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Posted by: HTKsarah

Video duration: 327 seconds
Global video hits: 1082

Light Sensor Circuit
Posted by: justvisiblesilence

Video duration: 367 seconds
Global video hits: 18609

Latest comments made on this video:

i finally ...
By: shelladavis. on 26 Dec 11, 18:21:12
i finally understand? thank you

lastly a straight ...
By: guruakagos. on 03 Oct 11, 08:27:29
lastly a straight forward question eh, i have a 3V-4.5V motor and a power source of 3-4.5V i need an ldr (or anything else that might work) in between this two,? to cut the supply to the motor if there is too little light detected.

hey also, i'd like ...
By: guruakagos. on 03 Oct 11, 06:04:53
hey also, i'd like to ask why do i need the rest of the components? can't it just be a simple circuit, a power source connected to an LDR connected to and LED. when you cover the LDR the? LED doesn't light and when the LDR is exposed to light the LED does? can that work?

It can still work ...
By: justvisiblesilence. on 27 Sep 11, 00:12:13
It can still work with 6V. Any lower than that it may not work. You can try using a "Photo transistor" instead of a light dependent resistor.?

It's? called BJT ( ...
By: justvisiblesilence. on 26 Sep 11, 23:56:16
It's? called BJT (Bi-polar Junction Transistor)

and also? is it ...
By: guruakagos. on 26 Sep 11, 07:10:12
and also? is it still possible if my circuit runs on 3V? is there any changes i should make?

hey? whats the name ...
By: guruakagos. on 26 Sep 11, 07:03:56
hey? whats the name of the transistor again? ujt?

Thank You for your ...
By: joshstube. on 09 May 11, 11:43:59
Thank You for your video & explanation. I have had trouble with switching loads from the emitter side of the transistor. I can only get it to work if I connect the emitter to ground and sourcing the negative side of the load. Also, If? you switch the resistor/LDR won't it work in reverse (like a photo light outside)? thanks for your demonstration

Excellent video but ...
By: strangerlover11. on 31 Mar 11, 17:05:02
Excellent video but you did't mentioned the measurement of LDR how many voltage should be ? and if? i use PNP transister rather than NPN than.........???

dude i need a ...
By: kakulugiashthegreat. on 08 Oct 10, 13:10:41
dude i need a circuit which can light when it is dark and? turn off after five mins help me please

To make it light at ...
By: kraudio7. on 08 Jul 10, 10:15:21
To make it light at night, just? place de LDR were the 22k resistor is, and place the 22k resistor where the LDR is.

Excellent!?
By: stegtenudlar. on 05 Jul 10, 10:16:55
Excellent!?

very good. only i ...
By: mooreno444. on 20 May 10, 02:32:45
very good. only i need , with? night .

No it? would be a ...
By: hotsawse007. on 15 Apr 10, 19:29:52
No it? would be a dark matter detector. Haven't you seen the movie Angels and Demons?

yeah....may be... ...
By: man13preet. on 18 Feb 10, 16:09:54
yeah....may be... once i made a light detec. with BC 547...with right polarity...means connection were right with collector and emitter.... so i decided it with 2n3906...i didnt knew? its C B E pins...so as i connected, it didnt lit up...so when i put off the lights....it lit.... try .... thats the way... :-) :-) :-) :-) :-)

i luv your ...
By: smellyfry. on 11 Feb 10, 05:11:36
i luv your singaporean accent! great tutorial. Well? done.

If the emitter and ...
By: penixnet. on 21 Aug 09, 01:09:21
If the emitter and collector connections were reversed..would it? make the circuit into a dark detector?

Automatic Projector Calibration with Embedded Light Sensors
Posted by: jcl5m

Video duration: 281 seconds
Global video hits: 670754

A demonstration video of a technique used to automatically discover the locations of surfaces in the projection area using embedded light sensors. Project by Johnny Chung Lee - Carnegie Mellon University, 2003.

