Jetson Nano E18-D80NK Proximity Sensor Voltage divider

[sidhant.abap]

Hello Experts,

Help needed on interfacing E18-D80NK proximity sensor

Characteristics of the E18-D80NK:

Supply voltage: 5 VDC
Working current: 150 mA
Max. detection distance: 80 cm

Description of the wiring:

Sensor’s VCC is connected to the external power supply board 5V output
Sensor’s OUT is connected to a voltage divider and then to the Jetson Nano GPIO 7 (input mode)
Sensor’s GND is wired with one of the Jetson GND PINs and the power supply board GND

Voltage Divider:
2.2 kiloohm resistor between the Jetson GPIO pin and ground.
1.0 kiloohm resistor between the 5V-output sensor pin and the GPIO pin 7.
I have a common ground connected Jetson, Sensor and External supply board.

The voltage divider is not working for me, on access the GPIO pin 7 I get low value all time.

Thanks in Advance

[KevinFFF]

Hi sidhant.abap,

Are you using the devkit or custom board for Jetson Nano?
What’s your Jetpack version in use?

Could you share the block diagram of your connection for further check?

[sidhant.abap]

Thank you!! for the response.

I have fixed it by using a 4 channel logic level converter. Actually the voltage divider was not giving me 3.3v output, with Logic level converter I am now providing my GPIO pin a 3.3v input.

Please let me know if 3.3v is not safe for GPIO pin to except input.

Thanks again

[KevinFFF]

It’s okay for you to use 3.3V for GPIO on Jetson device.