Whenever I use the 555 timer, it seems that the output polarity is invariably incorrect, and the way the 555 functions, it normally cannot generate a duty cycle of less than 50% — 90% yes, 10% NO!

[FightCube] wrote in recommending a very helpful piece of circuit simulation software for those of you still constructing entries for the 555 design contest. LTSpiceIV, available from Linear ...

This was shown in the “Inductor-based astable 555 timer circuit”. In Figure 1, we present another approach for an inductor-based astable 555 multivibrator. Figure 1 An astable 555 timer circuit based ...