Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Results 1 to 9 of 9
  1. #1

    Member Sales Rating: (10)

    Join Date
    May 2007
    Location
    Colorado
    Posts
    1,217

    Default Seriously Newb question about soldering

    I got the BR-1 speaker kit from Parts Express to put together with my son (age 9), because he likes anything with wires and I thought he would love to do something with a circuit board that actually works. As it is, he takes apart toys like RC trucks, etc and is fascinated by the PCBs, wires them up all funky and keeps asking me, "Dad, do you think it will work?" I tell him that you have to understand the circuit in order to make it "work", but he is undeterred. So, anyway, the instructions with the speaker kit gives good instructions on what to do, but not enough detailed instruction on exactly how to do it, and I don't want to screw up the PCB, not having soldered on one before.

    So, the "front" of the board has the layout of all the components printed on it, with the little holes for the corresponding wires to go through. I plan to use hot glue to attach the components on the front, with the full length wires sticking through to the "back". Once that is secured and turned over, there are little copper circles which I am thinking is where the wire will be soldered/connected.

    First question, should I leave the wires from the components full length until soldered, then trim, or trim to a shorter length before soldering?

    Next question, do I need to prep the wires or the circuit board in any way to make the solder "stick" properly? The instructions that came with the soldering gun say to "clean" the parts to be soldered thoroughly. I'm familiar with that when sweating plumbing joints, but I don't want to overdo it with this small/fine stuff.

    Next question, do I use the soldering iron to heat the little copper circle and just touch the solder to it to melt it, or will that damage the PCB? Or do I melt the solder with the hot tip and let it "drip" onto the connection? Do I need to use a heat sink clamp between the joint and the component, or is this process quick/cool enough that it won't endanger the component?

    I think that is all the questions I have for now, but if you gurus who do this a lot have any other tips to make it work smoothly, I would really appreciate it. Thanks in advance!
    Attached Images  
    Last edited by seeclear; 03-21-2010 at 11:22 AM.

  2. #2

    Member Sales Rating: (26)

    Join Date
    Oct 2006
    Location
    The tube lair in Charlotte, NC
    Posts
    11,323

    Default

    Hello, maybe I can help. I personally would not worry about using hot glue to place the components on the board first, but that's just me. Making sure the soldering iron is hot enough to make a good solder joint, I would install the component and solder one side at a time leaving only what is necessary to come out of the other side of the board. As quickly as you can, heat up the wire leading through and dab solder on the wire until the hole completely fills up [without moving the component]. Quickly remove the soldering gun and repeat this process until the other side of the component is installed. Then move on to your next component until the board is done.

    I take it that you have the appropriate tools to get this done correctly?
    In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

    The best way to enjoy digital music reproduction is to never listen to good analogue reproduction.

  3. #3

    Member Sales Rating: (26)

    Join Date
    Oct 2006
    Location
    The tube lair in Charlotte, NC
    Posts
    11,323

    Default





    You want each solder connection to look like ^^^this^^^ ideally. What you don't want is a cold solder joint as shown below.

    In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

    The best way to enjoy digital music reproduction is to never listen to good analogue reproduction.

  4. #4

    Member Sales Rating: (10)

    Join Date
    May 2007
    Location
    Colorado
    Posts
    1,217

    Default

    Thanks, Tom, that is very helpful.

  5. #5

    Member Sales Rating: (26)

    Join Date
    Oct 2006
    Location
    The tube lair in Charlotte, NC
    Posts
    11,323

    Default

    You are welcome. If you have any other questions, don't hesitate to ask. Have fun!
    In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

    The best way to enjoy digital music reproduction is to never listen to good analogue reproduction.

  6. #6

    Member Sales Rating: (1)

    Join Date
    Jan 2008
    Posts
    1,180

    Default

    Quote Originally Posted by seeclear View Post
    1) First question, should I leave the wires from the components full length until soldered, then trim, or trim to a shorter length before soldering?

    2) Next question, do I need to prep the wires or the circuit board in any way to make the solder "stick" properly? The instructions that came with the soldering gun say to "clean" the parts to be soldered thoroughly. I'm familiar with that when sweating plumbing joints, but I don't want to overdo it with this small/fine stuff.

    3) Next question, do I use the soldering iron to heat the little copper circle and just touch the solder to it to melt it, or will that damage the PCB?

