Adding a LCD display to project , not enough pins on arduino (see Frtitzing pic)

Projects General Guidance
1

Hey guys , im wondering how i could go about adding a lcd display to my project. As you can see in the attachment pin2 and pin13 are already in use (Project is a wire loop game, when the red and green wires at the top touch buzzer sounds and add 1 to counter).

My question is how could i go about adding a display ? Relativlely new to to this but i know that lcd requires all the output pins and leaves me with 4 unused input pins.

Can the tX and Rx pins be used for output to the piezo ?

Thanks in advance !!

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2

You seem to have enough pins for an LCD.
You can also use the analogue pins as digital pins.
Leo..

3

I2C for display?

fcb02a996ad36a4a696171c17b303fc500816f41.jpg
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4

Wawa:
You seem to have enough pins for an LCD.
You can also use the analogue pins as digital pins.
Leo..

LOL as i said im a beginner. Thanks for clearing that up! So obvious now

5

Wawa:
You seem to have enough pins for an LCD.
You can also use the analogue pins as digital pins.
Leo..

same number as how many licks it takes to get the center of a tootsie roll tootsie pop.

6

dave-in-nj:
same number as how many licks it takes to get the center of a tootsie roll tootsie pop.

Oh goodie ! Haven't seen/heard that commercial for a while mr owl :slight_smile:

As for the LCD, you really only need 6 wires (not counting the power/ground/backlight). Check out the Adafruit tutorials - they show how to hook one up. Of course if you use and LCD with i2c that takes even less wires (but increases the cost a bit).

7

you can get a serial to parallel interface that mounts to the LCD. that interface takes power and 2 pins (A4 and A5) and sends data to the LCD over the I2C bus.