Ok, I admit, my fridge has a problem :)
So this is not an EMI issue, but a spike one. Ok, the solution I found
is to insert an 100nF capacitor between VCC and GND, this will solve the
reset problem. I have 2 boards, one with an 100nF cap and one without.
The one without the capacitor was resetting, so I will take this as a
general rule with my microcontroller boards, inserting the capacitor.
As with the fridge, I'm too busy to fix his problem :)
Thank you for your kind support !

Lucian
-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Morgan Olsson
Sent: 13 mai 2004 11:26
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:] EMI Filtering for Linear Power Supply

When the frigde STARTS the line voltage DROPS.
When it STOPS it produce spike and EMI.

As other say, desing so it accept lower input voltage

/Morgan

Lucian 22:25 2004-05-11:
>Hello all,
>
>I am designing a 12V linear power supply and now in the final stage I
>see I have some problems with the EMI (or so I guess). I have a circuit
>powered from this supply and when the refrigerator in my room starts,
it
>resets the circuit.

--
Morgan Olsson, Kivik, Sweden

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