Prototypes‎ > ‎PRODOS‎ > ‎Assembly‎ > ‎

Make the button panel

The button panel allows the user to interact with the robot.  By pressing one of the 4 buttons (tack switches) on the panel the user can select items on the menus displayed on the OLED display.  The panel uses a single analog I/O pin on the Arduino board to communicate the button selection.  It does this by connecting the 4 buttons in parallel with resistors between each button.  

Each button pressed will result in a different resistance on the data pin.  However, if multiple buttons are pressed at the same time it will result in anomalous readings (so only press a single button at a time).  An alternate design could have been used where each button was connected to a digital I/O pin which would have allowed multiple button recognition, unfortunately there were only 3 digital pin left on the Arduino board.


development board x1
8mm socket screw x 2 

 1K ohm resistor x 4 

9mm tack switch x 4

15K ohm resistor x 1

keyed 3 pin housing x 1


safety glasses


soldering iron

allen wrench

solder smoke scrubber

work gloves