Strange parts

spicydeath82

New Member

• Jul 27, 2010

• #1

hi, i've been encountering these strange parts in certain electronics. they look like a diode but have to resistance in either direction at all, and have no marking on them at all. they kinda look like a ferrite bead epoxied onto a jumper. is this some sorta way to have jumpers that eliminate a bit of electrical interference or something? just curious.

 

crutschow

Well-Known Member

Most Helpful Member

• Jul 27, 2010

• #2

Do you have a picture?

Does sound rather like a ferrite bead over a jumper. It's just an easy way to wire a ferrite bead into a PCB circuit wherever you want some high frequency filtering. They are typically used to filter EMI, and to prevent high frequency oscillations in certain types of amplifier circuits.

 

spicydeath82

New Member

• Jul 27, 2010

• #3

sure here's a pic. the top ones i was sure were ferrite chokes i believe, but it was the bottom ones i'm iffy on.

 

crutschow

Well-Known Member

Most Helpful Member

• Jul 27, 2010

• #4

Yes, the top ones are chokes wound on (likely) ferrite toroid cores. The smaller ones are ferrite beads.

 

spicydeath82

New Member

• Jul 27, 2010

• #5

koo. i thought so but wasn't sure. might be useful if i were to make a game controller using the game port since from what i understand the electrical interference can mess with the signals the computer receives, IE phantom button presses and the like. i had a cheap controller that did that, when i tore it apart there was no ferrite chokes or beads any where. i'm sure it would have benefited from some... lol.

 

Boncuk

New Member

• Jul 28, 2010

• #6

crutschow said:

Yes, the top ones are chokes wound on (likely) ferrite toroid cores. The smaller ones are ferrite beads.

Click to expand...

I guess the smaller ones are plastic beads for zero Ohm resistors instead of wire jumps.

Boncuk

 

spicydeath82

New Member

• Jul 28, 2010

• #7

not plastic, trust me looks and tastes like ferrite.... joking on the taste thing. feels like ferrite as well.

 

RCinFLA

Well-Known Member

• Jul 28, 2010

• #8

Bottom items are just a piece of wire put through a ferrite bead. For EMI filter.