• Elvin Ou

Analog and digital input

The struggle was real.

I had really hard time in class trying to understand the delay that the input would create, the whole concept of "present" and "previous". After trying out building my own Arduino, I have realized how the whole thing works. The digital input is pretty much the power source that gives tasks to control the output, so after figuring that out, it was easier to execute ideas out for the way I wanted leds to work.

Testing out the digital input and output.

Testing out the analog input and how to code that in Arduino to output.

Testing out for loops in Arduino to program less to flash in order.

Adding in another for loop and a button to make changes when the button is clicked.


Observation: Key Card Entry System

I assume that there is a magnetic stripe or some sort of embed chip in the key card, and the system embedded in the door lock responses to that to function.


In terms of how people use it, depending how the surface area that is actually in contact with the door lock, the angel, the distance, maybe the front/back, the door lock response differently.


In terms of time spent, the majority of people can get through the door at one take ; some of them tried multiple times to place the card on; some of them didn't bother to take the card out of their wallet, so it didn't work that well until they take it out and tap the card again.