    4) Or do I melt the solder with the hot tip and let it "drip" onto the connection? Do I need to use a heat sink clamp between the joint and the component, or is this process quick/cool enough that it won't endanger the component?
    1) full length and then trim once soldered
    2) new components are pretty clean, but I've learned to either sand down old dull leads or even wipe with alcohol. Also a good idea to use a toothbrush and clean up a joint after soldering. That core of rosin has a habit of eating away at joints, over a long time.
    3)yes, heat both parts with the iron and then touch the solder to both parts without the solder touching the iron directly. As you learned in plumbing, if the metal is hot enough, the solder will get there. It will climb metal to cover the hot spot.
    4)no

    A typical joint should have the iron touching for 2-5 seconds. I personally solder one leg of a resistor and then move onto another component. Let the resistor cool down before soldering the second leg. It's not mandatory, but I like to play it safe.

  7. #7

    Member Sales Rating: (11)

    Join Date
    Jan 2006
    Location
    Toronto, ON, Canada
    Posts
    2,019

    Default

    Look in Section 6:

    http://workmanship.nasa.gov/lib/insp.../frameset.html

    This is NASA Workmanship Pictorial Reference for soldering, wiring and everything else. The best picture reference I have ever seen.
    Panasonic PT-AE4000U projector for movies
    EluneVision 92" Cinema Gray fixed screen
    Onkyo TX-SR805 Pre/Pro
    Rotel RMB-1075 Amp
    B&W CDM1-SE fronts
    B&W CDM-CNT center
    B&W CDM1 rears
    Samsung DTB-H260F OTA HDTV tuner
    DUAL NHT SubTwo subwoofers
    Velodyne SMS-1
    Oppo BDP-93 Blu-Ray player
    Belkin PF60 Power Center
    Harmony 890 RF remote
    Panasonic TC-P50G20 TV + PS3 in the living room

  8. #8

    Member Sales Rating: (0)

    Join Date
    Oct 2009
    Posts
    5

    Default

    [QUOTE=seeclear;1304707]
    First question, should I leave the wires from the components full length until soldered, then trim, or trim to a shorter length before soldering?

    >>With leaded components and backside soldering I like to install several while bending the leads over so they stay in, then solder in batches, then trim the leads off.

    Next question, do I need to prep the wires or the circuit board in any way to make the solder "stick" properly? The instructions that came with the soldering gun say to "clean" the parts to be soldered thoroughly. I'm familiar with that when sweating plumbing joints, but I don't want to overdo it with this small/fine stuff.

    >>If the circuit board is bare copper you should pre-tin it. It doesn't hurt to clean the leads, especially if they appear dirty. A quick swipe with steel wool works well too, just do that away from the board so no wool fragments end up on the board.

    Next question, do I use the soldering iron to heat the little copper circle and just touch the solder to it to melt it, or will that damage the PCB? Or do I melt the solder with the hot tip and let it "drip" onto the connection? Do I need to use a heat sink clamp between the joint and the component, or is this process quick/cool enough that it won't endanger the component?

    >>A variable temperature iron is best for this. It's worth the extra cost. The heat (watts) is proportional to the amount of metal you're heating. Yes, heat the circular copper pad (about a second at 6-700 watts for something that size) and touch the solder elsewhere on the pad for just an instant. If you overapply the solder, slurp it off with some solder wick. A good solder joint should not have bulges or bubbles of solder. It should hug whatever you're soldering pretty tightly.

  9. #9

    Member Sales Rating: (28)

    Join Date
    Mar 2005
    Location
    Right here.
    Posts
    10,414

    Default

    I found these videos very helpful.

    http://www.tangentsoft.net/elec/movies/
    _________________________________________________
    ***\\\\\........................... My Audio Journey ............................./////***

    2008 & 2010 Football Pool WINNER
    SOPA

    Thank God for different opinions. Imagine the world if we all wanted the same woman

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. tsi 400 basic/newb question...
    By thecyclops in forum Basic Hookup/Wiring Questions
    Replies: 0
    Last Post: 10-17-2009, 05:32 PM
  2. Newb question about impedence.
    By bykes in forum Speakers
    Replies: 31
    Last Post: 08-06-2007, 10:04 AM
  3. Newb Question about 1.2s
    By sambandit in forum Vintage Speakers
    Replies: 17
    Last Post: 04-09-2006, 05:14 PM
  4. newb question
    By ebarrons in forum Speakers
    Replies: 21
    Last Post: 04-09-2004, 09:10 PM
  5. newb question
    By Airplay355 in forum Speakers
    Replies: 11
    Last Post: 05-13-2003, 09:52 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts