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I need to connect the following devices to an Arduino UNO board. The problem is that I run out of pins to be able to connect them all. Is there any way to do it?

  • ultrasonic sensor
  • yellow led
  • green led
  • red led
  • buzzer
  • keypad 4x4

I'm doing the project in Tinkercad

In the picture below I tried to do it, but I am missing 2 pins for the ultrasonic sensor trig and echo

enter image description here

Carlos Muñoz
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1 Answers1

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As cguck70 already stated in the comments: The pins A0 to A5 can be analog input pins, but they can also be normal digital input/output pins. You can use them to your liking, just like any other digital input/output.

So just connect two of these pins to your ultrasonic sensor and use the pin names A0, A1 and so on in your code.

chrisl
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