L1: Using buttons - Physical Computing
What is the purpose of using a pullup resistor in an 8051 microcontroller? - Quora
The Pull-Up Resistor: How It Works and Choosing a Value
JTAG Boundary-Scan Test Tip: Strong Pull-ups on FPGAs - Corelis Boundary-Scan Blog
What is Pull Up and Pull Down Resistor and Where to Use them?
Working of Pull-up and Pull-down Resistors with Examples
avr - What is the purpose of a pull-up resistor in a microcontroller? - Electrical Engineering Stack Exchange
Arduino Internal Pull-Up Resistor Tutorial - Bald Engineer
Using Pull-Up and Pull-Down Resistors | Stratify Labs
Using Pushbuttons with Arduino. Pullup vs Pulldown resistors - Hackster.io
How to select a Pull up or Pull down resistor value – BytesofGigabytes
Pull-up Resistors and Pull-down Resistors Explained
Understanding the Pull-up/Pull-down Resistors With Arduino : 6 Steps - Instructables
The Pull-Up Resistor: How It Works and Choosing a Value
Microcontrollers and pull-up / pull-down resistors - Łukasz Podkalicki
InputPullupSerial | Arduino Documentation | Arduino Documentation
L1: Using buttons - Physical Computing
Understanding the Pull-up/Pull-down Resistors With Arduino : 6 Steps - Instructables
What is Pull Up and Pull Down Resistor and Where to Use them?
Pull-up Resistors - SparkFun Learn
Pull-up Resistors - SparkFun Learn
Microcontrollers and pull-up / pull-down resistors - Łukasz Podkalicki
Digital Input Pull-Up Resistor | Arduino Documentation | Arduino Documentation
Pull Up Resistors - Tinker Hobby
