Minimize pins usage of Arduino mega with 3.5 inch TFT lcd display shield

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1

hello,
I am using a Arduino Mega with 3.5 inch TFT LCD display shield for mega for my project (Display). I want to minimize the pins usage of my Arduino mega.

2

With that display you are stuck with the number of pins used by the display interface

Are you really that short of pins considering that you are using a Mega ?

3

Yes, I have few solenoid valves control pins I have very few pins left in Arduino mega.

4

I assume that when you say that you have very few pins left you have used the analogue pins as digital pins where appropriate, such as for controlling solenoids

5

For solenoids, a shift register or I2C port expander should work.

6

I am left with all analog and communication pins in Arduino mega.

7

post a schematic and image of the project that is using nearly all the pins of a Mega, please.
I'd like to see this.

8

Analogue pins can be used as digital pins. Of the 16 analogue pins how many have you used ?