soldering

QFN64 Hand Soldering with hot air gun

Submitted by fabio on Fri, 2012-07-20 09:33.

I've recently had to hand solder a QFN64 package chip (CC430 microcontroller) on a PCB for a project. This was the first time I soldered a QFN this big, it turned out quite well.

I recorded the process in the following video:

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Soldering Saturday (NFC PN532 Breakout board)

Submitted by fabio on Mon, 2012-06-04 20:42.

The past Saturday me and Franco met up at Fablab Torino to solder the PN532 NFC/RFID breakout board from Adafruit/Microbuilder. This should be a pretty good learning platform to dig into NFC/RFID.. stay tuned for more on this...

Btw, Franco had the nice idea of making a timelapse of the day.. here it is.. almost 6 hours of bloody soldering!

Result? Well, the chip communicates fine with Arduino but it still didn't recognize any RFID tag: I found out that the RF inductors were completely wrong (ordered a different part), so I hope that once I get them it will work. Stay tuned ;-)

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QFN rework & reflow using hot air

Submitted by fabio on Tue, 2011-06-14 23:43.

This is myself reworking and reflowing a breakout board for the ITG3200. I use hotair gun and tack flux. Check it out!

p.s.: obviously inspired by this other video by curiousinventor.com, highly recommended.

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Never trust your solder joints

Submitted by fabio on Thu, 2011-05-05 15:18.

No matter how you carefully check your hand soldered parts and how you test your soldered PCBs for correctness.. shit will happen.

FreeIMU bad soldering on the PCA9306

This is a magnified picture of the PCA9306 contained on a FreeIMU v0.3 sent to one of FreeIMU testers.. as you can see the right pin has desoldered from the PCB. Of course, the board have been carefully visually checked and tested by myself before shipping, however, sometimes bad soldering is just undetectable.

I guess this joint disconnected during shipping as the board worked without problems in all my tests before shipping.