I made an AGU fuse out of a brass cotter pin I had laying around.

Why bother, do it empirically

-Calculate the cross sectional area
Search: brass temperature vs current
Search: melting temp of brass

I found charts talking about the coefficient of temperature? I never took maths in thermodynamics, not sure how to use numbers like "1.5x10^-3" (the temp coefficient of brass apparently) to get an amperage that will melt it...

>1.5x10^-3
Scientific notation
"1.5 times 10 to the 3rd power"
basically just move the decimal 3 places to the right.
1.5x10^-3 = 1,500
>thermodynamics
Yea, I don't know either

>>1036046
you're in over your head. buy a fuse, they are cheap.

>>1036069
You got it backwards
1,500 is 1.5x10^3

1.5x10^-3 is 0.0015

>>1036666
I decided just to measure what it would blow at on a short circuit with a clamp-on amp meter. Busted at about 39 amps
>also, checked

File: attachment.jpg (34KB, 640x537px) Image search: [Google]

34KB, 640x537px

>>1036993
Well, If I even need a 39 amp fuse I know where to get one now.

>>1037201
Ahahaha Nice one. I saw this on ye olde maintainer humor facebook page one ime

>>1036046
You need to know what variation in size, shape, material (even if its not an alloy it will have a purity that affects conductivity) as well as even things like surface finish and account for things like greasy finger prints that fuck up the performance.
Also instead of using brain dead retard words like ' amperage' and e.g. 'ampacity' you can use normal people words like current.

>>1037370
>brain dead retard words like 'amperage'

Nigga what?
Go project somewhere else.