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April 10th, 2017, 3:52 pm
Roscoe Primrose wrote:
SoundMods wrote:The problem here is that Paul's device(s) has quad op-amps in a dual-inline-plug (DIP) format. The DIP format, even though it has the same pin-out as the surface-mounted devices, is much larger.
Adapters are available that you can solder the SMD to so it'll plug into the DIP socket....
True, I've done a lot of that. I have a lot of single and dual op amps that are either DIP or on DIP carriers. I may have some that are SIOP and not on DIP carriers. If you're looking for something let me know.
April 10th, 2017, 6:38 pm
That's cool! I guess there are adapters for everything.
April 10th, 2017, 7:07 pm
If anyone needs to borrow it, I have a Black Jack Solder Werks hot air reflow station that will do a good job with surface mount devices. Here is a link:https://www.circuitspecialists.com/bk4050.html
Instead of regular solder you use a solder paste like Zephpaste. Here is a link for that:http://www.zeph.com/zephpaste.htm
Using a soldering iron even with a very small tip can lead to bridges across the leads. The paste comes in a syringe and you lay a very small bead across the leads. When the reflow tip heats it up with air, it wicks between the leads and the board with no bridges across the leads.
April 11th, 2017, 6:57 pm
I've used the adapters from "Brown Dog" with great success. Also there are tutorials on Youtube about soldering surface mount stuff with a regular soldering iron. The secret is to put flux on the pins, place the part and tack one of the pins so the part won't move and then solder all of the pins on one side at once by laying the solder across all of the pins and swiping the iron across it away from the part. It works really well. I have just done little parts but on the videos there are people soldering huge parts using the same technique. I haven't had to do enough surface mount parts to invest in any equipment for them. I actually hate the little things.
April 11th, 2017, 6:59 pm
Soldering SMD with a regular (small, temperature controlled) iron isn't that bad, especially if you use the same paste you'd use with a rework station...
April 11th, 2017, 8:27 pm
I need to get some of this paste stuff. What I have always done is using a temp controlled iron with a tiny point melt a tiny blob of solder on one pad, then stick the component down with the iron, then with component stuck in place it's easy to hit the other pad/pads with iron and solder. I have sometimes used forsepts to hold parts down, or any other thing I can find that works.
The first few times were scary, nervous, tedious events, now it's a fun challenge
April 11th, 2017, 9:02 pm
That's what I used to do before I saw the Youtube videos, a much harder way to do it. Small diameter solder works really well soldering all the pins at once, try it. The challenge just goes away. I didn't like the challenge part as to many of those parts were expensive and I ruined more than one. John Dahlman told me once he just glued the things down before soldering them, not a bad idea.
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