I was considering buying a cheap color sensor board from Elecrow, because it claimed “This module is based on the color sensor TCS3414CS with digital output I2C.” That chip is a pretty nice one with a good spectral response.
But I took a closer look at the image on the web page:
The package that the chip is in is clearly the FN “dual flat no-lead” package and not the CS “6-lead chipscale” package, which is smaller and has no contacts on the sides. Normally, a change of packaging like that makes little difference (other than to manufacturing cost), but the TCS3414CS and TCS3414FN chips have different spectral responses:
Since infrared light can throw the readings from the TCS3414FN chip way off, I can’t see any point to get a color sensor using the FN package (one would have to add external optical filters, which eliminates any price advantage the FN chip may have). I’m a little surprised at Elecrow claiming to have a TCS3414CS chip, when their picture clearly shows the less useful TCS3414FN chip. It makes me suspicious of other claims Elecrow makes.
Note: I’ve had Elecrow make boards I designed and assemble them, and they did fine work—but anything that they designed I’ll want to look at twice to make sure they’re not claiming more than they’re delivering.