Wiring

Wire up the solderless breadboard using the header leads as shown below.
Both the photoresistor and the resistor can be placed either way around. They are arranged in what is called a "voltage divider" arrangement.

The orange lead to pin P9.40, which is also analog input 1 (AIN1). Note that only certain pins can be used as analog inputs (see http://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/adc)

Connect the blue lead from pin 34 of P9 to the bottom of the resistor and the red lead from pin 32 of P9 to the top connection of the photoresistor.

The pins are numbered left to right, 1, 2 then on the next row down 3,4 etc. You can find out about all the pins available on the P8 and P9 connecters down each side of the BBB here: http://stuffwemade.net/hwio/beaglebone-pin-reference/
This guide was first published on Jul 01, 2013. It was last updated on Jul 01, 2013. This page (Wiring) was last updated on Jul 15, 2019.