Hi Kam,

The circuit shown on Page 241 is a pretty typical small system power supply
and is probably the cheapest actively regulated one you can build.  As Andy
indicated, the 7805 is pretty old technology, but it's cheap and won't burn
out if you accidentally short circuit it.  For most projects, I tend to use
the 78L05 which can source up to 100 mA, requires very little parasitic
current from the source (which makes it reasonably well suited for battery
powered applications) and costs about $0.50 more than the 7805.

"Vcc" goes to "Vdd" on the PICMicro (Look at the schematic on Page 240 and
you'll see what I mean).

Good luck on your project!

myke


>Hi all,
>
>Sorry for referring to a book, but my question is about a powersuppy diagram
>from the book "Programming & Customizing the Pic Microconrtoller" by Myke
>Predko. I've been playing around with the PIC16C54/JW using an 4x20 LCD, and I
>want to move it from the carrier board I'm using, and want to make my own
>"small" board. The question I have is in regards to powering this thing. The
>manual says that the pic I'm using will work from 3.0 - 5.5v, and the book on
>page 241 shows a diagram of such a power suppy, my question is what is the
>"7805" indecated in the box? And is it safe to assume that the "Vcc" at the top
>right does to my PIC?
>
>
>
-Kam (^8*
>
>
>===============
>Kam Bansal (^8*
>kamb@jps.net
>
>"Save this email in a smaller font to save on disk space"
>
>

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