Author Topic: What's this please? (Component Advice)  (Read 561904 times)

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Offline amyk

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Offline nali

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Re: What's this please? (Component Advice)
« Reply #901 on: February 05, 2016, 12:27:48 pm »
Ceramic heat sink. Supposedly more efficient than regular ones, but nearly impossible to clean...

http://uk.farnell.com/amec-thermasol/mpc151525t/heat-sink-ceramic-15-15-2-5-std/dp/1892471
http://www.banana-pi.net/index.php/en/product/banana-pi/heat-sink/sic-ceramic-heat-sink-for-banana-pi-detail

That's the one, thanks!  I actually took a quick look through that section of Farnell's site as I buy most of my components from them but missed that   :-[
 

Offline crazyjim30

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Re: What's this please? (Component Advice)
« Reply #902 on: February 05, 2016, 10:30:16 pm »
Could someone please help me ID this? The closest anyone has been able to come to a positive ID is "some type od audio related equipment".

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Offline oPossum

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Re: What's this please? (Component Advice)
« Reply #903 on: February 05, 2016, 11:00:13 pm »
Crossover network for a 2 way speaker.
 

Offline crazyjim30

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Re: What's this please? (Component Advice)
« Reply #904 on: February 06, 2016, 05:41:14 am »
Crossover network for a 2 way speaker.
Thanks. That came in a "grab bag" of random components and stumped the entire EET department.

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Online Brumby

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Re: What's this please? (Component Advice)
« Reply #905 on: February 06, 2016, 06:15:07 am »

... and stumped the entire EET department.


Seriously?  Wow.
 

Offline bills

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Re: What's this please? (Component Advice)
« Reply #906 on: February 06, 2016, 06:30:09 am »
+1 yes it is sad that they did not know what it was (or is)
Never argue with idiots. They drag you down to their level and beat you with experience.
 

Offline crazyjim30

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Re: What's this please? (Component Advice)
« Reply #907 on: February 06, 2016, 06:31:13 am »
Well, they were able to isolate it to "audio component". That's something. ????

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Offline Richard Crowley

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Re: What's this please? (Component Advice)
« Reply #908 on: February 06, 2016, 06:33:37 am »

... and stumped the entire EET department.


Seriously?  Wow.

There seems to be a whole generation (or two?) of people who have never practiced "Don't turn it on, take it apart!", and likely don't even understand why anyone would do that. They are appliance operators who don't have the slightest clue (or even curiosity) what's inside their high-tech toys.  Users of a certain brand of computers and other products named after a common fruit are a prime example of this "dumb-user" class.
 

Online Brumby

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Re: What's this please? (Component Advice)
« Reply #909 on: February 06, 2016, 06:43:00 am »
I wouldn't have thought that would have applied to an EET department!
 

Online Brumby

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Re: What's this please? (Component Advice)
« Reply #910 on: February 06, 2016, 06:46:53 am »
Users of a certain brand of computers and other products named after a common fruit are a prime example of this "dumb-user" class.

Just read that again....

 :-+
 

Offline helius

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Re: What's this please? (Component Advice)
« Reply #911 on: February 06, 2016, 07:39:46 am »
I take exception to your careless slander of Apricot PC users!
 

Online Brumby

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Re: What's this please? (Component Advice)
« Reply #912 on: February 06, 2016, 07:45:52 am »
Awww.....  The Apricot.         *fond memories*

I remember them when they first came out.  They weren't too bad.
 

Offline Alexei.Polkhanov

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Re: What's this please? (Component Advice)
« Reply #913 on: February 10, 2016, 05:47:16 am »
This Mitsubishi chip is coming from 1990s wireless modem. My Google-fu technique is pretty good but I failed to find any reference to it. What is this? Mixer, amplifier, filter?  Perhaps somebody recognize this or somebody know how to look it up?
 

Offline lonetos

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Re: What's this please? (Component Advice)
« Reply #914 on: February 12, 2016, 01:19:35 pm »
Dear Forum members,

Does anybody have clue where I can find the datasheet of this IC ? It seems to be re-badged or something. Seems to look like this one, VX1937   VGA-to-AV/S Video Converter, but the crystal which is on the pcb is 24Mhz not 27Mhz...

