Description - Pull-Up Resistors
Pull-up resistors fix input pins, pushbuttons, and switches. They keep the pin of your Arduino, LaunchPad, or BeagleBone at a known value. There is one catch when you use them, so make sure you checkout the full video.
When you enable the internal pull-up resistor, you want to connect one side of your button to the pin and the other side to ground. If you use an external pull-up resistor, use something between 10k and 100k.
- Arduino Uno [via makershed]
- LaunchPad [via energia]
- Fluke Multimeter
- Rigol Oscilloscope
- Breadboard-able Tactile Pushbuttons [via adafruit]
- Two pushbuttons on one pcb [via tindie]