In this experiment we are going to use a element called photoresistor. This sensor allows us to interact with the external environment, through intensity of light. The photoresistor is based on light ...

Create the circuit. Using the famous ‘murf CAD’ software, we mapped out circuit above. Here’s a summary of the circuit in words: 3.3 volts -> photoresistor -> D13 pin (this is where we read the ...

The electronics part is quite simple because the circuit is a simple voltage-divider, and role of the arduino is only to sample voltage across the (resistor 10Kohms + potentiometer) using the analog ...

Chanzon 5mm 0.2 Ω ohm Photoresistor LDR Resistor 5506 GL5506 Light-Dependent Photoconductor 20pcs Photo Light Sensitive Photodiode Specification: Receive Wave Range : 400-1100 nm Response Peak ...

Now download the latest Arduino software from here and install it in your PC. Compile the sketch (Shadow_Alarm.pde) listed at the end of this article. Upload the code into ATmega328 microcontroller on ...