Soldering: Building my Logic Analyzer, Revision 1

This video is an 8x speed view of video I took while soldering components to a circuit board I designed.
I'm still improving my technique for this, I promise future videos will be far more interesting to watch :)

This board consists mainly of a QFN USB interface chip, and a big TQFP FPGA chip, the rest is mostly some regulators, passives, connectors and a clock source. The device doesn't work yet, I still need to design the firmware for the FPGA and drivers, but it should be pretty nice when I'm done!

Anyway, I made a bad alignment mistake on the first board (not shown in this video), so I will have to try to rework it further or it will be useless. Always check chip alignment thoroughly after tacking down the corners, but before soldering the pins, otherwise you can easily wind up with a strip of pins that are all connected together (and oh so little hope of fixing it without good tools).

I'm making this video available in case anyone is interested in seeing how this sort of thing works, I'd love to hear feedback though, on what's interesting and what isn't.

Category:

Science & Technology

Tags:

• soldering
• pcb
• tqfp
• surface mount
• SMT
• electronics
• assembly
• QFN
• SOIC

[ultraveburas]

I tried soldering my usb female back on to my external hard drive but only manage to make little balls. the solder metal that you touch to the soldering tool turns into a hard metal instantly after it touches the heat. I can't figure out how you guys are doing this, is it the solder metal I got or something? I manage to get the part to stay on but i thing the min prong things that actually reads the data may be soldered on wrong, i can't seem to do it right, is there any tips you can give me?