Related: projector, calibration, augmented, reality

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Latest comments made on this video:

You? Are a F..g ...
By: 123Lizzo123. on 22 May 12, 10:53:22
You? Are a F..g Genius Maaaaan!

you got a problem ...
By: K95369. on 13 Apr 12, 00:21:16
you got a problem with? asian's?

FLYING !?
By: stefbreuer. on 30 Mar 12, 17:33:02
FLYING !?

you lost weight?
By: walterknows. on 19 Mar 12, 20:32:28
you lost weight?

Gods man!!! ...
By: Felipe2Feliz. on 02 Mar 12, 22:26:48
Gods man!!! Congrats are in? order.

THE FUTURES? AWESOME
By: wolfmankurd. on 29 Feb 12, 18:21:01
THE FUTURES? AWESOME

Not sure about the ...
By: urzaspath1234. on 29 Feb 12, 11:20:59
Not sure about the controller but the cables are fiber optics i? believe If this helps any?

Level: ASIAN? \m/
By: jeyessh. on 21 Feb 12, 11:38:17
Level: ASIAN? \m/

can any body tell ...
By: MrSANSA1. on 02 Feb 12, 18:53:03
can any body tell me that are the things that he is using on the back of the screen and where can i get them ....?? i`ve been looking? all ever the web and i can`t find no information about it..... can someone hell me with that??

This guys very ...
By: limanaid. on 11 Jan 12, 07:19:00
This guys very impressive, He SERIOUSLY needs some kind of award. ?

Why does the? first ...
By: lugit2001. on 21 Dec 11, 05:58:38
Why does the? first top comment have less likes than the second?!?!?

Ok where? can I get ...
By: WillParry79. on 14 Dec 11, 22:56:31
Ok where? can I get something that uses this?

Without nerds, you ...
By: rpglover101. on 14 Dec 11, 18:23:11
Without nerds, you wouldn't have a computer or internet to troll? with. Heck, we wouldn't even have electricity or lights. Now shut the fuck up.

? Pffff.....'tags' ...
By: imdxlr8r. on 30 Nov 11, 18:17:23
? Pffff.....'tags'? Shut up loser.

fucking nerds I ...
By: toie323. on 16 Oct 11, 20:13:31
fucking nerds I used to beat up tags? like u

I cant? wait when ...
By: animes25. on 11 Oct 11, 05:58:07
I cant? wait when it can calibrate at 30 fps

That is cool!! ?
By: DoctorDustPHD. on 13 Jul 11, 23:06:13
That is cool!! ?

That is? SO cool!
By: treva31. on 07 Jun 11, 12:43:20
That is? SO cool!

Amazing? work!
By: thresisball. on 07 Jun 11, 00:10:18
Amazing? work!

I? bet you have a ...
By: hellothango. on 18 May 11, 12:13:09
I? bet you have a tiny wrinkled brain

@jcl5m Amazing is ...
By: peavri. on 23 Apr 11, 17:51:36
@jcl5m Amazing is the calibration pattern horizontal and vertical by using half. I don't know it is possible but you can use different spectrums of visible light (or not visible) and shot all simultaneous and then separate by a prism and done the process all at same time virtually. I see a problem for larger resolutions; you may need to spend more? time in the calibration process.

i want to see real ...
By: hmzLOL. on 17 Apr 11, 17:25:25
i want to see real time tracking so you can use any surface as a? moitor

wow!?
By: automateanything. on 11 Apr 11, 10:38:49
wow!?

Have you thought of ...
By: toadill. on 08 Apr 11, 04:02:19
Have you thought of putting the projector inside a disco ball or a sphere so that it mirrors the projection? to everything around you. You could then wrap the screen the whole way around the player and have a 3D world if you included the head tracking technology.

incridible!!! its ...
By: ogatramastef. on 01 Apr 11, 00:46:42
incridible!!! its just? incridible

FLL Product Demo 2011 - Light Sensor
Posted by: FLLGlobal

Video duration: 54 seconds
Global video hits: 3847

Minecraft Tutorials - Easy Light Sensor
Posted by: IChooseMoo

Video duration: 114 seconds
Global video hits: 5793

Hope this helped a few of you out! Twitter - www.twitter.com Get the new snapshot - mojang.com

Related: light sensor minecraft, light sensor mod, minecraft sensor mod, day, night, cycle, light, sensor, redstone, pressure, plate, torch, ore, wire, repeater, spawner, egg, zombie, 12w04a, snapshot, snap, shot, snap shot

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Latest comments made on this video:

mob spawner,traps?
By: bernardo367. on 19 May 12, 14:00:25
mob spawner,traps?

