Part number for Ambient Light Sensor in Blinky POV

[stephmur]

Could you provide a part number for the ambient light sensor in the Blinky POV? I don't know that much about light sensors and would like to look at the datasheet of the part you use. They look like LEDs, but they aren't, right?

Thanks,

--Steve.

[layne]

Yeah sure, no problem. We've got no secrets here :- ) I will make a note to add the interesting parts' numbers to the parts list page in the very near future, but for now, here's the info on the light sensor:

It's a 3mm LED-like package of the TEPT4400 made by Vishay Semiconductors. Here are the Mouser and Digikey product pages.

They act like light-sensitive resistors, where they have very low resistance when exposed to a bright light up close, and have a higher resistance when it's dark (I may have that reversed, check the datasheet). We form a simple resistor-divider with the light sensor and a 10k resistor, connected like this:


Vdd ------ light sensor ----- analog input pin ----- resistor ---- ground

Let me know if you have any other questions!

[stephmur]

Thanks! Your web-based programmer looks really cool. I saw a YouTube video on one of my RSS feeds.