Can I use one digital pin port to use two trigger pins?

Projects General Guidance
1

Hi, I am making a car with Arduino Uno, and I am working on to use the ultrasonic sensor to detect obstacles. Because I have only three digital pins left but I have to use two ultrasonic sensors, I decided to use two trigger pins in one digital pin. Is it possible to do like this? If I can't, how can I use two sensors requiring 4 digital pins total?

#define Trigger_L 11   
#define Echo_L 8      
#define Trigger_R 11  
#define Echo_R 12
2

Welcome to the forum

Which Arduino board are you using ?
Have you used all of the analogue in pins ?

3

I am using Arduino Uno with a sensor shield on it. Can I use analogue pins instead of digital pins?

4

You can use analogue pins as digital pins. Just treat them as normal using pinMode(), digitalWrite(), digitalRead() etc

5

Thanks, I will try it!

6

Yes you can, as UKHeliBob has already said.

And to prove it, the Arduino Uno uses pins A4 and A5 as digital pins for I2C communications.

7

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