Lesson 11 - Keypad Membrane Switch Module

[@disneygamerdonut214]

I’m getting a problem where it’s saying
0cm
0cm
0cm
0cm
0cm
0cm
0cm
0cm
Over and over one line per second, am I doing something wrong or?

[@eddie6584]

I’ve added a bit of code to the sketch in the void loop that says:
if (customKey == ‘1’){
digitalWrite(ledPin, HIGH);
delay(1000);
digitalWrite(ledPin, LOW);
At the start of the code I said:
int ledPin = 13;
I’ve connected a jumper lead from digital pin 13 to a 220 ohm resistor then to a white LED which is the connected back to GND but for some unknown reason, it shorts out the circuit and I don’t know why. Please help

[@calrosalomon3397]

don't use the pin 13 because there is an built in led on arduino board that is connected to the pin 13 of the arduino uno, or u could just remove the jumoer wires and use the built in led on the arduino

[@luigiinfanzon2199]

Is it possible to use this component to , for example, unlock a device using a passcode?

[@jermaine388]

yes

[@theohappyjoystick]

Great lesson!

[@lmhugard7149]

thanks

[@emberleona9278]

There are chinese finger covers for fretting guitar or maybe touch screen? That MPR121 may work with them/

[@robertquanders]

What's the book you use?