How To Connect Multiple Pushbuttons To One Arduino Input

In this Tutorial video, I'm going to be showing you how to connect up to 50 pushbuttons to a single Arduino analogue input. This enables you to free up a lot of your IO for sensors, displays, motors and servos, allowing you to build more complex projects.

Components Required

If you've got any Tutorial requests or suggestions, let me know in the comments section below. I'm always looking for suggestions.

[kevinchamberlain]

I have been searching for a simple and affordable solution to control turnouts on my model train layout using pushbuttons. Your explanation is clear and helped me decide that the Arduino together with the PCA9685 servo controller is that way to go. Thank you for that.

[SamHodby]

Brilliant! You just saved me so much hassle with too many digital/analogue pins being used.

[deletedmediatj]

i've been looking for this solution for the past 5 months!!!

[mohammedabdulbasit]

I'm glad to watching your video. In this video teach me practical learning. Thanks to you. Abdul Basit from Bangladesh.

[KSATica]

Your amazing….. thank you so much inspired today 👏👏👏👏👏👏

[casalguayaquil]

Excelent explaination. The only thing is that the floating ground was not placed back into the drawing, which is what makes de vudeo stand from others.

[varnamq]

all you need is to put as many distinct(not of the same value) resistors in parallel as there are buttons and connect the buttons in series to those resistors, this will give you an unique voltage drop even if multiple buttons are pressed.

[Ampereg_]

Could you make something like this, but with button on/off latch?

[bluehippotech]

Awesome tutorial and very clear! Thanks

[Andrewthegreatish]

This wouldn't let you detect two buttons being pressed at once right? It would think it's just a different button further down the chain ?

[mikelee]

I have an arduino project that has a potentiometer on A1 which is used to produce 12 different tones. I want to convert the pot to momentary push buttons so I can play like a piano keyboard. I am thinking your example should work as a solution for me?

[D_Printing]

Good idea:; resistors, by careful math's, you could maybe do two or more buttons at the same time, I think :)
something like 1000 Ohms is button 1; 2000 Ohms is button 2 and then 3000 Ohms is both buttons, (series) or what ever it is in parallel

[dice]

Dear brother can you help me a very small correction in my code

[welcometomcdonaldsmayitake]

Why I just learned this after years of Arfuino projects... I feel so dumb rn...

[milespeterson]

This is stupid, why do you need resistors for EACH pushbutton???