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Alex123

Mar 13, 2016
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I've been disassembling a circuit to see how it works and have come across a part
that no-one in my uni is 100% sure about
12092321_952045728212080_612302935_n.jpg

Would be great if someone can identify it for me
Thanks:)
 

davenn

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either a printed resistor or inductor

what did it come out of?
where in the device did it come from
make model and more photos
 

Alex123

Mar 13, 2016
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received_952058091544177.jpg

It comes from an ignition circuit/spark generator. Has no model number on that part. But it would most likely be a inductor in that case since it's in the secondary side of the transformer where there will be no reason for a resistor to be there
Sorry if I'm being very vague. It's hard to explain :S
 

davenn

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Sorry if I'm being very vague. It's hard to explain :S

no probs
The pic didn't really help unfortunately
have you used a multimeter in Ohms range and see if you can measure a resistance of the part ?


Dave
 

Alex123

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Just checked and the multi-meter is not able to measure any resistance in the part o_O
 

davenn

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Just checked and the multi-meter is not able to measure any resistance in the part o_O

OK so it may be open circuit

any chance of a better pic of it ... it's small and far away in that first pic you posted
is there any text on it on either side ?


Dave
 

ChosunOne

Jun 20, 2010
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Some transformers have fuses on the secondary side. That would explain the zero-resistance.
 

Alex123

Mar 13, 2016
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10682668_952225314860788_1576572996_o.jpg

12380643_952225328194120_1124624449_o.jpg

12516917_952225318194121_1442154031_o.jpg

My camera is struggling to focus. These are the best I can get them close up.
There is no letters or numbers on it which seems a bit strange o_O
 

davenn

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Just checked and the multi-meter is not able to measure any resistance in the part o_O

thinking this should be clarified ...
did the meter real OL or 0.0 or something else ?

My camera is struggling to focus. These are the best I can get them close up.
There is no letters or numbers on it which seems a bit strange o_O

That's ok :)
still looks like a carbon track resistive element on a ceramic substrate rather than an inductor

What its purpose is, without seeing a diagram is almost impossible to tell ?
have you tried to google for a circuit diagram or anything else ?


Dave
 

Alex123

Mar 13, 2016
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The multi meter showed 0.0 as if it's an open circuit.

Suppose it was a resistive element. Would it be used to limit the current on the secondary?

My task is to reverse engineer it for part of my project :eek: from what I can see, the primary side has a self oscillating MOSFET to control the switching. Secondary side has a few capacitors and diodes that look like they are arranged as a voltage multiplier and with that ceramic part connected in parallel to few of the capacitors.

I'm guessing this circuit follows a few concepts of what I'm looking at
images.png

And the product I have is something like this
http://m.ebay.com/itm/DC-6V-12V-to-...gh-voltage-Generator-/141812580611?nav=SEARCH
 

davenn

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Sorry mate

thread closed
we do not discuss the building of weapons
please reread the forums rules that you agreed to when you joined the forum

cheers
Dave
 
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