Their sensor uses a four-lead RGB LED, but we suppose a Neopixel could be used as well. ... A 555 timer pwning the Arduino. Report comment. Reply. goodidea says: August 29, ...

[Fjord Carver] brings together an RGB LED and CdS Photoresistor to make a color sensor. Those Cadmium Sulfide lights sensors usually have a very wide swing of resistance when exposed to varying lev… ...