Author Topic: What's this please? (Component Advice)  (Read 370838 times)

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Offline jitter

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Re: What's this please? (Component Advice)
« Reply #1300 on: April 11, 2018, 02:28:00 pm »
I'm trying to find some information about the following connectors.

This is the male header:


This is the mating female connector:


It is 15 pins. The pin pitch, as accurately as I could measure, appears to be 3mm. Both are through-hole mounted. The vertically-oriented male connector is approximately 32x12mm.

I've done a bit of searching but I've not found anything yet. I'm not even sure how you would classify this kind of connector. Board-to-board? Backplane? I'm specifically looking for the female mating connector, in either right-angle (as pictured) or vertical mounting.

Even though they are no exact match (but maybe you can start looking from there), they seem somewhat similar to the Amphenol Type 57.
 

Offline HwAoRrDk

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Re: What's this please? (Component Advice)
« Reply #1301 on: April 11, 2018, 11:52:01 pm »
Even though they are no exact match (but maybe you can start looking from there), they seem somewhat similar to the Amphenol Type 57.

Thanks. At least I have another term to try searching for: "micro ribbon". Although at ~3mm pitch, I don't think these quite classify as 'micro'.

I found something similar, the Molex 'Zyton' 87436 board-to-board series, but they are 1mm pitch (and also obsoleted).

The device these are on is a Japanese piece of audio equipment (for an optional module), and also features a Hirose connector elsewhere, so I trawled through a number of Japanese manufacturers - Hirose, JST, JAE, Sumitomo, Yazaki, Panasonic - but with no luck. :(
 

Offline Cyberdragon

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Re: What's this please? (Component Advice)
« Reply #1302 on: April 12, 2018, 10:28:04 am »
I inherited a bunch of discrete components from my father in law recently. Many very interesting bits from the 50’s and 60’s (I think) that are in superb condition, but this set of semi-conductors (I assume they are) has me flummoxed! Does anybody have any idea what they are?

They look like a two-lead TO-92 package with color code bars on both sides. There is nothing printed on the top or bottom. I’ve put 750v dc across them and they won’t blow or conduct any current.

Thoughts?

I hope you meant 750mV not 750V, otherwise you vaporized them.

They're probably varactor diodes.
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Offline GomezAddams

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Re: What's this please? (Component Advice)
« Reply #1303 on: April 12, 2018, 12:45:05 pm »
You must be correct. I set up a test rig where I could reverse bias these with a variable voltage and an inductor (wikipedia helps a lot) and they've got a significant range of variable capacitance. Putting other normal diodes into this circuit also shows a variable capacitance, but it's much, much smaller.

When I got here I knew nothing about varactor diodes, and now I at least know what they are, how they're made, and (partially) why they're used. Thanks!!
 

Online frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1304 on: April 15, 2018, 11:00:46 pm »
This device was put in a box on the sidewalk to be picked up for free.
I am clueless as to what exactly this is designed to do.
Any suggestions?

AC input voltage goes through some filtering (cap and inductor) and into a relay. Seems like the relay is switched externally through voltage applied to one of those old speaker connectors (o|).
There are a bunch of 100k pots and a BC107A NPN transistor per 'channel', presumably driving the MOSFETS (?) on the output (TO-220, labeled Malaysia TTCI06D).

The PCB reads "FZA ELMSHORN EL7567A2 LB1"
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Offline madires

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Re: What's this please? (Component Advice)
« Reply #1305 on: April 15, 2018, 11:22:51 pm »
Presumably a classic disco light. The TO220 parts are thyristors/SCRs.
 
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Online PA0PBZ

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Re: What's this please? (Component Advice)
« Reply #1306 on: April 15, 2018, 11:25:41 pm »
This device was put in a box on the sidewalk to be picked up for free.
I am clueless as to what exactly this is designed to do.
Any suggestions?

A 'light organ'?
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Offline HwAoRrDk

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Re: What's this please? (Component Advice)
« Reply #1307 on: April 16, 2018, 03:41:09 am »
I'm trying to find some information about the following connectors.

...

It is 15 pins. The pin pitch, as accurately as I could measure, appears to be 3mm. Both are through-hole mounted. The vertically-oriented male connector is approximately 32x12mm.

