You are holding a 555 timer so that there is an indentation on the left-hand side of the IC. Pin #1 is located on the
A) lower left-hand side of the chip.
B) upper left-hand side of the chip.
C) lower right-hand side of the chip.
D) upper right-hand side of the chip.

Question

Quizplus · Accepted Answer

Pin #1 on a 555 timer IC is located on the lower left-hand side when the indentation (notch) or dot is facing upwards and towards the left. This orientation is standard for identifying pin configurations on integrated circuits.

You Are Holding a 555 Timer So That There Is