[sdiy] circuit protection question

[Stewart Pye]

Hi David,

You really have to use the polyfuse, or at least a fusible resistor of 
appropriate value and power rating that it will blow when current flows 
through the diode(s). Otherwise you'll pull excess current from the 
supply straight through the diode.

Regards,
Stewart.

David wrote:
> On one of the Blacet modules I built, I had an electrolytic cap in
> backwards. It was across the power rails. The poly fuse blew and I was not
> getting +15 volts. Brilliant guy I am, I replaced the polyfuse with a jumper
> and promptly blew the cap. Quite exciting, but I did find the error :)
>
> I have on more than one occasion plugged a power connector in one pin off
> and have yet to blow a module. I too have incorporated the reverse diodes in
> the Steiner project I'm working on. I'm not using the polyfuses however.
>
> David
>
> -- -----Original Message-----
> -- From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
> -- bounces at dropmix.xs4all.nl] On Behalf Of megaohm
> -- Sent: Tuesday, December 14, 2010 10:00 AM
> -- To: blacet at blacet.com
> -- Cc: synth-diy DIY
> -- Subject: Re: [sdiy] circuit protection question
>