Protip: Hook up a ...
By: MajorMayjor. on 15 Mar 12, 22:03:03
Protip: Hook up a bunch so it has like 4 or 5 so it is on when at least 1 zombie and/or skeleton is on the plates, because there is a VERY small chance they'd all be out at the same time (see CaptainSparklez's 1.2 update for other? ways to build it as well).

There could be LOTS ...
By: theace9000. on 14 Mar 12, 19:44:02
There could be LOTS of possible uses for this sort of thing! For example, skeleton and zombie killer: 1) Build a house. 2) Build this behind it. TIP: Leave a window to attract them 3) Make it somehow so when the zombie/skeleton steps on the pressure plate, it triggers a dispenser that shoots arrows. You sir/mam are so very? welcome.

COOL!?
By: AndyM859. on 14 Mar 12, 01:26:16
COOL!?

lure then build the ...
By: m24dan. on 13 Mar 12, 20:16:19
lure then build the wall:)?

Exactly what I was ...
By: CalissaLeigh. on 08 Mar 12, 16:25:59
Exactly what I was going to suggest.? ;)

Whats the mean?? :|
By: TheEgis13. on 06 Mar 12, 13:59:45
Whats the mean?? :|

iwould use a ...
By: StopIsMotionProd. on 06 Mar 12, 04:04:34
iwould use a villager, and have four of them in different? boxes because they WILL go in when its dark, and will possibly go outside during the day. (1 out of four)

well they go out ...
By: 321HOKAGE. on 28 Feb 12, 01:58:01
well they go out becuas eif thye stayed there they would never die and zombies would overrun? minecraft

what? is the point ...
By: hapkido150. on 27 Feb 12, 23:37:52
what? is the point of this.

only one problem... ...
By: ChristianNuts. on 25 Feb 12, 08:57:18
only one problem... the zombie takes damage? and will die if not despawn first... :)

Or........ Make? a ...
By: thepwnage72. on 25 Feb 12, 01:26:28
Or........ Make? a clock!

Ever heard of a ...
By: TheSanaBrick. on 25 Feb 12, 01:02:33
Ever heard of a watch??

wouldn't it be ...
By: Sysdroc. on 22 Feb 12, 19:17:52
wouldn't it be easier to use? torches?

Wont zombies? ...
By: MsNirvanaBanana. on 18 Feb 12, 15:54:49
Wont zombies? despawn?

I found a use for ...
By: EpicKingJack. on 12 Feb 12, 13:03:09
I found a use for this.........an xp? trap

I think you should ...
By: xalixilax. on 09 Feb 12, 14:02:24
I think you should use villager because they just don't despawn and will? not die from the sun

and at night he ...
By: Rizzler97. on 07 Feb 12, 08:00:11
and at night he would walk around freely, on and? off the pressure plate

Great idea, but the ...
By: Pikachuchu7755. on 05 Feb 12, 14:04:39
Great idea, but the zombie? will eventually despawn......

yes, but? he will ...
By: Ian5133. on 04 Feb 12, 02:09:17
yes, but? he will die eventually.

