stanleyfx wrote: ↑Tue Dec 14, 2021 3:48 am
Frank wrote: ↑Mon Dec 13, 2021 4:02 pm
sebotron wrote: ↑Mon Dec 13, 2021 12:55 pm
Side note, hand soldering qfn is horrible. That is all
Flux. solder paste and hot air is the only way I will even attempt QFN.
Soldering iron? NOPE!
Yeah ! it took me a few attempts to get those to little QFN chips to solder correctly. I don't have solder paste so my process was flux on the PCB pads then tin all the pads by pulling the iron tip along a row while feeding solder in. More flux then place the QFN on the PCB then with a hot air gas iron to heat the chip and reflow the solder on the pads. Sometimes the QFN floats into position when the solder melts but other times it floated between pads/pins. Solder paste would be easier.
I'm just doing last checks on our PCB's before sending the gerbers off for prototype assembly.
Haha yes! I do have paste and a hot air gun - also just started to use no-lead paste and terrified I'm gonna burn the ICs
I figured my power issues: I designed my boards in Eagle, sent to fab, moved over to Diptrace and proceeded to rotate an eeprom on one board and a charge pump on another in the process so of course I soldered them upside down :facepalm:
Then I had I2C issues that took me a few days to figure out.
As we're speaking, I can talk to my eeprom and to my codec. Next stop is configuring the codec, slapping on the fxcore and hope for the best!