you ...
Regards Carlos. To understand the operation of this circuit, it is necessary to first know the individual operations of each component.
In this circuit there is no triac. What there is is a thyristor who is the little brother of the triac.
Tell me if you know the operation of some of the components and I can instruct you on the subject.
I list the components and tell me what you know about each one:
- RECTIFIER DIODE.
-ZENER DIODE.
-TRANSISTOR.
-RISTOR.
If I know how it works, for example, a diode that works as a rectifier by letting the signal pass in one direction only, the zener who limits the tension of the work is the thyristor that is handled by a signal to be able to work as a command diode (but this component I do not know well what is the operation used) and the transistor (works as a stopcock to tell you an example (but because such a transistor and not a bc 547 for example).
I hope you help me to understand how it works, in this way I can remember circuit analysis.
The transistors have different characteristics and in the same way that you cannot use a passenger car to hook a container trailer, you cannot use a small transistor to support a large load.
The BC 547 is a transistor that has a large gain (110-800) and supports a maximum current of 100mA but is poorly suited to handle medium powers.
The BD 437 can withstand a maximum of 4A its gain is small (40-130) its larger capsule enables it to dissipate heat more easily so I have used this transistor in this application.
The two zener diodes that attract your attention have the mission of distributing the voltage or reducing the intensity so that the transistor warms up less when it enters saturation. The design of this circuit is designed to minimize component fatigue and make it very durable.
when the 13 volt zenes goes into active driving the transistor and it goes into driving causing the triristor to stop driving. That will cause the output voltage to not exceed 13.7v.
13 volts plus 0.7 of the transistor junction (barrier potential) that voltage rises with temperature.
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