Dejan Levec

Need to start reading datasheets

I have been wondering for a while how to measure household electricity consumption. Usual candidates are photoresistor for detecting LED’s flashes or current transformer, but since I can’t use either of them, I need something different. A while back I tried using webcam mounted to the electric box which contains electricity meter, which worked pretty well. Downside was that I needed a computer to detect LED’s blinks which meant unnecessary use of 40W 24/7 every day for older laptop I don’t use anymore.

So I thought about it and decided to try with RGB sensor, that has filters and can detect all three colours seperately. I stumbled upon Avago ADJD-S311-CR999 which goes for about 3€ on Farnell.com, and everything seemed like I might actually start measuring electricity consumption.

Ain’t it nice?

I actually saw datasheet before I decided to buy it. After my thorough research I concluded that it contains nice graphs like this:


Sadly, when I finally received it, all I got was this:

I really need to start paying more attention to datasheets before I actually buy things, because this will be quite a challenge to solder considering that it has 9 pins.

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