Saturday, January 25, 2014

Using Analog (Analogue) Sensors


We are now using the LDR as the switch for the light. The Light Dependent Resistor measures the continuous signal of light in a room and outputs a voltage that has a numerical value of 0 to 255 (dark to bright). In this image the LDR is measuring the natural light in the room and sends the signal to turn on the LED light. 

In this second image the LDR if covered by my finger so no natural light is being collected by the LDR so it does not emit a voltage/ signal to turn on the light. So the LED light will remain off as long as I remain my finger on the LDR. I really enjoyed this lab and thought the sensor was very interesting. 

For the second experiment we placed two LED lights on the breadboard. So we are now able to be more specific on the natural light range and the unique indicators we enforced to know where the LDR was at. In this experiment I was able to get all four stages. Super bright with 2 lights on then Bright with green light on, then dim with red light on, and lastly dark with no LED light on. This image would be bright.



This image is of dim lighting in the room. 

This image is of super dark.

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