Electronics Forum | Wed Nov 20 12:10:29 EST 2019 | rossrohrer1
Trying to create my own RFID reader based off the MFRC522 demo board by copying the layout and components, then later i am planning to change the footprint. I am having trouble replicating their crystal. The mfrc522 datasheet calls for a 27.12 mhz
Electronics Forum | Wed Dec 04 04:28:58 EST 2019 | oxygensmd
It seems there isn't right connection between solder and solder-legs. Maybe check that the LEDs get huminidity, have some oxidation on the legs, try different solder paste, check the reflow solder profile. On the photo I can not saw properly reflowe
Electronics Forum | Wed Dec 04 12:42:04 EST 2019 | dunks
We currently use Kester's ep256 as well and it seems to be a bit more grainy than one would expect from lead, especially if the temperature is too low. That paste says it's specialty is being robust over a wide range of profiles and stencil conditio
Electronics Forum | Thu Dec 05 05:39:05 EST 2019 | oxygensmd
I know your application isn't BGA but the data sheet also mention about the peak temperature - 235 Celsius. For the LEDs you can reach higher temperature and I recommend to reach 225-235 Celsius. You will get significantly better results because the
Electronics Forum | Mon Dec 23 12:22:03 EST 2019 | kylehunter
> I would suggest having both SMT lines next to > each other rather than separate by tables, worst > yet, another big machinery. You might not have > the machines yet for those empty line#2 space, > but you can use it as a tempora
Electronics Forum | Fri Dec 27 12:47:21 EST 2019 | ameenullakhan
Dear Team, We are facing open solder issue in a sensor component. Rejection rate is 2 out of 50 components placed. The issue is very random. We have tried increasing the solder paste height from 5 mil to 7 mil. The issue persist still. Differen
Electronics Forum | Mon Jan 13 17:39:49 EST 2020 | avillaro2020
Hi, I need help on how to address the solder wicking on the samtec searay connector after reflow resulting to open solder joints on thick and thermal heavy PCB (4.4mm and 6.3mm). I increased my solder paste thickness to 8 mils, the connector is manua
Electronics Forum | Tue Jan 14 11:53:44 EST 2020 | avillaro2020
Hi Phil, thanks. I am successful using the same connector on small thinner boards 2-2.5kg) i cant make it work, tried all kinds of profiles with vapour phase but to no avail. Yes you read it right 4.3-6.3mm pcb thickness and 2-2.5Kg. And it is 44 lay
Electronics Forum | Tue Jan 28 12:32:44 EST 2020 | jede
We have had a few large human error, wrong placement in the SMT set up over the past year(same package size placed in the wrong feeder position to where it goes unnoticed) and we are trying to look for possible process improvements to prevent this fr
Electronics Forum | Mon Apr 20 23:56:47 EDT 2020 | SMTA-Samy
After I create the pick & place program on the pick and place machine (Assembléon, recently aquired by kulicke and soffa), we generate setup sheets for the operator which lists what component goes into what feeder. Upon loading a tape & reel in the f