Thanks in advance.

Toshio
 

Offline Alexei.Polkhanov

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Re: What's this please? (Component Advice)
« Reply #915 on: February 12, 2016, 09:03:50 pm »
Dear Forum members,

Does anybody have clue where I can find the datasheet of this IC ? It seems to be re-badged or something. Seems to look like this one, VX1937   VGA-to-AV/S Video Converter, but the crystal which is on the pcb is 24Mhz not 27Mhz...
Did you try checking pins? If Ground pins, power pins and other pints that you can identify are on same positions then it must be just re-branded IC you guessed.
 

Offline lonetos

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Re: What's this please? (Component Advice)
« Reply #916 on: February 13, 2016, 09:39:39 am »
Yes I tried checking some pins, but I can't find the datasheet of the vx1937 (pin layout) either, so this makes it a bit harder. Well maybe its just better to put this vga converter in the bin, and connect my c64 to a lcd instead of an old crt :)
 

Offline vk6zgo

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Re: What's this please? (Component Advice)
« Reply #917 on: February 13, 2016, 11:23:56 am »
Awww.....  The Apricot.         *fond memories*

I remember them when they first came out.  They weren't too bad.

We had an "Orange" at work.
I only remember the name because of the time I upset everyone.

The "Computer Guru" had written a nice program that allowed you to enter the name of a remote radio or TV site,& it would show the status of that station.

In its final form,it was intended to dial up the site & download the data ,but at the time was set up with a dummy source of information.

I entered "Kununurra",& it went crazy,scrolling through every station on the network.
It turned out that the programmer had misspelled the station as "Kununarra".

I swore off Computers for a while!
 

Offline BobbyK

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Re: What's this please? (Component Advice)
« Reply #918 on: February 21, 2016, 05:55:16 pm »
I got plenty of these in a grab bag. Wondering what they are, and how they can be used. There is a part number but I cannot find any datasheet. Looks like some sort of LED/optical component. Would be great to know how to use the component.





 

Offline tautech

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Re: What's this please? (Component Advice)
« Reply #919 on: February 21, 2016, 06:51:07 pm »
A guess would be an LDR, but never seen one in a package like that.  :-//
Avid Rabid Hobbyist
 

Offline djQUAN

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Re: What's this please? (Component Advice)
« Reply #920 on: February 21, 2016, 07:04:24 pm »
I would guess some kind of photo diode/transistor for quadrature sensing.
similar to here: http://www.didel.com/microkit/encoder/Encoder.html
 

Offline bktemp

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Re: What's this please? (Component Advice)
« Reply #921 on: February 21, 2016, 10:04:45 pm »
My guess: It is a position sensor. I have a similar sensor in a different package. It is either 4 independent photodiodes, or a single large photodiode with connections on all 4 sides. If you measure and compare the 4 currents you can estimate the exact position of a small light beam on the sensor.
I found this, it looks like my guess is correkt:
http://letsmakerobots.com/node/37867
 

Offline BobbyK

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Re: What's this please? (Component Advice)
« Reply #922 on: February 22, 2016, 06:39:50 am »
Thanks for your answers. It seems like it is in fact some sort of position sensor. What would something like this be used in? I am assuming that for anything that wants to move across and get detected the travel would be very small. Any ideas where this might come from or be used?
 

Offline Richard Crowley

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Re: What's this please? (Component Advice)
« Reply #923 on: February 22, 2016, 06:55:02 am »
This is the kind of sensor you see used with a laser beam and X-Y servos where you can sense how far to the right or left you are from the beam, and how high or low.  And then re-position to center the beam in the mid-point of the sensors.  Or using a pin-hole beam from a sun-tracking system to follow the sun across the sky, etc.
 

Offline BobbyK

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Re: What's this please? (Component Advice)
« Reply #924 on: February 22, 2016, 07:00:04 am »
I love the idea for tracking the Sun Richard. I'll see if I can put something together with two of these to track on a vertical+horizontal axis. Might be a cool little project to maximize solar cell efficiency. I don't have any large panels, but it will be interesting to see if it's worth the power needed to run a small system. I am assuming that it is always worth it with large panels. Thanks everyone.
 


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