AVR-Chat

Hi,

I have to agree witrh those talking about power problems, it sounds to me also like a typical "brown out" problem....

If it was happening to me, I would be using a 'scope and a good DVM - Together! To analyse the problem as best I could.....

If I understood you correctly, you made changes to the power in some manner (why as any normal PC supply delivers a good stable voltage!)

BUT, a PC power supply is generally a switched mode power supply and putting a linear regulator after it is HIGHLY NOT recommended!!!!

Also a linear regulator needs some "headroom", after a PC power supply THERE IS NO HEADROOM left here !!!! I think this is your problem!! 

The linear regulator is dropping anything up to 2.5 volts.......depending upon its type and the actual load of course.....

I am a great believer in "Belt & Braces (suspenders for you yanks!!)", but here its WRONG WRONG WRONG.....

And doing it without checking/using a DVM/Scope is also WRONG WRONG WRONG.....

I hope this helps you further.....

Greetings from

Andy Mathison

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