You will need the following parts for this tutorial:

• 1x Adafruit IO compatible Feather
• 3x jumper wires
• 1x 10k resistor
• 1x photocell

You will need to connect the following pins to the photocell and 10k resistor:

• Feather GND to one leg of the 10k resistor
• The second leg of the 10k resistor to one leg of the photocell
• Feather A0 (or ADC) to the same leg of the photocell as the 10k resistor.
• Feather 3V to the second leg of the photocell

Note: Resistors and photocells are not polarized, so they can be connected to the circuit in either direction.