[Astable multi vibrator, some help?]

Ok, thanks a ton.

[Astable multi vibrator, some help?]

I have been using the schematic for awhile now and its working fine.  When both buttons are pushed, both guns on the game shoot at the same time and same speed.  If I was to take out the variable resistor, would I replace the link between the 5v and R3,R4 with a 100k resistor, just a wire, or anything else?  If I used just wire, would the LEDs flash faster or slower?  What could I use to make it shoot really fast?  Thanks

[Astable multi vibrator, some help?]

Oh sorry, I forgot to post the values.  Here they are
R1(variable resistor) - 100K
R2, R5 - 470 Ohm
R3, R4 - 4.7K Ohm
R6, R7 - 1.8K Ohm
T1, T2, T3, T4 - 2n222(or any other switching transistor)

[Programing an IC, how does it work?]

I was thinking, how do you just plug an IC into a programer, put some stuff on it and it works?  Whats physically inside of an IC? 

[Astable multi vibrator, some help?]

Hello.