Power supply overload protection circuit?

[John Egerton]

Hey guys....

I have a pedalboard with an onboard power supply and was wondering how its overload protection feature worked...

Its basically a way in which its cuts power to all the pedals and gradually lights up an 'overload' LED when you plug in a pedal with the wrong polarity connector, or use just to many pedals with it...

I ask this as I'd like to duplicate this feature for my custom PSU.

Thanks

John

[gez]

I have a pedalboard with an onboard power supply and was wondering how its overload protection feature worked...

Its basically a way in which its cuts power to all the pedals and gradually lights up an 'overload' LED when you plug in a pedal with the wrong polarity connector, or use just to many pedals with it...

I ask this as I'd like to duplicate this feature for my custom PSU.

Power Supply Projects by R A Penfold (Babani BP 76) has an 'Electronic Fuse' circuit.  Can't remember the details (other than that it's simple) but I dare say a LED indicator could be incorporated somewhere.

Even if the circuit isn't appropriate it's an excellent book to have, especially at £4.99!

Why not just trace the schematic of your onboard supply to find out?

[bigjonny]

John Egerton, if you *do* figure this out, please do share, here.  It'd be much appreciated by me (at the very least).

BTW, I am proably wrong, but I wonder if its a MOSFET or something used as a variable resistor?  When the current is too much, the MOSFET blocks power to the outputs?