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Component identification

abuhafss

Aug 3, 2010
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Hi

Can anybody tell what are these components?

1. The first one looks like an IC. If I am not wrong it is some custom-designed IC.

2. The second is a circuit of 6-tone (25W) automotive horn, showing a tiny oval shaped metallic component. The schematic is also shown.
 

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jpanhalt

Nov 12, 2013
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The left photo looks like a resistor array of 100K (i.e., 104) resistors. Have no idea for the right.

John
 

davenn

Moderator
Sep 5, 2009
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agree with John

the pic on the right is just too blurry to make out the item between the transistors

Dave
 

tollinjose

Feb 20, 2014
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Picture is not clear but i think oval shaped metal part has no use other than to connect two leads of the transistor.
 

abuhafss

Aug 3, 2010
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Picture is not clear but i think oval shaped metal part has no use other than to connect two leads of the transistor.

I'll try to get you more clear photo.

Why would a specially designed metallic part be used just to connect two leads, why not the PCB trace?

As I already mentioned, it is a circuit of 6-tone (in facts 6 musical) horn which are played in sequence with fairly loud output. If the metallic part is just to connect two leads, how six different musical tones are generated. What I assume, is that it might be some kind of Circuit on Board (COB).

Has anybody seen such COB?
 

tryppyr

Oct 22, 2013
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Oct 22, 2013
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Oh, I see now... the white thing, not the transistors.
 

shumifan50

Jan 16, 2014
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Reverse engineering circuits with anonymous blobs rarely succeeds.
The blob could be a discreet circuit, but more likely is a micro controller, so even if you knew what it was, you would still require the firmware to make the circuit behave the same way. So my opinion is tht it is a futile endeavour.
I would rather look for a circuit that does what you want to do on the web or build one from scratch using a micro controller.
 

abuhafss

Aug 3, 2010
348
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Reverse engineering circuits with anonymous blobs rarely succeeds.
The blob could be a discreet circuit, but more likely is a micro controller.

Just for knowledge sake, if it is a micro controller, would it have only two leads?
 

Divedeep

Feb 2, 2014
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Feb 2, 2014
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It is unlikely for a microcontroller to only have 2 leads. Power alone would use 2 leads.

In order to give any better information a clearer image is needed of the part in question.
 
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