Instructables link : https://www.instructables.com/id/CATOYLAMP/

I was inspired by cat toys and the shape of ground cherries. I created this lamp project for my cat. When I couldn’t spend time with my cat and left her alone at home for long time. it makes me feel bad. especially, when I went out in the morning and came back to home at the night time. My cat left alone in the dark space. I couldn’t turn on the light and left home. That’s why I decide to make this lamp with a photocell sensor which senses the brightness. In my lamp, There is three lamps and lamp will be turn on by the brightness of its environment. for example. When It’s completely dark all 3 lights will be turn on. If it’s little bright then 2 lights will be light on. when it’s bright but little dark then 1 light will be turn on. when it’s really bright then no light will be turn on.

for materials,I try to use materials that cats like. I choose to make lamp shades with origami paper because cats like the sound of paper boxes. for the pole, I cover it with knitted fabric and braid wires with three different colors of normal yarns to give a soft feeling.

Prototype test

first I try to do prototype test with an Arduino and a bread board with 3 LED lights and a photocell sensor. I use 10k resistor for a photocell sensor and 220 resistor for each LED light.