Delay for momentary circuit

Hi everyone, I'm hoping I can elicit some EE help :)

I'm planning on using the Constant to Momentary circuit listed on this site to fire up a computer I have hooked to my switched 12v source.  This would work perfect as is, but through much frustration I figured out that my inverter needs about a second or two to warm up before outputting.

So I'm using this design right now...

with the momentary 12v output leading to a relay that shorts my "On" button for my computer.

So my question is this: what would I need to do to delay that momentary output from happening for 1-2 seconds?

ECG191 Now Obsolete

2N6558

SK3232

BF859a

MJE340 if 100ma or less

The Original is 500ma 300v

Here are some more! I have many.

cool, I think I'll use the 555 monostable circuit 'cause I'll be able to get all the parts from the ratshack :)

but real quick, I'm assuming that that diode is a standard 1N4001 & that round thing is the "motor"(ie, what I'm supplying power to)?

sorry, I forgot to ask before, what's the difference in the letter prefix of the timer chip?

radioshack has the TLC555 and the LM555, are these ok instead of the UA555?

I'd prefer to buy locally just cause its a little quicker, thanx!

micro 10-6 0.000 001

The Timer IC is the same IC but Different Manufactures have their own Prefix at the beginning.

And the Diode 1n4001 or 1n4002 0r 1n916 it really doesn't matter which one it just protects the IC from spikes.