Anyone know where I can get a LM7805 regulator for eagle PCB? I can't seem to find a library file on their site or on google for it.

Also, what capacitors should I put + to GND either side of the regulator? 10nF? ceramic? which ones!?!?

 

It all depends on the package or footprint of the 7805 that you are physically going to use, the most common is the TO-220 (kinda big with a metal tab with a large hole drilled in it sticking out of the top).
[img]www.daro.it.pl/img/to220.gif[/img]

a ceramic cap should work.

__________________
Jeff Zimmerman
To the optimist, the glass is half full.
To the pessimist, the glass is half empty.
To the engineer, the glass is twice as big as it needs to be.

 

yes, it looks like the picture.

 

try typing in "Regulator"..

 

bah! sometimes its really hard to find what you want. Now I'm looking for an LDR and a small piezo beeper thing but can't find one of either

 

Get a data sheet for any generic 7805, many companies make them and they're all pretty much the same. Look at the packages they come in, TO-220, DPAk, SOT-23 (I think that one is right...) and pick the package that you want to use. TO-220 is the only through hole package I know of off the top of my head for the 7805. Once you pick the package, make a new part and select its PCB footprint (I assume this is how you do it in Eagle).

There should also be a reference design in there showing what cap values should be used. Keep in mind that the reference design is flexable and may be changed due to other factors such as ripple/noise on your input line and how quickly current is demanded from your load etc.

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A rectangular bear is just a polar bear after a coordinate transform. -- I dunno who.
A recent study shows that research causes cancer in rats. -- I dunno who said that one either.

 

Hi,

I managed to find the LM7805 I needed when I searched for "regulator" and looked through all the results - strange way of searching when it won't find it when I try LM, 7805, LM7805, etc.

I'm now looking for a piezo and LDR.

The circuit is a simple PIC circuit and all the diagrams I hav eseen show the LM with a 10nF nonpolarised cap from +V to GND either side of the regulation.

 

Can't help you with the peizo much, try www.digikey.com if you havn't already. I like their search engine.

National semi has a nice power supply part builder too, www.national.com (I'm assuming LDR is Low Drop Regulator but I'm not certain...)

__________________
A rectangular bear is just a polar bear after a coordinate transform. -- I dunno who.
A recent study shows that research causes cancer in rats. -- I dunno who said that one either.

 

Yeah you have to saerch by part name , not number even though they list it by number..
thats just the way it works. :roll:

 

i think he means light dependent resistor. if im not mistaken eagle has a footprint for an LDR. i dont remember where it is. but even if it is not there you can easily define the footprint for an LDR. its only two holes separated by about 1mm

 

yeah I can't find a Light Dependant Resistor or Piezo on there at all. The Piezo I'm talking about is a little cylinder shape thing, about 1cm high, with 2 pins about 5mm apart.

 

and thats all the data you need to define the footprint 8)

 

oh duh... he's talking about footprints for parts. I had it in my head that he was looking for parts that he could use :P Silly me

__________________
A rectangular bear is just a polar bear after a coordinate transform. -- I dunno who.
A recent study shows that research causes cancer in rats. -- I dunno who said that one either.

 

well I was looking for the symbols for the schematic too.

 

you can do that easily. just draw a circle for the LDR and the Piezo 8)

have fun