LDRs or Light Dependent Resistors are very useful especially in light/dark sensor circuits. Normally the resistance of an LDR is very high, sometimes as high as 1000 000 ohms, but when they are ...

Here, inspite of the I2C interface, just an analog input of the Arduino is used. Needless to say, a simple add-on hardware is necessary for this little experiment. The hardware is nothing but an ...

- One phototransistor to detect infrared and visible light - An I2C digital temperature sensor to introduce between-device digital communication Shipments are expected to begin on May 2nd for $60.