which will be considered a low logic level. For the L0 LED to be turned off, P2 must be configured as an input (high-impedance state). The diode D0 is used to avoid a short circuit when LED L1 is ...

The configuration in the code above has the buttons connected to digital pins 2, 3, 4 & 5. The output pin as 13 (LED). The sequence the buttons should be pressed as 3 then 5 then 2 then 4. The time ...

The button states could easily be read by using an Arduino’s analog input. A Pro Mini model was chosen for its small size as it could be housed in the radio compartment of the dash.

Learn how to connect multiple buttons to just one Arduino pin using clever wiring and resistor techniques. Perfect for compact projects, keyboards, or when using small boards like the Nano or Pro ...