Datasheet

In my workroom, I got about 24 degrees C and a 'light measurement' of about 400 -

remember that while the temperature sensor gives an 'absolute' reading in C or F, the light

sensor is not precise and can only really give rough readings.

Once you've verified that the sensors are wired up correctly & running its time to get to the

logging!

Logging sketch

Download the light and temperature logging sketch from GitHub (http://adafru.it/c7e). Insert

the SD card. Upload the sketch to your Arduino. We'll now test it out while still 'tethered' to

the computer

While the Arduno is still connected, blinking and powered, place your hand over the

photocell for a few seconds, then shine a flashlight on it. You should also squeeze the temp

sensor with your fingers to heat it up

Plotting with a spreadsheet

When you're ready to check out the data, unplug the Arduino and put the SD card into your

computer's card reader. You'll see a at least one and perhaps a couple files, one for each

time the logger ended up running