Electronics > Beginners

Hooking up 4 x 3v LED string lights to a 6v PSU

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Brumby:
To be fair - so that you don't get too complacent with your knowledge of fuses - there is a whole industry that is built around fuses.  It does become quite involved, especially when you get into high current and high energy circuits (yes, they are different things).  Do a Google search on "types of fuse" or something like that when you have a couple of days to get totally lost.  I would also suggest you check out the challenges breaking DC circuits (particularly high voltage) as against AC ones.

Fortunately, for the vast majority of situations you will find yourself in as a hobbyist, this is one example of a table that covers the basics:


It is possible you could encounter ceramic and HRC fuses (in a multimeter, for example), so being aware of those is useful.

Just one more word of caution ... if you come across any fuse that is thicker than your average cheapie ball-point pen, don't mess around with it unless you are absolutely certain of what you are dealing with.  I'm not just talking about the equipment being protected, but also, the capability of the power source, for example: how far a spark could jump and how big a spanner bus bar* it could vaporise.

* Edit: Change automotive reference to a power systems one.

bob21:
Understood. Thank you for the additional information. I have some fuses on order. I've never seen a fuse larger than a standard UK plug, I wouldn't be comfortable playing with anything that large anyway. Sounds to me like high voltage AC stuff, which isn't my cup of tea. :) I will keep that image for reference though.

Thanks guys :)

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