Re: Smoothing Capacitor Values
- From: jasen <jasen@xxxxxxxxxxx>
- Date: 2 Oct 2006 08:48:54 GMT
On 2006-10-01, Michael <mqiqcqhqaqeqlqhqiqmqsq@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Yup I'm still here....havn't quite gathered up the courage to finally submit
my order :-)
The circuit won't be connected up to a car though.....(although it will be
connected to a car battery)
What w rating should the resistor be in that circuit? As big as possible I'm
guessing.....
given that a 7805 is good for upto tha 1A and assuming you want to use
all of that, 2W would be plenty.
you may want to use a higher resistance (and larger wattage)
so that the resistor burtns more of the excess voltage leaving less
to heat the 7805.
If that battery isn't going to be connected to a generator (like in an
automobile) the transzorb may not be needed, (it won't do any harm
leaving it in though).
Bye.
Jasen
.
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