
Homage to a
Handmade Chip
FEATURES The 555 Timer at 50
18 makezine.com
CHARLES PLATT is the author of the bestselling Make: Electronics, its sequel Make:
More Electronics, the Encyclopedia of Electronic Components Volumes 1–3, Make: Tools,
and Make: Easy Electronics. makershed.com/platt
Charles Platt, courtesy Pia Camenzind
A through-hole
555 chip measures
about 0.4"×0.3".
Surface-mount
versions have
identical pin
functions.
Hans Camenzind,
in 1971 when he
was developing the
555, and in 2002.
THE WORLD’S MOST
POPULAR INTEGRATED
CIRCUIT TURNS 50
Written by Charles Platt
A
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