Hi all my friends, I hope all is doing well.
I have some components I could not find., I tested them as capacitors or as a diode, it did not work with me. anyone kindly know it?
and how to test it.
thanks in advance

 

Welcome to AAC.

That is a diode, probably a zener diode. If that's the case, while (if it is working) it will act like a normal diode when forward biased, it has a very specific breakdown voltage when reverse biased. This property (called the knee voltage for zeners) makes the zener very useful.

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By connecting a positive supply rail to the 0V rail through a zener, a circuit can be protected from over voltage by shunting anything over the knee voltage to the 0V rail. They are sometimes pushed into service as terrible voltage regulators. In most cases this is a poor design, and a proper regulator should be used instead.

 

Your arrow on the right points to what looks like a crystal, and the bottom left arrow is a diode possibly a schottky diode and above that is an inductor.

 

Welcome to AAC.

That is a diode, probably a zener diode. If that's the case, while (if it is working) it will act like a normal diode when forward biased, it has a very specific breakdown voltage when reverse biased. This property (called the knee voltage for zeners) makes the zener very useful.

View attachment 304074​

By connecting a positive supply rail to the 0V rail through a zener, a circuit can be protected from over voltage by shunting anything over the knee voltage to the 0V rail. They are sometimes pushed into service as terrible voltage regulators. In most cases this is a poor design, and a proper regulator should be used instead.

thanks for your reply, and do you know the other components? thanks in advance

 

thanks for your reply, and do you know the other components? thanks in advance

Inductor




Inductor



Diode, probably about 1A (may be a zener)

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there is gowanda SMT inductor https://www.gowanda.com/product-fin...ucts/datasheet/SMP5025-Datasheet_RevIssue.pdf

two smt diodes, small one is likely a zener diode. the second one could be a zener too but is possibly a shotky diode

and there is a crystal (clock for Atmel chip, see side capacitors).

 

Your arrow on the right points to what looks like a crystal, and the bottom left arrow is a diode possibly a schottky diode and above that is an inductor.

Thanks so much, really thanks

 

there is gowanda SMT inductor https://www.gowanda.com/product-fin...ucts/datasheet/SMP5025-Datasheet_RevIssue.pdf

two smt diodes, small one is likely a zener diode. the second one could be a zener too but is possibly a shotky diode

and there is a crystal (clock for Atmel chip, see side capacitors).

Your arrow on the right points to what looks like a crystal, and the bottom left arrow is a diode possibly a schottky diode and above that is an inductor.

Really thank you. I appreciate your help.

 

there is gowanda SMT inductor https://www.gowanda.com/product-fin...ucts/datasheet/SMP5025-Datasheet_RevIssue.pdf

two smt diodes, small one is likely a zener diode. the second one could be a zener too but is possibly a shotky diode

and there is a crystal (clock for Atmel chip, see side capacitors).
View attachment 304084

Thanks and my kind regards