Hello All,

I recently purchased a grab bag of coils and inductors. I was a little dissapointed when they were not labeled to know what their values are.

My question, how would I go about knowing what their values are. My Multimeter meter does not have Inductance. Is their other ways to accomplish the task?

Thanks so much in advance for the help.

 

Here's an idea for measuring inductors without buying a meter, but it requires a signal generator and an oscilloscope, and math!

http://forum.allaboutcircuits.com/blog.php?b=478

 

Here's an idea for measuring inductors without buying a meter, but it requires a signal generator and an oscilloscope, and math!

http://forum.allaboutcircuits.com/blog.php?b=478

Hi thanks for the link, but I dont have the scope or generator

 

If you can't generate a frequency besides the power line frequency, and you don't have a way to look at the results, you're pretty much stuck. Let's see if anybody else has an idea for you.

 

If you can't generate a frequency besides the power line frequency, and you don't have a way to look at the results, you're pretty much stuck. Let's see if anybody else has an idea for you.

Would it be possible for me to send a pic and look at the color codes and maybe that would help?

 

Post the photos on this site.

 

Post the photos on this site.

here is the photo of the inductors

 

Good picture. I bet somebody can read that, but most are asleep right now.

 

here is the photo of the inductors

They look more like resistors, than inductors. I'm not familiar with the color codes, so I can't read them.

 

10µH ±10% according to:
http://www.elexp.com/t_induct.htm

 

I concur. Assuming they ARE inductors (and it looks like there is bobbin form under the conformal coating), then the base unit is µH. Other than that the color code works the same as for a resistor, including the tolerance. Or at least that is my understanding.

 

Inductors cloors codes have been standardized, the color marks or brands represent the inductor's value and tolerance, following is a table that translates the colours and numbers.
color significant figures or decimal point multiplier inductance tolerance
Brown 1 10 +/-1%
Red 2 100 +/-2%
Orange 3 1000 +/-3%
Yellow 4 10,000 +/-4%
Green 5
Blue 6
Violet 7
Gray 8
White 9
Black 0 1 +/-20%
Silver 0.01 +/-10%
Gold 0.1

 

colour significant figures or decimal point multiplier inductance tolerance
Brown 1 10 +/-1%
Red 2 100 +/-2%
Orange 3 1000 +/-3%
Yellow 4 10000 +/-4%
Green 5
Blue 6
Violet 7
Gray 8
white 9
Black 0 1 +/20%
Silver 0.01 +/-10%
Gold 0.1 +/-5%

 

I read brown-black-black-silver. Same as odinhg

 

Would it also help if I send a pic of mine? :/

An approximate value will do...