Author Topic: Resistor or Capacitor Please Help!!  (Read 1469 times)

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Offline giovesjoTopic starter

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Resistor or Capacitor Please Help!!
« on: May 23, 2019, 07:35:35 pm »
Hi everyone...
I have a very good question that for the most of you will sound stupid maybe....
Is this little boy in the photo a Resistor or a Capacitor?

thanks in advance
 

Online mariush

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Re: Resistor or Capacitor Please Help!!
« Reply #1 on: May 23, 2019, 07:56:28 pm »
It could be an inductor.

If not, most likely it's a capacitor.

Why not use a multimeter to check resistance across the pads?
 

Offline giovesjoTopic starter

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Re: Resistor or Capacitor Please Help!!
« Reply #2 on: May 23, 2019, 08:08:25 pm »
I checked and it gave me 0.2 ohms but this is also the value of the Multimeter if I connect the leads togheter.
thanks for your answer!!
 

Offline helius

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Re: Resistor or Capacitor Please Help!!
« Reply #3 on: May 23, 2019, 08:10:59 pm »
In that case, it is likely an inductor (the gray color also indicates that, as inductors are made from ferrites or iron alloys).
Some resistors are made to be 0 ohms, effectively a short jumper, but SMD resistors are most often colored black.
 

Offline giovesjoTopic starter

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Re: Resistor or Capacitor Please Help!!
« Reply #4 on: May 23, 2019, 08:12:37 pm »
So you will exclude that is a resistor?
 

Online Zero999

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Re: Resistor or Capacitor Please Help!!
« Reply #5 on: May 23, 2019, 09:40:35 pm »
So you will exclude that is a resistor?

Not entirely. It could be a 0.2Ohm resistor, but it's unlikely.
 

Offline Psi

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Re: Resistor or Capacitor Please Help!!
« Reply #6 on: May 23, 2019, 10:06:29 pm »
Usually you can tell resistor apart because their height is quite a bit less than their width.
With capacitors/inductors their height is closer to their width.

The material also looks different. Capacitors 'look' a bit waxy while resistors look a bit like painted cardboard.

Inductors vs capacitors is a little more tricky, often inductors are black/dark colours but not always.
Capacitors are often a brown/beige colour.
« Last Edit: May 23, 2019, 10:10:58 pm by Psi »
Greek letter 'Psi' (not Pounds per Square Inch)
 

Online radiolistener

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Re: Resistor or Capacitor Please Help!!
« Reply #7 on: May 23, 2019, 10:51:34 pm »
Looks like ferrite bead (inductor with high loss, designed in order to filter power voltage from high frequency noise). It should be near zero Ohm at DC and about 200-600 Ohm at 100 MHz AC.

For example: https://www.murata.com/en-global/api/pdfdownloadapi?cate=&partno=BLM02BC220SN1%23
« Last Edit: May 23, 2019, 10:59:36 pm by radiolistener »
 

Offline wraper

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Re: Resistor or Capacitor Please Help!!
« Reply #8 on: May 23, 2019, 11:13:36 pm »
No chance being resistor. If color as looks on the picture is correct, should be ferrite bead or varistor. Also could be inductor but not very likely being located like this.
 
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Offline wraper

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Re: Resistor or Capacitor Please Help!!
« Reply #9 on: May 23, 2019, 11:14:40 pm »
So you will exclude that is a resistor?

Not entirely. It could be a 0.2Ohm resistor, but it's unlikely.
Only if you use ferrite beads as resistors  :).
 

Online Zero999

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Re: Resistor or Capacitor Please Help!!
« Reply #10 on: May 24, 2019, 07:32:31 am »
So you will exclude that is a resistor?

Not entirely. It could be a 0.2Ohm resistor, but it's unlikely.
Only if you use ferrite beads as resistors  :).
It could be used as a resistor, but it won't be a very good one. Yes, you're right. It's a ferrite bead of course!
 

Offline giovesjoTopic starter

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Re: Resistor or Capacitor Please Help!!
« Reply #11 on: May 24, 2019, 07:36:49 am »
thanks for your answer very clear.
 

Offline giovesjoTopic starter

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Re: Resistor or Capacitor Please Help!!
« Reply #12 on: May 24, 2019, 07:41:58 am »
I think you nailed it...thanks man!!
 

Offline Arjunan M R

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Re: Resistor or Capacitor Please Help!!
« Reply #13 on: May 25, 2019, 03:09:14 pm »
So you will exclude that is a resistor?

Not entirely. It could be a 0.2Ohm resistor, but it's unlikely.
If it is a 200mΩ resistor it will be a current shunt(not sure(thats the only purpose for 200mΩ as i know)).I dont think current shunts will be made that small(lower power rating).I think it will be an inductor.
 

Offline wraper

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Re: Resistor or Capacitor Please Help!!
« Reply #14 on: May 25, 2019, 04:22:49 pm »
So you will exclude that is a resistor?

Not entirely. It could be a 0.2Ohm resistor, but it's unlikely.
If it is a 200mΩ resistor it will be a current shunt(not sure(thats the only purpose for 200mΩ as i know)).I dont think current shunts will be made that small(lower power rating).I think it will be an inductor.
It's not a resistor/current shunt but there is no issue of small resistor being current shunt. For example 0.2 ohm 0402 resistor can pass up to 0.5A current.
 


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