After soldering 16 of these, a bunch resistors were shorted. I got some tips from a friend that is good at soldering (use a microscope and go slowly) and got them all working.
Now though every few days a voltage divider will either get stuck at 3.3V or ground or somewhere in the middle. If I re-solder the resistors it'll work again. Even if I just reflow the solder on the resistors it will start working again.
- Any idea why they keep breaking after a few days?
- Any ideas how I can get them permanently working?
The resistors are all 0603 and 0805 footprint.
FYI: I used two 150k ohm resistors instead of one 300k resistor because I was worried about a 100V drop across just one.