EEVblog #555 - 555 Timer Kit

Dave celebrates the classic 555 timer IC by building the Evil Mad Scientist "three fives" discrete timer kit.
Some scope measurements and an explanation of the internal 555 timer circuitry follow.
Construction:
Testing:
Circuit Description:
Waveforms:
Classic old Signetics 555 timer datasheet:
The kit:
Han's Book on Analog chip design: /
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