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Topic: Smd component soldering  (Read 3591 times) previous topic - next topic

Grumpy_Mike

#15
Jan 24, 2016, 05:42 pm Last Edit: Jan 24, 2016, 05:44 pm by Grumpy_Mike
This is the smallest thing I have ever hand soldered. It is a bicoloured LED, with a connection in each corner.
As you can see it mounts between the tracks in strip board.





The lighting up is purely from the current from the resistance setting of a DVM.  

Marciokoko

GrumpyMike,

On 9024 image, each track is a long flat copper surface, basically a nice long flat wire?

The rectangles with numbers on them are the resistors whereas the 2-top-left and 2-bottom-left and the 34 top-right and 3-bottom-right slightly longer rectangles are transistors?

larryd

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If you are asked for more information, please supply it.
If you need clarification, ask for help.

Grumpy_Mike

#18
Jan 24, 2016, 08:06 pm Last Edit: Jan 24, 2016, 08:06 pm by Grumpy_Mike
On 9024 image, each track is a long flat copper surface, basically a nice long flat wire?
I think you mean the other one.
Yes strip board has tracks with holes every 0.1".

Here is the diagram I made it from, I hope you can relate the two.

larryd

Mike, what program did you use for the image/design in the above post?
.
No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

Grumpy_Mike

#20
Jan 24, 2016, 08:20 pm Last Edit: Jan 24, 2016, 08:21 pm by Grumpy_Mike
Roadrunner offers a solderable enamel wire for single type, prototyping boards.
Verowire is an almost identical system and there is a lot of stuff if you search for it.

I use it with surface mount resistors and capacitors, as shown here.


Quote
what program did you use for the image/design in the above post?
It is called MacDraft, it is just a general purpose 2D drawing package.

Marciokoko

#21
Jan 24, 2016, 08:31 pm Last Edit: Jan 24, 2016, 08:34 pm by Marciokoko
Wow!  I'm going crazy taking apart old stuff.
Now that I know what they are.  I wish I would have kept the optocoupler from an old Wall wart I threw away a few days ago.


larryd

Quote
It is called MacDraf

Thank you.
No technical PMs.
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If you are asked for more information, please supply it.
If you need clarification, ask for help.

Boardburner2

Great stuff guys.  just a few more questions:

1.  If I buy a board like this, I can't really cut it up to use parts of it, right?  Boards themselves are kind of brittle.



Strip board is normally paper phenolic, it is brittle, but pad board can be had in epoxy which is not, but difficult to cut.

I use a board shear which is easy but they are costly.

Marciokoko

#24
Jan 24, 2016, 09:28 pm Last Edit: Jan 24, 2016, 09:45 pm by Marciokoko Reason: images
I'm trying to post images of what I have.


What are those 2 ICs of which one is labeled U2?  This is a small pcb from a battery-solar panel combination:


TL431 seems to be a shunt regulator.  I thought this was a transistor at first because they look like a transistor.  But I have been noticing that lots of things look like transistors :-)



These black rectangles without letters are the transistors, right?  Is there any way to find out what kind they are?  I guess for R its just a matter of reading the letters on top of them:

Boardburner2

#25
Jan 24, 2016, 09:54 pm Last Edit: Jan 24, 2016, 09:55 pm by Boardburner2
Quite possibly, its fairly common to see small smd without marking as there is not much room.

Even ic's can have no markings or have no traceable no's on the net.

If you need transistors they are cheap and not worth salvaging generally.

If you are a beginner though , nothing wrong with trying to identify components.


TL431 seems to be a shunt regulator. 

Its a precision voltage reference

Marciokoko

Well the optocoupler would've been cool!

Boardburner2

TL431

Being through hole that's definitely salvageable and useful.

Sm generally not so much.
Small components are generally very cheap.

Marciokoko

GrumpyMike, so in post #18, when a rail connects two components and you want to use the rest of the rail for something else, you strip off the copper?  Is that what the greyed out square shapes are?


Marciokoko

From post #24, what could those 2 small ICS be?

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