Changes

For my midterm project I have created an automatic light bulb switch. I used a photoresistor that senses when there is light and thus the light in the bedroom turns off and as soon as it's dark then the light bulb turns on. The idea for having an automatic light switch is that one an individual will never have to forget to turn it on or off and as it will just work works automatically. I used a photoresistor, a variable resistor (the 10k), a few resistors, an LED, a breadboard, DC battery as a power supplier, wires, a regulator that will fix the light level as desired by the user, and an iron solder to connect the wires with the flux cores. The transistor controls the switch that will allow the light to turn on using battery power. A transistor is an electronic component that could be used as an electronically operated switch through its three contacts: the emitter (E), base (B) and collector (C). The transistor opens the collector/emitter when a small current is present at the transistor’s base.The “automatic night light” is placed within a Tuscany like bedroom where the LED turns on every time the door closes and turns off every time the door opens. I have created a 3-D model of the Tuscan room and placed the light within the interior of the model. Increasing the brightness changes the resistance of the photoresistor, because as it gets brighter there will be less resistance. When the photoresistor has less resistance the transistor’s base has a greater voltage. In order to fine-tune the circuit, I used a regulator knob that will sense the light and dark conditions. After fine-tuning the circuit, the LED lights up whenever the light hits the photoresistor. The wires are all placed through “the wall” of the bedroom and the breadboard is placed under the bed, or “the ground”, with the intensions of making the model more aesthetically pleasing.