Author Topic: What are these components? and how to read their values?  (Read 1775 times)

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Offline AzharTopic starter

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What are these components? and how to read their values?
« on: December 11, 2013, 04:35:36 am »
What are these components? they look like a transistor with two of its legs been shorted!
and how to read their values? it seems like they have colour coding of some sort!
 

Offline bxs

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Re: What are these components? and how to read their values?
« Reply #1 on: December 11, 2013, 05:07:46 am »
My first bet would be some kind of diode.

You should give more info, from where did you got those, do you have pictures, etc...
 

Offline minime72706

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Re: What are these components? and how to read their values?
« Reply #2 on: December 11, 2013, 05:34:43 am »
I've seen pretty standard transistor values with color bands on them that I did not understand. One thing that the strange connection of the 2nd and 3rd pins implies is that it's maybe a "current regulator diode", specifically a ghetto-rigged one. :P   Pretend the pins 1 through 3 are source, gate and drain of a MOSFET or JFET. Connecting the gate and drain of a FET makes a diode-connected device which will attempt to keep a constant drain current. You could try testing it, but I would be careful if you don't want to damage them.

EDIT: Upon a quick closer inspection it appears that the middle lead was cut manually and the 2nd and 3rd pin bridged with solder. Can you confirm this? It kind of supports my ghetto-rigged current-regulator idea.
I have more incomplete projects than I have digits and toes.
 

Offline Simon123

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Re: What are these components? and how to read their values?
« Reply #3 on: December 11, 2013, 01:52:12 pm »
Those are varicap diodes.
 


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