Thankfully, Arduino projects can ease you into ... are known as either pull-up or pull-down. A pull-up resistor connects your input directly to a positive voltage (5V or 3.3V).

[Bas] is using a light-dependent resistor and a pull-up resistor to create a resistance bridge, which is then connected to an analog input pin on a Raspberry Pi Pico. But [Bas] didn’t do this ...

The on-board 1-MΩ pull-up resistor calls for a very high-resistance LDR ... on-board voltage regulator, and Arduino IDE compatibility. The code is an Arduino project for the Digispark Attiny85 to turn ...