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Topic: Having a hard time soldering 7 segments displays (Read 847 times) previous topic - next topic

Rookie2

Apr 11, 2013, 07:50 am Last Edit: Apr 11, 2013, 08:14 am by Rookie2 Reason: 1
I'm trying to multiplex some 7-segments displays, got the diagram and the components, then mounted the displays over a perforated board and tried to wire the common segments.
The result was a total mess. I really sucks doing this and there is no enough space between as for i can put the solder there and make a decent work.
After a couple days I just gave up.

So, i wonder what to do now, I heard about the breadboards but i'm not sure if I understand how they work, I guess they are meant just to test stuff ?¿
To design and create a PCB would be the obvious answer I guess, but that seems out of my scope for now.
Please I need some advice, as i'm really lost atm.

Thanks in advance.

dc42

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fungus


The result was a total mess. I really sucks doing this and there is no enough space between as for i can put the solder there and make a decent work.


What soldering iron are you using? Perfboard is easy with a fine tip iron.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

Rookie2

#3
Apr 11, 2013, 07:31 pm Last Edit: Apr 11, 2013, 07:34 pm by Rookie2 Reason: 1

I'd use IC sockets and a wiring pen for that. See http://www.verotl.com/en/category/Wiring%20Systems and http://info.ee.surrey.ac.uk/Workshop/advice/grotwire/.


Interesting, will check if I can get the materials here.


What soldering iron are you using? Perfboard is easy with a fine tip iron.



A 40W one


fungus

A "firestick"...

40W is far too much for this sort of work. High chance of damaging components and the tips don't stay pointy for very long.
.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

Rookie2

I see, how much power would be adequate for this task?

JoeN

#6
Apr 11, 2013, 08:40 pm Last Edit: Aug 25, 2014, 01:20 am by JoeN Reason: 1
There are many ways to do this but this is how I do 7-segments on a perfboard.  

1.  Solder down displays.
2.  Run wire to adjacent hole to where I want to make the connection.
3.  Bend over wire, bind connection in solder.

It's really quite easy.





I have only come here seeking knowledge. Things they would not teach me of in college.

dc42


A "firestick"...

40W is far too much for this sort of work. High chance of damaging components and the tips don't stay pointy for very long.


A 40W temperature-controlled iron, set to an appropriate temperature, would be fine.
Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

Boardburner2

Yes , temp control is a must in my opinion.

fungus

#9
Apr 12, 2013, 08:03 am Last Edit: Apr 12, 2013, 08:06 am by fungus Reason: 1

A 40W temperature-controlled iron, set to an appropriate temperature, would be fine.


With temperature control, sure, 40W is good because it gets up to temperature very fast.

OTOH, would you use your temperature controlled iron at full power for everyday work?

I own 16W and 25W irons. The 16W has a very fine tip and works great for really small stuff. The 25W is good for more general work.

The reason I have two is historic. If I was going out to buy one today I'd buy a temperature controlled one.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

dc42

Around 35 years ago I used 18W and 25W uncontrolled irons, and I was very happy with them (I built a computer using them). In those days, temperature controlled irons were an expensive luxury. But temperature controlled irons are are now inexpensive. The temperature control is especially valuable if you have to (or want to) use lead-free solder.
Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

Boardburner2

Whatever the power , for a given temperature and job the average power consumption will be about the same,
higher power just heats faster.
I prefer 60W.
It is useful sometimes where I have to solder power components to large areas of copper used as heatsink.

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