I need some help understanding a strange voltage drop…
I’m buiding a Motion sensor that when motion is detected will trigger a reset signal (single rising edge) on an ESP8266.
I’m using a AM312 as motion sensor itself that is powered by a 3.3V source and outputs a 3.3V logic signal for a couple of seconds when motion is detected.
The motion detector on itself is working great. I tested it before I soldered it to my PCB and I got a correct 3.28V output as expected.
When however I connect it to my PCB… suddenly the output voltage is barely 0.65V… This is not sufficient to be used as logical input… I don’t understand why a 3.3V output when soldered to a pcb suddenly gives 0.65V… (yes soldering point are properly done, no bad contacts).
I’m providing you with the below schematic in case it helps.
Can anyone help me clarify why I get 0.65V instead of the 3.3V ?