Hi all,
I run my jetson orin nano with 12v DC battery. I want to extract or read the input voltage the jetson is getting. For that i follow the nvidia documentation and refer to this folder:$ cat /sys/bus/i2c/drivers/ina3221/1-0040/hwmon/hwmon/inx_input . And it was so confused to see which one is input voltage as there are 7 in_1..7_voltage. then i tried to read the voltage of all and get the output as:orin@orin-desktop:~$ ./voltage_input.sh
in1_input: 5080 mV
in2_input: 5072 mV
in3_input: 5080 mV
in4_input: 5320 mV
in5_input: 1200 mV
in6_input: 1360 mV
in7_input: 10920 mV
since the in7_input is close to 9-19v i assume this as input main supply. And then i start reading in7_input in every 1ms. and i get some surprise outputs:Wednesday 02 April 2025 04:51:02 PM IST: 14.88 V
Wednesday 02 April 2025 04:51:02 PM IST: 8.68 V
Wednesday 02 April 2025 04:51:03 PM IST: 7.92 V
Wednesday 02 April 2025 04:51:03 PM IST: 12.60 V
Wednesday 02 April 2025 04:51:03 PM IST: 11.04 V
Wednesday 02 April 2025 04:51:03 PM IST: 9.32 V
Wednesday 02 April 2025 04:51:03 PM IST: 11.12 V
Wednesday 02 April 2025 04:51:03 PM IST: 7.56 V
Wednesday 02 April 2025 04:51:03 PM IST: 13.00 V
Wednesday 02 April 2025 04:51:03 PM IST: 9.60 V
Wednesday 02 April 2025 04:51:04 PM IST: 8.00 V
Wednesday 02 April 2025 04:51:04 PM IST: 12.20 V
Wednesday 02 April 2025 04:51:04 PM IST: 11.08 V
Wednesday 02 April 2025 04:51:04 PM IST: 11.28 V
Wednesday 02 April 2025 04:51:04 PM IST: 10.40 V
Wednesday 02 April 2025 04:51:04 PM IST: 9.04 V
Wednesday 02 April 2025 04:51:04 PM IST: 8.52 V
Wednesday 02 April 2025 04:51:04 PM IST: 7.68 V
As we know jetson runs or operates between 9-19v. But in my output you can see voltage less than 9v. And i mentioned earlier , my power supply battery is 12v , even i see output as 13v and 12.2v that is more than 12v. How is it possible? Am i missing something.
Any insights and leads on this will be helpful . Thank you in advance
Best,
Amar
