[sdiy] Basic circuit safety...

[Stewart Pye]

Or a polyswitch with a suitable trip current rating so that the diode 
doesn't pop with reverse polarity, but there is plenty of current to 
supply the circuit without the polyswitch cutting out.

Cheers,
Stew.

René Schmitz wrote:
> Christian Bergmiller schrieb:
>
>> b) use a diode in parallel with the dc socket (wrong polarity voltages
>> will be short cut / no good idea in case of AC adapters)
>
> In that case I'd include a fuse before the diode, so the circuit 
> breaks if the wrongly orientated supply is shorted by the diode.
>
> Cheers,
>  René
>
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> uzs159 at uni-bonn.de
> http://www.uni-bonn.de/~uzs159
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