MicroPython • Re: pir sensor value never goes to 0

This 20k resistor would be the culprit (need to be below 10k to overcome E9).

We don't know how OP has connected the sensor.

if it helps, the 2 bottom pictures are without an external pulldown, it stays at 1.27v when not moving and goes to 2.29v when moved

the top one with an external 1m ohm pulldown, that seems to work, goes to 0v when not moving and 2.29v when moved, but only when the multimeter is on, this it too complicated for my limited electronics knowledge

and yes the pir sensor has a '203' resistor on it, so if I want it to work without the ADC I either need the a4 stepping or switch the 20k resistor on the pir sensor with a 10k ? did I understand this correctly ?

Statistics: Posted by tiotags — Sat Jan 03, 2026 1:27 pm

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