Voltage climb.

[davelectronic]

Thank you, i will try and find out more about this type of circuit. My maths is not the greatest to be honest. I'm ok with ohms law and a bit beyond that. But sure i will research this as much as i can. Its all new, and i've got a lot to learn, although i understand most theory in say tutorials etc, i lack the real time practical skills as i've yet to do a lot of these circuits, and test and trouble shoot etc. Thanks again for all your help !

[MK14]

Thank you, i will try and find out more about this type of circuit. My maths is not the greatest to be honest. I'm ok with ohms law and a bit beyond that. But sure i will research this as much as i can. Its all new, and i've got a lot to learn, although i understand most theory in say tutorials etc, i lack the real time practical skills as i've yet to do a lot of these circuits, and test and trouble shoot etc. Thanks again for all your help !

Or an even simpler solution. A 30 Amp fuse (or whatever value you need).

Bench/adjustable general use power supplies, benefit from the convenience of automatic built in current limits.

But one-off, dedicated power supplies, are probably reasonably ok with just simple fuse(s).

Or go for BOTH, and if your current limit circuitry fails, the fuse (at a slightly higher current), will pop, and save the day.

Also, foldback current limiting (see previous post), can cause problems, with it inappropriately refusing to start up, if too much current is needed, early on.

[davelectronic]

I will have to look up foldback current limiting. I've used a zener diode and fuse up until know for over voltage protection, and a final current limit fuse. So fuse and zener on the regulators output, and final fuse after the high current output. But i have looked in to crowbar circuits, and will have a go at building one into a final purposed built circuit.