my first soldering  - Page 1
Forum section: electronics / general

author: hussamaldean
author_rank: Unknown
timestamp: February 15, 2018, 12:15:51 pm
content: Hi all,I started soldering after I bought soldering station with hot air gun and I followed dave's video regarding the soldering and these are the resultsI want to hear your opinionsRegardsand thanks dave

author: wraper
author_rank: Unknown
timestamp: February 15, 2018, 12:32:09 pm
content: Looks good. However there are signs of overheat on tantalum capacitors. Especially on close to the edge of the board which is heavily discolored.

author: StillTrying
author_rank: Super Contributor
timestamp: February 15, 2018, 01:09:10 pm
content: "However there are signs of overheat on tantalum capacitors."I'm assuming the OP has soldered only the edge connector connections.Looks to me like the iron needs to be a bit hotter for the edge connector connections.I tend to increase the heata bitwhen soldering connectors because of the extra metal to be heated.

author: hussamaldean
author_rank: Unknown
timestamp: February 15, 2018, 01:21:29 pm
content: Quote from: wraper on February 15, 2018, 12:32:09 pmI don't think so because when I checked it was cleanQuote from: StillTrying on February 15, 2018, 01:09:10 pmI put the temperature 300 and worked fine350 was so bad

author: Terry01
author_rank: Frequent Contributor
timestamp: February 15, 2018, 01:30:09 pm
content: I would say a good job buddy! Awesome 1st attempt!If I was to be picky i'd say just a tad too much solder applied and maybe that is where the colour thing is coming from. We all do that though and it will fix itself with time and is not a problem. It's a good joint that has maybe 1/4 or 1/5 too much solder??? Hardly anything to complain about or pick out.To summarise....put about 0.0005 less of a milligram of solder on your joints and you'll be good!

author: hussamaldean
author_rank: Unknown
timestamp: February 15, 2018, 01:38:06 pm
content: Quote from: Terry01 on February 15, 2018, 01:30:09 pmthx and I will keep soldering until the solder station die

author: StillTrying
author_rank: Super Contributor
timestamp: February 15, 2018, 01:55:19 pm
content: Well something must be wrong, the joints "RD" and "GND" don't look right.

author: Terry01
author_rank: Frequent Contributor
timestamp: February 15, 2018, 02:01:47 pm
content: Quote from: StillTrying on February 15, 2018, 01:55:19 pmNot everything that "doesn't look right" has something wrong with it! Pot....kettle??

author: hussamaldean
author_rank: Unknown
timestamp: February 15, 2018, 03:01:04 pm
content: Quote from: StillTrying on February 15, 2018, 01:55:19 pmjust the angleeverything looks the same

author: Ampera
author_rank: Super Contributor
timestamp: February 15, 2018, 04:01:56 pm
content: Considering I've never been able to solder surface mount, good dang job.

author: wraper
author_rank: Unknown
timestamp: February 15, 2018, 04:09:29 pm
content: Quote from: hussamaldean on February 15, 2018, 01:21:29 pmWhat do you mean by "clean"? Capacitor itself became dark because of overheating.

author: StillTrying
author_rank: Super Contributor
timestamp: February 15, 2018, 04:09:57 pm
content: Quote from: hussamaldean on February 15, 2018, 03:01:04 pmDid you solder all the SMDs, or just the connector?

author: hussamaldean
author_rank: Unknown
timestamp: February 15, 2018, 05:01:54 pm
content: Quote from: StillTrying on February 15, 2018, 04:09:57 pmc'monI just learned tht soldering

author: wraper
author_rank: Unknown
timestamp: February 15, 2018, 07:32:23 pm
content: Quote from: hussamaldean on February 15, 2018, 05:01:54 pmYou mentioned hot air, so it was somewhat misleading. If you did not blast this board with hot air, then it was overheated crap from the beginning.

author: hussamaldean
author_rank: Unknown
timestamp: February 15, 2018, 07:52:20 pm
content: Quote from: wraper on February 15, 2018, 07:32:23 pm300 and high temperature ?I didn't use hot air gun

author: StillTrying
author_rank: Super Contributor
timestamp: February 15, 2018, 10:55:01 pm
content: Quote from: wraper on February 15, 2018, 07:32:23 pmYou have to read between the lines a bit.

author: wraper
author_rank: Unknown
timestamp: February 15, 2018, 11:28:40 pm
content: Quote from: hussamaldean on February 15, 2018, 07:52:20 pmAs I said in previous post, you bought crap board which was produced against proper reflow procedures.

author: TerraHertz
author_rank: Super Contributor
timestamp: February 17, 2018, 06:11:16 am
content: That brown tantalum might just be a different colored batch?Or maybe it's overheating due to electrical failure?hussamaldean, I too think the TH joints are fine, but better to use slightly less solder in future.Btw, you will find that fingernails long enough to grip small things are very useful in electronics. Also better for giving girlfriend backscratches.

author: hussamaldean
author_rank: Unknown
timestamp: February 17, 2018, 07:00:30 am
content: Quote from: TerraHertz on February 17, 2018, 06:11:16 amahabut I hate long nails and I don't have girlfriendSingle Phase and proud as I always say

author: wraper
author_rank: Unknown
timestamp: February 17, 2018, 05:50:39 pm
content: Quote from: TerraHertz on February 17, 2018, 06:11:16 amNo it's not. They never look like this unless overheated, moreover they obvoiusly are from the same batch. Cap on the bottom has only one of it's corners darkened. Either this board was reflowed in crappy IR oven with uneven heating or blasted with (too)hot air by hand.

author: hussamaldean
author_rank: Unknown
timestamp: February 17, 2018, 06:40:37 pm
content: Quote from: wraper on February 17, 2018, 05:50:39 pmit is cheap Chinese chip and I didn't use hot air

author: wraper
author_rank: Unknown
timestamp: February 17, 2018, 06:45:53 pm
content: Quote from: hussamaldean on February 17, 2018, 06:40:37 pmI already said that you bought a crappy board. If you think that all of such boards are assembled on decent production line, you are wrong. If it's low quantity assembly, it's could be manual or semi-manual process with using cheap equipment.

author: hussamaldean
author_rank: Unknown
timestamp: February 17, 2018, 06:51:26 pm
content: here is my second attempt

author: wraper
author_rank: Unknown
timestamp: February 17, 2018, 06:58:22 pm
content: Quote from: hussamaldean on February 17, 2018, 06:51:26 pmPretty good, much better than many people do after soldering for decades without ever learning how to solder properly.

author: hussamaldean
author_rank: Unknown
timestamp: February 17, 2018, 07:03:08 pm
content: Quote from: wraper on February 17, 2018, 06:58:22 pmyeah but this time I set the temperature to 350 rather than 300 and the results are much betterthx dave

author: tooki
author_rank: Super Contributor
timestamp: February 17, 2018, 10:58:40 pm
content: I’d say you’re off to a great start.As wraper said, many people have been doing far worse for years because they never learned right.Keep practicing, experimenting with various boards and components, before moving onto anything expensive! The soldering on the LCD looks great.What isn’t visible is how long it took to do each joint. Practice so that you can do a joint quickly, which puts less stress on the component and board than doing the joint slowly, or going back and fixing it repeatedly. Practice practice practice!

author: wraper
author_rank: Unknown
timestamp: February 17, 2018, 11:55:33 pm
content: Quote from: hussamaldean on February 17, 2018, 07:03:08 pmIIRC Dave's video about soldering was informative but not the best. You could look for soldering videos from John Gammell for more professional job.https://www.youtube.com/user/jkgamm041/videos