I've done a bit of searching but I've not found anything yet. I'm not even sure how you would classify this kind of connector. Board-to-board? Backplane? I'm specifically looking for the female mating connector, in either right-angle (as pictured) or vertical mounting.

I'm still not having any luck trying to track down this thing. :( I did find some better pictures of it, though:



Unfortunately, they were on an archived copy of some long-defunct (from 2008) German website about some guy's personal electronic project to make his own expansion module, so no further information forthcoming from that avenue unfortunately.

I have a feeling this might actually be a Panasonic part, because I did a Google image searching for similar images and found something claiming it was a spare part used for some range of Panasonic equipment (although the device I have with the other mating half is not made by Panasonic). But I think that might be a dead-end, as the part number given seems to be a Panasonic-specific reference (much in the same vein as HP did with other manufacturers chips), and not the actual manufacturer's.

Does anyone know if Panasonic do, or did, make connectors like these? All I can find presently are that they make a small range of tiny-pitch board-to-board/mezzanine connectors.
 

Online frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1308 on: April 16, 2018, 04:49:26 am »
Presumably a classic disco light. The TO220 parts are thyristors/SCRs.

That was my initial thought, however there is no sound-to-light circuitry. The input can only switch on/off the main relay. Also, FZA Elmshorn was a division of Deutsche Post that was in charge of all the hardware for telecommunication in Germany back in the day.
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Online PA0PBZ

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Re: What's this please? (Component Advice)
« Reply #1309 on: April 16, 2018, 05:21:28 am »
... however there is no sound-to-light circuitry.

I see triacs and some kind of filters around the BC107's
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Online frozenfrogz

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Re: What's this please? (Component Advice)
« Reply #1310 on: April 16, 2018, 05:45:52 am »
... however there is no sound-to-light circuitry.
I see triacs and some kind of filters around the BC107's

My bad!
I had mistaken the black block for a relay, but it seems to be an input transformer with a ratio of 1:5.
So it is a "light organ" after all :)
FZA Elmshorn really threw me off here...
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Offline AE7OO

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Re: What's this please? (Component Advice)
« Reply #1311 on: April 23, 2018, 07:58:36 pm »
Hello,

I'm trying to figure out what this is.  I've tried google under just about every variant I could imagine, but no luck.

It is a blue and white cylinder, has 4 leads(1 and 3), and is marked DEG(maybe OEG), backwards UR(UL listed) and 250 ohms.

Thanks,
GB
 

Online PA0PBZ

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Re: What's this please? (Component Advice)
« Reply #1312 on: April 23, 2018, 08:01:38 pm »
2 leads or 4 leads? If only 2 then a wire wound 250 ohm resistor, if 4 my guess is a reed relay.
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Offline CJay

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Re: What's this please? (Component Advice)
« Reply #1313 on: April 23, 2018, 08:08:17 pm »
2 leads or 4 leads? If only 2 then a wire wound 250 ohm resistor, if 4 my guess is a reed relay.

Reed Relay, I'm almost 100% sure of that.
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Online PA0PBZ

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Re: What's this please? (Component Advice)
« Reply #1314 on: April 23, 2018, 08:25:05 pm »
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Offline AE7OO

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Re: What's this please? (Component Advice)
« Reply #1315 on: April 24, 2018, 12:02:54 am »
Thank you!

Yes, it has 4 leads(as mentioned in the request..:)).

Hum...  Got to figure out what I can use it for.  It has been the in junk drawer for years...

GB
 

Offline Gregg

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Re: What's this please? (Component Advice)
« Reply #1316 on: April 24, 2018, 05:39:35 am »
It could be a reed relay inside a coil.  The 250 ohms may be the coil impedance
 

Offline CJay

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Re: What's this please? (Component Advice)
« Reply #1317 on: April 24, 2018, 06:48:04 pm »
Thank you!

Yes, it has 4 leads(as mentioned in the request..:)).

Hum...  Got to figure out what I can use it for.  It has been the in junk drawer for years...

GB

Lots of uses for a reed relay, they excel at low level signal switching (I'm aware there are possibly other, better options now which is why they fell out of favour) they're usually highly reliable as well.

