Geeetech

hello i am using the GT2560 board and wanted to attach an inductive sensor to it https://www.aliexpress.com/item/M8-2mm- ... 4c4dr18Fcr

my idea was to wire it against the z min input

i have wired this solution

but the brown cable is on 5 V because i am using a inductive sensor designed to use 5V
and R1 is 22k ohms

when measuring the input of z i always get 0.33Volts regardless of having contact or not

Hello.


If your sensor is supplied with 5V DC voltage, a voltage divider on these (R1 R2) resistors is not required.
The main µC on the controller board is also powered by 5V DC voltage.
In this case, the voltage range at the output of the sensor is compatible with the voltage range at the µC input.

For verification you can measure the sensor output voltage before resistor R1. Black wire.

how much do you think the R1 value should be ?

You don't need a voltage divider if you're running the probe at 5 volts. Try testing the Black Signal wire with no resistor.

Hi.



For clarity.

Resistors R1 and R2 are voltage divisors. This circuit is right when the sensor is supplied with voltage higher than the main µC of the controller.
In your case you can skip this part of the circuit.

If you want to leave the serial resistor R1, it can be e.g. 1kΩ. But it is not required.
To make you feel confident in this topic, read the message from the link: voltage dividers.

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