[sdiy] 25 chips that shock the world! Your top game changers?

[dragons]

Hi,
well for me one of them would be the 741 op amp !
[ or maybe a later jfet version ? ].
the 555 timer would be even better if it was more stable in frequency.
of course the ssm and cem chips are very useful.
I would also include the ca3080 or lm17000 OTA .

regards Peter  B