Figure 1 This classic 555-based timer is valid only for duty cycles greater than 50%. Figure 2 The simple addition of a bypass diode makes this timer circuit valid for low duty cycles. Diode forward ...

If you know some other 555 software please write a comment with the link. Thank you and I hope this will help you.

The history of the 555 timer. What are the 555's modes of operation? About my book to help teach those young and old about 555 timers. element14’s 555 timer contest. The 555 timer celebrated the 51st ...