Connecting various devices to Arduino

Question

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

• cguk70: You can use the analog pins as digital input / output pins.
• VE7JRO: Another option would be one of these: instructables.com/…

Answer 1

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.