555

電子一點也不難

about.me

FHCRC.102nd

FJUEE

Arduino.Taipei (since 2013)

http://zh.wikipedia.org/wiki/555%E8%A8%88%E6%99%82%E5%99%A8

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

Link

Class D Amplifier

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