I've added a new chapter at SgtWookie's suggestion, The 555 and PWM.
If you get a chance please review it. Thanks.
http://forum.allaboutcircuits.com/showthread.php?p=117636#post117636
If you get a chance please review it. Thanks.
http://forum.allaboutcircuits.com/showthread.php?p=117636#post117636