Re: Darn.
Date: 1998-06-16 22:21:48

Hallo Martijn,

Aan 9-06-98 12:33, in bericht <>, Martijn van 
Buul <> schreef:

> Martijn van Buul wrote:
> > (Oh yeah. Because it has two 7805's.. Hmmm..)
> And one of them was broken. The thing works now, yet I don't feel at ease.
> I'm not quite sure that I fixed the real cause, since those regulators
> get just a little too hot. (Hotter than the ones in my 3032, while it has
> the same motherboard). Time will tell.

To be sure of a good working 7805 the difference between in- and output must be 
minimal 3 Volts. The warmth the 7805 produces is the result of 'difference in 
voltage' times current (Watt = Volt * Ampere). If the Vdiff is more the 3 Volt 
you can reduce it by placing a resistor or several diodes between the 7805 and 
the original powersupply. The 7805 will generate less heat in this way but this 
lesser heat is now generated by the R or Ds.I prefer the diodes because it is 
easier to spread the generated warmth. 

Groetjes, Ruud

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