Model Answer:
1. New Variable: Add an integer variable to hold the push button state, such as int buttonState = 0;.
2. Reading the Button: Use the digitalRead(buttonPin) function in the loop to read the button state and assign it to the variable: buttonState = digitalRead(buttonPin);.
3. If Conditions: You have two primary clean options to modify the logic:
- Option A (Direct Logic Link): Modify each color condition using the logical AND (
&&) operator to also check that the button is pressed (HIGH):
if (potValue <= 340 && buttonState == HIGH) { ... }if (potValue > 340 && potValue <= 680 && buttonState == HIGH) { ... }if (potValue > 680 && buttonState == HIGH) { ... }
- Option B (Nested Master Block): Wrap the entire potentiometer color selection logic inside a master
if (buttonState == HIGH) block, and put an else block that turns all pins LOW when the button is released.