114Views9Replies

Author Options:

What are these components I harvested from old boards? Answered

If you know what any of the components in the pictures are please leave a comment with the number of the picture in which the component you are referring to is in.

Thanks

Discussions

0
None
steveastrouk

Best Answer 6 years ago

The coils are "chokes" or inductors, the square package with two wires usually has three ? and the white thing is a CdS cell, a photoresistor.

0
None
quatchsteveastrouk

Answer 6 years ago

google whatever letters and numbers are on the black package, that should get you the datasheet, which will tell you what it is. All we are likely to be able to say is that it is a generic package.

It looks too thin to be a regular transistor package?

0
None
steveastroukquatch

Answer 6 years ago

Looks like an "E-line" package - the ZTX series transistors used them

0
None
DoctorDv

6 years ago

Picture 1: maybe inductors
Picture 2: coils
Picture 3: ?
Picture 4: ?
Picture 5: Photoresistor
Picture 6: Photoresistor

0
None
mdog93

6 years ago

I don't think it is a transistor- but it could be a type i haven't come across- i'll try and read the letters although the print is minuscule!

Are the choke the coils in the ffirst or second picture or are they both types of chokes?

0
None
bwrussellmdog93

Answer 6 years ago

Both are inductors. The term choke typically means an inductor used in a primarily DC circuit. The first picture includes ferrite or ferromagnetic cores which enhance inductance.

0
None
mdog93bwrussell

Answer 6 years ago

Ok cheers. Any idea when i might use these? :p and if i could use then is Teresa away of determining the values?

0
None
bwrussellmdog93

Answer 6 years ago

chokes are used as filters. They block high frequencies while passing low frequencies. Most often these are found in radio circuits. There are two main types of chokes, one to filter radio frequencies and one to filter audio frequencies.

As with any inductor you can use it to generate a magnetic field or use a moving magnetic field to generate a current. Inductors form the basis of transformers and research into inductive power transfer, a way to transmit power without wires.

Search "measuring inductance" for lots of methods and examples on how to determine the specs of your coils.

0
None
bwrussell

6 years ago

The last two are a photoresistor. The amount of light it is exposed to changes it's resistance value. Used to turn on lights when it gets dark, etc.