How to Set Up Keypads on the Arduino - Ultimate Guide to the Arduino #22

[@taleenflowers4991]

the arduino app says that there is no file or directory what shoud i do??

[@AlfonsoSalaverria]

I'm new to all of this and I wanted to know what kind of wires you're using to test your connections at 6:23?

[@johnkaradimas8403]

Thankyou great video, also well explained on how to test the matrix switch array with a multimeter.

[@roncole5789]

This was helpful because I installed this keypad to my trailer wall so it goes through the wall and then I think I was looking at it backwards so instead of getting one out I got 7.

[@xJKAirsoft]

the keypad by mark stanely isnt available and the link doesnt work.

[@Aleinux]

Awesom. The video volume is a bit too low, but the explaination was awesome. Great video

[@arvindh13]

Can we use it for 8*8 keypad?

[@DylanCodes.-.]

Jesus Christ dude

[@arvindh13]

Mr brilliant sir, I'm asking for a 8 by 8 which is twice this size & a lot of buttons mean a lot of signal interference.@@DylanCodes.-.

[@DylanCodes.-.]

@@arvindh13 Mr brilliant sir, I know. I said Jesus Christ because that's giant

[@DanielSMatthews]

If you wanted to do that with an interrupt you only need to set up 4 as one of the row pins will always be high during any keypress? I guess a 4 input OR gate would let you only use a single interrupt to service the keypad rather than constantly polling it and this may be useful in low power applications. Perhaps you can even use diode logic with 4 diodes and a resistor to drive an interrupt pin?

[@ericgrante7043]

goog video