The PIR Sensor - Motion Activated Art

In response to a viewer request Ellsworth designs a circuit for generating music, sound effects and motion control for an art installation. It uses the unique properties of the passive infrared sensor to detect motion and direction of people in the room. For more information visit http://www.element-14.com/community/groups/jeri-ellsworth

Used in the project:
Passive Infrared Sensor (PIR)
TI LaunchPad MSP430
Opamps
Gear reduced motors
MIDI Devices

Category:

Science & Technology

Tags:

• none (add) mcu
• microcontroller
• amplifier
• board
• ask_expert
• control
• security
• motion
• infrared
• passive
• motors
• sound
• music
• effects
• opamp
• operational
• msp430
• developer
• pir
• jeri_ellsworth
• ellsworth
• jeri
• midi
• lauchpad
• Element14

[jayantismyname]

1:30 on the PIR circuit what does .luf stand for. please help thank you.

[jeriellsworth]

@jayantismyname .1 micofarad It's a measurement of capacitance.

[linagee]

Did you consider using an Arduino?

[jeriellsworth]

@linagee Sure. I have a few of them kicking around the shop. Programming isn't the area I like to work normally, so I don't go out of my way to add MCU's to hobby projects.

[nullt0ne]

What type of Oscilloscope are you using?

[jeriellsworth]

@nullt0ne That is lower end Tek 100mhz 4 channel.

[jeriellsworth]

@rohanr2 I simulated with LTSpice. It's a free tool from Linear Technologies.

[jeriellsworth]

@lumaix That's easy? Guess it's all perspective.

[sonicfuker]

What in the fuck. You're shot.

[titoo3071]

youtube.com/watch?v=k0g64fo5HP­0

[titoo3071]

dear beautiful lady, good work, if i were supposed to do it i would have done to play the musical notes such as in a music. what i meant is the notes played here are not music it is like a noise what i prefer you to do is to select the musical notes and play it. so that the playing shall be like a music and not like a noise. because i know to play keyboard the sound here are like not music. if you need any help from me? you can.

[TheBern0ulli]

Hi,

You said that the 1kohm and the .1uF reject frequencies greater than 10Hz? I think I'm missing something but: Fc=1/(2*pi*RC) the 3dB attenuation for the component values given isn't ~1.59KHz? I might be missing something here.

Thanks,

[freezzertime]

Thank you, thank you, thank you!

[MrTryg]

Thanks a lot for posting this video. It's really great. Taught me bundles in just under 7 minutes. I'm happy too to see the MSP430. I have one and have only just nibbled at it yet. It's very cool. Thanks again!

[catman72]

loved the laser trick :-)

i use 4 laser pointers (hotglued parallel) to check optics.

its a trick i saw in a museum, they explained optics to kids.

well, i'm a kid too. fits me perfectly.

[plazmafeld]

That was hot, tell me more, an make yr dance a little longer, an can i build a spaceship in yr back yard?

[imanonymous93]

As if an attractive girl is teaching me electronics:L

[jayantismyname]

@jeriellsworth Oh! I Thought it was L.... TY.x