[Fjord Carver] brings together an RGB LED and CdS Photoresistor to make a color sensor ... This time around it’s an Arduino doing the measuring instead of a PIC. So why isn’t that sensor ...

We’ve seen [Aaron’s] work before in this area, when he hacked simpler two-color e-ink price tags. He’s also gone so far as creating entire wall displays out of salvaged displays, which is ...