[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 ...

The 555 Design Contest shook a whole bunch of really creative circuits out of the trees ... the three main logic blocks inside the familiar timer on pieces of copper-clad board.

Commercially, this IC is available in 8-pin circular, TO-99 or 8-pin DIP, or 14-pin DIP packages. The salient features of 555 timer ICs are Compatible with both TTL and CMOS logic families. The ...