AVR-Chat

Hi all,

I am looking at the tiny11 and crystals/oscalators.

As you may know, I an looking at different families of chips to 
figure out which will be better/more uselful to learn.   The PIC and 
AVR both seem relativley equal.

Does the tiny11 have an internal oscalator ?

It appears that the tiny12 does.

My application is a simple one shot timer.  I want to have a motor 
that I control thru my PC's parallel port and have everything on one 
master switch.

When I turn on the PC, it goes thru it's P.O.S.T. and 'excercises' 
the port pins, turning them high and low.  This makes the things I 
have connected turn on and off durning this 20 second period.

I want the chip to receive power, start counting and then after 20 
seconds, turn on a relay.  this would then allow power to the devices.

Also, if I use 2 pins for jumpers, I should be able to select 
different ranges of timings.  say at 10 second units.  I can only see 
the need for 20, 40 and 60 seconds and timing is not important at all 
as this delay just needs to wait until the POST is done.

Funny thing is that at 25 cents each, a 3 pin oscalator will cost a 
few pennies more than the uC !

This seems like a simple beginners project.  wadda-ya think ?

Dave