Issue with a SIngle 5V Relay

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hello Everyone,
I have connected a simple relay module to my Nano board. The connections are as below:-
VCC → 5 volt pin
GND → Ground pin
IN → GPIO 21
As soon as I make the connections, the relay goes HIGH (switched ON).
I am running the following code but it makes no difference.
But when I make the same connections on raspberry Pi, the relay is NOT HIGH (not Turned ON) and the code works perfectly fine.
I want a working code for switching relay ON for my Jetson Nano. Can somebody please help?
CODE:
import RPi.GPIO as GPIO
import time
channel = 21

GPIO setup

GPIO.setmode(GPIO.BCM)
GPIO.setup(channel, GPIO.OUT)
def motor_on(pin):
GPIO.output(pin, GPIO.HIGH) # Turn motor on
def motor_off(pin):
GPIO.output(pin, GPIO.LOW) # Turn motor off
if name == ‘main’:
try:
motor_on(channel)
time.sleep(1)
motor_off(channel)
time.sleep(1)
GPIO.cleanup()
except KeyboardInterrupt:
GPIO.cleanup()

3

GPIO ch 21,

would you let me know pin number on the connector ?

4

Hello,
I connected the “In” GPIO pin with 18 number board pin first then with 40 number board pin and even tried to change the channel to 18 rather than channel = 21. Both did not work for me. THe relay is already high, when i still run the code, the Green LED brightens a lot more than before.

5

IF you use Jetson Nano DevKit to test,
refer this to find out proper GPIO#.

6

Hello,
I checked the pinouts. I am using Jetson Nano DevKit to test. Can you please tell me in which GPIO shall i use the “IN” GPIO and what will be the channel if i am using RPi.GPIO please? :)

7

Hello everyone,
Which GPIO is not already high on Nano DevKit can someone help me with that please?

8

You can use ANY gpio, sysfs gpio number with physical pin number.
How about use gpio79?