Author Topic: carbon jumper  (Read 724 times)

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Offline Lucky-LukaTopic starter

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carbon jumper
« on: June 30, 2019, 10:16:15 pm »
Hi all
I was watching an EEVBLOG2 video.
carbon jumpers were mentioned.
Since I've never heard of them, what are they, what are their function and can an hobbyst use them?
Cheers
Memento audere semper.
 

Offline rs20

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Re: carbon jumper
« Reply #1 on: June 30, 2019, 10:48:43 pm »
They're just like normal jumper wires, and serve the same purpose. It's just that they can save a few cents by splodging carbon on the board rather than using real wire, especially if some other part of the board has carbon on it (e.g. for touch button contacts).

The carbon jumpers have a much higher resistance than real wire, which is either known by the designers to be harmless, or may even be desireable (adding a pull-up resistor between two distant nets on the board without even buying a resistor = saving half a cent).

No, this has no relevance to hobbyist electronics, because it's all about saving fractions of a cent. The carbon is doing nothing other than being a very imprecise resistor.
 
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