[sdiy] circuit protection question

[Stewart Pye]

Hi David,

I'm not a guru but I use the technique you mention for guitar effects. I
normally use a 100mA hold polyswitch.  I've been meaning to put them on
synth PCB's but haven't bothered yet. Depending on what is in your
circuit, it can be a good idea to use a schottky diode so that the
voltage developed is not high enough to damage anything.


Cheers,
Stew.

David G. Dixon wrote:
> Here's a question for the gurus:
>
> Do you generally bother with circuit protection, specifically against power
> rail reversal?
>
> If so, which technique do you typically use?
>
> I'm thinking: power rail, to polyfuse, to reverse rectifier diode (e.g.,
> 1N4001) to ground, to circuit.  The diode will protect the circuit while the
> polyfuse trips.  Does this seem like overkill?
>
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