Controlling Timer Settings Using Touchpad
Introduction
Now that we know how to dynamically display the countdown on the OLED screen, let’s go ahead and make a self-contained “app” that will allow us to set the time we want using just the touchpads.
Components Needed
- Little Python Brain
- A tablet/phone/laptop
1
Setting up the touchpads
First up, we need to import the lp_sensors library and set the touchpads up. We only need L1, L2, and R1 for this project.
2
Replacing the User_Input and setTime blocks
We will then remove the User_Input and setTime blocks. We will change the way we initialize the setTime variable.
3
Adding a new setTime variable
Instead, we will be using an x = y block to initialize the setTime block. Simply change the x to setTime and y to 5.
4
The setTime while block
What this condition means is simply that while we still haven’t pressed R1, it will execute the code inside.
5
Displaying the timer
We need to display the current timer setting so we can reliably change it.
6
Conditional statements for L1 and L2.
Finally, we will create two conditions. L1 (Down) will reduce the timer while L2 (Up) will increase it.
Add a sleep(0.1) after conditional statements.
The Complete Code
Run the code. On the next lesson we’ll integrate a limit that will stop the user from setting the time below 1 second as well as add some buzzer elements as an alarm tone.