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What are these?

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(@witchdoc59)
Member
Joined: 2 years ago
Posts: 22
Topic starter  

So I was given some electronics recently and in the box was a bag of these things.   Some kind of circuit board.   Would anyone recognize them and know what they are?

boards

Also I would like to know what the white connector is called in this picture.  I'd like to get a kit of them if anyone knows the name of them.

20230408 172322

 All and any comments/suggestions are greatly appreciated.


   
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Ron
 Ron
(@zander)
Father of a miniature Wookie
Joined: 4 years ago
Posts: 7402
 

@ witchdoc59 If you take close-up pictures of the PCBs so we can read the numbers on the boards, we can help. Could you check both sides? It looks like four different kinds. I can't quite make out the connector either, but someone else might take better pictures perpendicular to the surfaces.

They might be these https://amz.run/6Yqm

First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.


   
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(@witchdoc59)
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Joined: 2 years ago
Posts: 22
Topic starter  

The board to the lower left says, Ver:1.1 at the top and at the bottom it says, SSOP4-28Pin 0.65MM.

The board pictured above that one says, SOP20Pin at the top, in the middle there is 22981A and at the bottom it says 1.27MM

The large board at the top right, looks like it might hold a CPU of some kind.  The writing on this is TQFP(32-100Pin), 0.5MM

Finally the little boards at the lower right say, V1.0 at the top, SSOP16, 0.65MM 

On all of the boards the holes are numbered.  And the reverse side is a duplicate of the front side.

 

 


   
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Will
 Will
(@will)
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Joined: 3 years ago
Posts: 2552
 

@witchdoc59

Judging from the patterns, they appear to be converters that allow you to solder an SMD chip onto the PCB and expand the legs out to soldered headers around the outside.

Anything seems possible when you don't know what you're talking about.


   
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Ron
 Ron
(@zander)
Father of a miniature Wookie
Joined: 4 years ago
Posts: 7402
 

@will @witchdoc59 Yep, SOP to DIP, I have a smaller version. Highly unlikely you will ever have a use for them but put them in a baggy and put them aside in case that ever changes. You do need special tools to work with them although some get by with an old iron or an oven, just have to pull it out at the right time before the heat ruins the little chips. I will attempt to mount my SMD using a special paste and a hot air gun.

On Amazon https://amz.run/6YrI

eBay https://www.ebay.com/itm/223679410861

Amazon https://amz.run/6YrJ

And the big one is for a Thin Quad Flat Pack, hence the TQFP part number.

 

 

First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.


   
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(@davee)
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Joined: 3 years ago
Posts: 1794
 

Hi @witchdoc59,

  As already identified, the PCBs are adapters to enable surface mount parts to be used with 0.1 inch (2.54mm) through hole mounting boards, which can be either matrix boards or the "push wires" type. Clearly, the surface mount devices need to be soldered to the boards, and there are lots of YouTube videos available showing techniques for soldering surface mount parts, albeit some are much better than others.

The connector is difficult to identify, but at first glance it looks to be similar to the "XH" type, but there are others with similarly obscure names like "PH".

You need to measure the pitch between the pins .. it might be 0.1 inch (2.54mm), 0.05 inch (1.27mm) or it could be a metric pitch like 1mm, 1.5mm or 2mm.

e.g. https://www.aliexpress.com/item/4000029789756.html

For the connectors, and also to see some of the other adapter boards, I suggest you do a bit of searching on AliExpress, as many of the more readily available products originate from that part of the World, and this is a place to gain some familiarity.

Of course, you may prefer to purchase from local suppliers, Amazon , or the 'trade' suppliers  like Mouser, Digi-Key, Farnell, etc., once you have identified the products you are interested in.

Best wishes, Dave


   
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