One thing didn't work due to corrosion
I ordered a buck (voltage) converter and two small segment voltage meters. One of the voltage meters didn't work, on closer inspection there was white corrosion on the print, likely causing leak currents, blocking its working. I discovered the corrosion an hour after opening the plastic sealed around it, so I guess it was packed and sealed with moist or water drops inside. The (identical but not corroded) other voltmeter and the buck converter work fine, slightly better then expected. (in terms of precision and lower then expected power wasting)
Beveelt aan
12 September 2024
pieter
Amsterdam
Reactie van TinyTronics
Hi Pieter,
Thank you for your review and feedback.
The white corrosion you have seen on the PCB is most likely soldering flux residue. Other voltage meters from the same batch also have this flux residue and it is relatively harmless. Based on your feedback we think the voltage meter simply contains a manufacturing issue so we will ship a new voltage meter to you today which we will test in advance.
Sorry for the inconvenience!
Greetings,
Loek - TinyTronics