Analog Sensor Circuit Clarification

Community General Discussion
1

I came across this Arduino circuit that connects to a floormat sensor via mono jack I can't fully understand.

3BSGm
3BSGm766×316 14.6 KB

I think it's designed as a voltage divider but why is 10K connected to 3V3 instead of GND?

Is this circuit broken?

Thanks in Advance. Charge

2

R6 is used as a pullup, the sensor contacts connect to GND.
R8 and C6 form a low pass RC filter against bouncing contacts.

3

If you are interested to understand the reason for the circuit, this tutorial may tell you.

4

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