[clug] More info, please - was Re: Tridge's coffee contraption - photos

Alastair D'Silva alastair at newmillennium.net.au
Tue Dec 1 05:40:58 MST 2009

> -----Original Message-----
> From: linux-bounces at lists.samba.org [mailto:linux-
> bounces at lists.samba.org] On Behalf Of Alastair D'Silva
> Sent: Tuesday, 1 December 2009 5:46 PM
> To: 'Paul Mackerras'
> Cc: 'Felix Karpfen'; linux at lists.samba.org; hugh at blemings.org
> Subject: Re: [clug] More info, please - was Re: Tridge's coffee
> contraption - photos
> Theres a good example on AVR's site:
> http://www.atmel.com/dyn/resources/prod_documents/doc2508.pdf

Hmm, going back to the application note above, they suggest that the
internal diodes are suitable for clamping an input up to 1000V, but require
external surge suppression for greater voltages. Assuming the PICs have
similar clamping (do they?), what would it take to add surge suppression to
their circuit? Would a MOV to earth do the trick? Is it a suitable
substitute for isolation?


Alastair D'Silva           mob: 0423 762 819
Networking Consultant
New Millennium Networking  web: http://www.newmillennium.net.au
skype: alastair_dsilva     msn: alastair at d-silva.org
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