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555
電子一點也不難
about.me
FHCRC.102nd
FJUEE
Arduino.Taipei (since 2013)
NE555
• Intergrated Circuit
• Low cost & easy to use
• One of the most popular ICs
• Designed by Hans Camenzind ,1970
• Introduced by Signetics ,1971
• 1,000,000,000 units produced in 2003
Image via wiki : http://commons.wikimedia.org/wiki/Category:555_timer_IC#mediaviewer/File:Signetics_NE555N.JPG
A timer ?
555 as A TTL Clock
Waves
Image via wiki : http://en.wikipedia.org/wiki/Frequency#mediaviewer/File:EM_spectrum.svg
Waves
Image via wiki : http://en.wikipedia.org/wiki/Square_wave#mediaviewer/File:Waveforms.svg
555 as A Tone Generator
Amplitude Modulation(AM)
Image via wiki : http://en.wikipedia.org/wiki/Radio#mediaviewer/File:Amfm3-en-de.gif
555 as A AM Band FM Transmitter
Pulse-Width Modulation(PWM)
Image via wiki : http://en.wikipedia.org/wiki/Pulse-width_modulation#mediaviewer/File:PWM,_3-level.svg
555 as A Servo Tester
Link
Useless Machine
Switch
ON/OFF
555 as A Switching Boost Converter
Image via wiki : http://commons.wikimedia.org/wiki/File:NE555_Bloc_Diagram.svg
3 Modes
• Bistable (雙穩態模式)
• Monostable (單穩態模式)
• Astable (非穩態模式)
Demo Video
Let’s get to it…
Workshop
Install ElectroDroid
Go TalkingElectronics
Go Electronics-tutorials.ws
Datasheet of LM555