Go Down

Topic: What is the most challanging device that you have successfully soldered? (Read 1 time) previous topic - next topic

JoeN


Mine was an LGA-14 (analog accelerometer). Bought them for fun because they were very cheap. Second try I managed to get it soldered on a home-etched board but it started smoking after about 10 minutes because of (I assume) some leftover flux under it.


Hmmm, Sparkfun still selling them

https://www.sparkfun.com/products/9605

Samples are still available, but Freescale doesn't recommend them in new designs for some reason.   :smiley-eek:

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MMA7361LC&tab=Buy_Parametric_Tab&nodeId=01126911184209&pspll=1&fromSearch=false
I have only come here seeking knowledge. Things they would not teach me of in college.

Grumpy_Mike

Quote
but Freescale doesn't recommend them in new designs for some reason

They say that when they are stopping, or have stopped, making the part, it is called going obsolete.

Constantin

32 TQFP, but in a 5mm x 5mm format. Leaves 0.5mm pitch per pin and even with a stencil that is a PITA!!!

Reason being that unless you have just the right type and amount of solder paste, there is so little solder mask between pins to prevent shorts. And when you try to clean up accidental solder bridges with anything but a robotic helper and a giant magnifying glass, you have the joy of observing pins wandering from pad to pad as you brush them with your soldering iron when you try to suck up / drag solder the excess away. Thanks but no thanks, I am never touching those types of chips again, if I can help it.


JoeN


my finger

not just burned but accidentally soldered a smd resistor to it


Did you use flux or not?
I have only come here seeking knowledge. Things they would not teach me of in college.

Go Up