As photons (light) land on the detector, the resistance will decrease. The more light is we will have a lower resistance. By reading different values from the sensor, we can detect if is it light , ...

Up where the original “lens” was, he installed a PIR sensor, some white LEDs, a light sensor, and the original blinking red LED.

Posted in Arduino Hacks Tagged arduino, Arduino Uno, motion sensor, servo, useless box ← Older posts ...

Always under-watering or over-watering your plants? Wire up this Arduino-based sensor and save them.

Adafruit has this week announced the availability of its new LTR390 UV Light Sensor and is one of the few low-cost UV sensors available on the market.