They're not much use as a general purpose relay as they can usually only handle low current but if you need a reed relay, then it's hard to find a substitute.
M0UAW
 
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Offline TerraHertz

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Re: What's this please? (Component Advice)
« Reply #1318 on: April 25, 2018, 12:11:02 pm »
I'm tracing out the circuit of a backlight inverter of an LCD display. Found most of the datasheets needed, but as usual I can't find data on a few SOT-23 parts, because the numbers are too short and cryptic. These ones:

D_A7W53.png     dual diode SOT-23
D_S44B.png      diode
Q_7KvCZ.png     transistor SOT-23
Q_t064d.png     transistor SOT-23
Q_W0451.png     transistor SOT-23

More generally, how do you look these things up anyway? I'd rather not need to ask for help with trivia like this again.

Edit. Found:
 A7W    (it's a BAV99)
 7KvCZ   http://www.s-manuals.com/smd/7k - 2N7002K   N-Channel MOSFET
 W04    http://www.s-manuals.com/smd/w0   a 2N3904 equiv. Probably

This is useful: http://www.s-manuals.com/smd/xx  - replace 'xx' with initial two alpha-num code on component. Or just start here: http://www.s-manuals.com/smd/
« Last Edit: April 25, 2018, 02:28:09 pm by TerraHertz »
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Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1319 on: April 25, 2018, 03:02:36 pm »
S4 SS14 Surface Mount Schottky Barrier Rectifier

https://www.vishay.com/docs/88746/ss12.pdf

*O6 PMBS3906 PNP general purpose transistor

https://assets.nexperia.com/documents/data-sheet/PMBS3906.pdf
« Last Edit: April 25, 2018, 03:05:54 pm by gamalot »
 
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Offline TerraHertz

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Re: What's this please? (Component Advice)
« Reply #1320 on: April 25, 2018, 08:06:00 pm »
S4 SS14 Surface Mount Schottky Barrier Rectifier
https://www.vishay.com/docs/88746/ss12.pdf

Not quite. The one on this PCB has dimensions (plastic body) of 4.3 x 3.5mm. Bigger than the one above.
But, doesn't matter. I'm going to just assume it's a schottky. Don't need to know exact characteristics.

Doing this because I want to use the panel as a small light table. Street-tossed PC LCD monitor. I've removed the LCD glass, leaving the backlights & diffuser. Two PCBs, one has all the power supply stuff, the other is the video control board (to be discarded.) There are two signals to the backlight inverter. One is a simple analog brightness control. The other is... something. I think some kind of CPU-alive active signal, without which the backlight won't run. The inverter control IC doesn't have any control data input, so it's an analog thing via discretes.
So, enough tracing to see what the inverter wants on that line. Or rather, how to hack it to not want anything there.
I'm about half done with the circuit.

Ha ha, I didn't even look at it with a scope yet. Would rather see the circuit first.
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Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1321 on: April 25, 2018, 08:25:21 pm »
4.3 x 3.5mm shuold be the SMB package.  :)
 

Offline tautech

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Re: What's this please? (Component Advice)
« Reply #1322 on: April 25, 2018, 08:39:51 pm »
4.3 x 3.5mm shuold be the SMB package.  :)
And that's the key to finding info about SMD components, correctly identify the package first.  :-+

I use something like:
Google
SMD marking XYZ 'package' data pdf

Generally you find what you're looking for but sometimes need to refer to the several online SMD guides.
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Offline TerraHertz

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Re: What's this please? (Component Advice)
« Reply #1323 on: April 25, 2018, 09:29:33 pm »
...  but sometimes need to refer to the several online SMD guides.

You don't happen to have a list of links to the guides you use, that you could post?
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Offline tautech

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Re: What's this please? (Component Advice)
« Reply #1324 on: April 26, 2018, 06:01:40 am »
...  but sometimes need to refer to the several online SMD guides.

You don't happen to have a list of links to the guides you use, that you could post?
None in particular but some you can save for local use and others work online.
Just Google 'smd codebook' and there's a heap to try and sort through 'till you find the 'flavor' you like.
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