You can connect ...
By: SteelPokemonFan. on 02 Feb 12, 18:56:58
You can connect some Redstone to a dungeon with a Spawner (Zombie or Skeleton), and just have it so there is a hole for Zombies/Skeletons to? spawn. Everywhere else that the Zombies/Skeletons could possibly spawn must be blocked by cobblestone, dirt or some other block. Put a Stone pressure plate in the hole so that at night, a mob will spawn on the pressure plate, and then will burn to death in the day. This is pretty much a darkness sensor, but you can easily invert the signal if you wish.

lol thats is? the ...
By: world295. on 01 Feb 12, 21:05:56
lol thats is? the most retarted comback, at least im not some fucking noob that can only reply with a meme :D fuck you

L0l umad??
By: socoooldddd. on 01 Feb 12, 19:45:27
L0l umad??

connect the plate ...
By: tomek123kotek. on 01 Feb 12, 00:48:06
connect the plate to a poison dispenser so the zombie gets healed after it? stops burning

What happens ...
By: nopefully. on 01 Feb 12, 00:35:05
What happens during? the night?

Fossil MetaWatch demo - Accelerometers, light sensors, Bluetooth oh my
Posted by: IntoMobile

Video duration: 97 seconds
Global video hits: 9124

Fossil MetaWatch demo. This Bluetooth watch is a companion for your smartphone and streams all notifications to your wrist. It has accelerometers, light sensors, Bluetooth and LCD displays. This demo was done at Google I/O 2011 San Francisco.

Related: fossil, metawatch, demo, review, hands on, hands-on, bluetooth, accelerometer, sensor, lcd, google io, google, android, san, francisco

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Clap On/Off (version two) and Light Sensor Circuits
Posted by: patrickikis

Video duration: 173 seconds
Global video hits: 8284

Several circuits: clap on/off and light sensor designs.

Related: sensor, 555, timer, parelle, port

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Latest comments made on this video:

i? just got clap on ...
By: 23candylover. on 27 Nov 11, 23:15:01
i? just got clap on lights on sale for 10 bucks at walgreens!!

please upload your ...
By: TheAniketyannewar. on 14 Jun 11, 07:06:54
please upload your email id also!! u must be making made-to-order circuits right?? m? interested in one of them!! let me know your email id mine is aniket.yannewar@gmail.com

Neat.?
By: 7NEOMAN. on 28 Nov 10, 14:55:34
Neat.?

@patrickikis ...
By: austerbpo1. on 25 Oct 10, 10:23:50
@patrickikis please send me the diagram please i also want to make this i love this . :) please please send me? austerbpo1@gmail.com

I really like your ...
By: joebro391. on 09 Sep 10, 17:34:06
I really like your circuit. I just made one myself but yours looks so much simpler! haha, do you have a circuit diagram? Or should I just purchase one of your units in your ebay page? The only reason why I don't just buy one is I really like to learn this stuff, not just put it together, so I don't want a really cookie-cutter, paint-by-numbers guide, if that's what you sell. No offense, I just don't what you offer. Any feedback would be nice. Thanks. ? -Joe

That's a really ...
By: boboooo55. on 14 Aug 10, 23:22:57
That's a really good job man, I'm impressed :) Keep on doing? things like that :)

Hello friend, could ...
By: DrakePhoenix. on 30 Dec 09, 21:43:28
Hello friend, could show the diagram? to make the circuit on and off focus? Thank you.

i have no clue? ...
By: scooterman14. on 12 Jul 09, 04:39:09
i have no clue? what this shit is but thats cool.

how many? ic does ...
By: toxicfrost123. on 29 Sep 08, 06:32:23
how many? ic does that have. lol

Thanks.? Well, any ...
By: patrickikis. on 30 Jul 08, 00:21:44
Thanks.? Well, any book you can find on basic electronic devices and any book on digital circuitry would work well. I graduated as an electronics engineering technician. I just love doing this stuff in my spare time.

Good? Job
By: davidvro. on 29 Jul 08, 23:46:09
Good? Job

Good job on the ...
By: davidvro. on 29 Jul 08, 23:22:26
Good job on the circuits, are there any books you might recommend to someone in a? semiconductor - etc. class?

Light Sensor
Posted by: davbeck2835

Video duration: 31 seconds
Global video hits: 12804

The comparator light sensing circuit from the book, "Robot Building for Beginners" on a solderless breadboard. Motors not included.

Related: robots, led, electronics, quad, comparator, transistor, photoresistor

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