exactly. why is the board damaged? looks like water ingress
sweafa
joined 1 year ago
yes i think so, but u would have to make sure the solder will rise through the through-hole as mich as possible. maybe u can try to find the faulty pin with wiggling them separately
kann es sein dass es gar keine biene ist sondern eine raupenfliege oder eine stubenfliege? weil irgendwie fehlt mir da das pelzige an dem insekt.
pressfit connections usually are very reliable. if there is a poor connection i would presume that the barrel of the via is broken and a new pressfit connector will not help. maybe putting solder in would help. did you already test for poor connections?
ah well, then it doesn't work proper with 5v unfortunately
usually fans have a min start voltage. u can try if your fan starts at 5v and if the resulting RPM is ok for you, just solder it without any resistor on USB
i would probably do some circuit with a TL431 and FETs, but this also drains some small amount of battery current.
i assume its measured under laboratory conditions, so it seems ok to me. TCXO, OCXO should usually be operated within their operating voltage range. depends on type. usually i would assume 1.8-3.3v, but who knows without datasheet?
it could be worth a try to contact diodes and ask which components use or have used in the past V-QFN2030-12 (Type HE) package
diodes uses packages like this one: https://www.diodes.com/assets/Package-Files/V-QFN2030-12-Type-HE.pdf but cant find FMM marking there ...
i like those triple supplies from rigol. its much like the siglent you posted, but the 3rd channel is not fixed. its also fairly easy to script it with python. dp800 series.