component identification

[370forlife]

Re: component identification

the square one looks like a big piece of gum a chicklet.

Agreed, its gum.

[shovenose]

Re: component identification

it came out of a psu

[momaka]

Re: component identification

Agreed, its gum.

Yes, unfortunately some factories still allow their workers to chew gum while working.

@ shovenose: open up a bunch of PSUs and find a component that looks just like that. Then see its markings on the PCB.
If it's makred with "R"-something, it's a resistor. Similarly, C is capacitor, L is inductor, D is diode, Q is transistor. There's more, but these are the basic ones you need to know for right now.
Once you know what it is, do a general Google (or Wiki) search on this type of component and see different examples of it. (hint: the numbers on the component you showed are not identification numbers but rather its ratings).

As for testing the rest of the components, I'm not sure if you can use your analog meter for that. Well you can measure resistance on a resistor and see if its resistance is within tolerance to the one indicated by the color bands (google resistor color bands if you need help).

If you have a digital meter, though, you can measure resistance or check continuity on pretty much everything as a general test. Diodes and resistors are the easiest to check.
A diode will show a reading one way but not the other. With the black probe on anode and the red probe on cathode, you should get no reading/open circuit (google/wiki "diode" to see which side is cathode and which is anode). If you do, and it's fairly low ohms, it's bad.

[shovenose]

Re: component identification

Yes, unfortunately some factories still allow their workers to chew gum while working.

@ shovenose: open up a bunch of PSUs and find a component that looks just like that. Then see its markings on the PCB.
If it's makred with "R"-something, it's a resistor. Similarly, C is capacitor, L is inductor, D is diode, Q is transistor. There's more, but these are the basic ones you need to know for right now.
Once you know what it is, do a general Google (or Wiki) search on this type of component and see different examples of it. (hint: the numbers on the component you showed are not identification numbers but rather its ratings).

As for testing the rest of the components, I'm not sure if you can use your analog meter for that. Well you can measure resistance on a resistor and see if its resistance is within tolerance to the one indicated by the color bands (google resistor color bands if you need help).

If you have a digital meter, though, you can measure resistance or check continuity on pretty much everything as a general test. Diodes and resistors are the easiest to check.
A diode will show a reading one way but not the other. With the black probe on anode and the red probe on cathode, you should get no reading/open circuit (google/wiki "diode" to see which side is cathode and which is anode). If you do, and it's fairly low ohms, it's bad.

thank you. very helpful...*yawns* will do it all tomwrrow