chenanqi341

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presentation slide

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Using fritzing to make sketches for Arduino Project.

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test video

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code

#include <dht.h> dht DHT;

#define DHT11_PIN 7 const int hot = 22; //set hot parameter const int cold = 18; //set cold parameter const int dry = 55; //set dry parameter const int wet = 60;//set wet parameter void setup(){ pinMode(7, INPUT); //sensor pinMode(2, OUTPUT); //red led pinMode(3, OUTPUT); //green led Serial.begin(9600); } void loop() {  int chk = DHT.read11(DHT11_PIN);  Serial.print("Temperature = ");  Serial.println(DHT.temperature);  Serial.print("Humidity = ");  Serial.println(DHT.humidity);  delay(2000); if (DHT.humidity <= dry ) {// make the light flashing  digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)   delay(1000); // wait for a second   digitalWrite(2, LOW); // turn the LED off by making the voltage LOW   delay(1000); // wait for a second  digitalWrite(3, LOW);  } else if (DHT.humidity >= wet ) {  digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)   delay(1000); // wait for a second   digitalWrite(2, LOW); // turn the LED off by making the voltage LOW   delay(1000); // wait for a second  digitalWrite(3, LOW);  } else if (DHT.humidity > dry) {  digitalWrite(2, LOW);  digitalWrite(3, HIGH);  } if (DHT.temperature >= hot ) {  digitalWrite(2, HIGH);//turn the LED on  digitalWrite(3, LOW);//turn the LED off  } else if (DHT.temperature <= cold) {  digitalWrite(2, HIGH);  digitalWrite(3, LOW);  } else if (DHT.temperature> cold) {  digitalWrite(2, LOW);  digitalWrite(3, HIGH);  }  }

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-components:

Arduino board

Breadboard

DHT11 Temperature/Humidity sensor

USB Cable

Jumper wires

Resistors*2 (one is 75Ω for green led, one is 160Ω for red led )

Red LED 

Green LED

AA Battery (1.5v)*4

4AA Switched Battery Enclosure

-Circuit assembly and test 

(in order to show the changing of LED, the induction values were set very close.)

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Code editing:

In the beginning( see the top two images), I searched a wrong coding which is controlling the temperature sensor. the coding is worked but the function is wrong. those coding should use some formula to change the voltage into Celsius. 

Cause I used temperature and humidity sensor(DHT11), I need to install  DHTlib library. After that I start with my code editing.

I tried to figure out some editing issue and added some instructions. Finally, the whole  circuit is working very well.

reference:

https://www.w3cschool.cn/arduino/arduino_blinking_led.html  

http://www.circuitbasics.com/how-to-set-up-the-dht11-humidity-sensor-on-an-arduino/#comments

https://www.instructables.com/id/Arduino-LED-Temperature-Indicator/

https://www.instructables.com/id/DHT11-Temperature-Humidity-Sensor-With-LCD-Display/

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presentation slides 

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experimentation

I set three groups to compare the effect of the different environment on plant growth.

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final model rendering 

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rough prototype without technology

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in Moore Willson, I found some interesting examples for my project.

I bought some stuff from Bunnings to prepare for the experiment.

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rough modeling sketch & working system diagram.

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hydroponic is the inspiration for the final idea. I wanna create a circulation system combine the composter and plant grower together. water/ nutrient solution was circular flowing in the hydroponic system. Nutrition continued to be supplied to plants. the benefit of this technology is we can regulate the daily exposure of the sun, as well as manipulate temperature, air flow, PH levels and carbon dioxide levels.

and then, in order to satisfy conditions of composting, I searched some information which is about the operation mode of agricultural automation machine.

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research about composting

conditions:

1.Organic waste - newspaper, leaves, grass, kitchen waste (fruits, vegetables), woody materials 2.Soil - source of microorganisms 3.Water 4.Air - source of oxygen

effect:

-for the world: Compost production is considered an economic and environmentally friendly means to reduce the waste going into landfill. Compost application can improve soil quality and productivity as well as sustainability of agricultural production by replenishing soil organic matter and supplying nutrients. Organic matter is a vital component of a healthy soil as it plays an important role in soil physical, chemical, and biological fertility.

-for environment:

1.Save Valuable Landfill Space By separating biodegradable food waste from non-recyclable trash it reduces the dependency on valuable landfill space.

2.Reduce Greenhouse Gas By composing organics you not only reduce the emissions that garbage truck creates by carting it off to the landfill, you reduce the amount of methane gas. When food waste is added to landfills it releases methane gas into the air which is worse than carbon dioxide.

3.Promote Healthier Crops Compost creates a denser more nutrient-rich soil which in return:

Improves water movement Holds more water Increases air exchange Promotes root development Eliminates the need for harmful pesticides Better soil promotes higher yields of crops.

4. Improves the Environment Denser healthier compost soil helps to protect our water systems. Since compost increases the soils ability to retain water and promotes a healthier root system it reduces the risk of runoff.

Also since composted soil does not need harmful fertilizers and pesticides there will be no chemical runoff polluting our water.

reference:

https://home.howstuffworks.com/composting1.htm

https://digital.library.adelaide.edu.au/dspace/handle/2440/81916

the traditional way to make the compost:https://www.youtube.com/watch?v=0BV-xAlFG2o

http://actioncarting.com/blog/entry/composting-what-it-is-why-you-should-and-how-to-compost

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indn341 p2

ideas development

my first idea was to design a rubbish bin which has a dryer system to desiccate food waste. the aim is to reduce the bad smell of food waste and to make dried compost to plant the garden. but this idea is quite simple and similar to real products which already existed. 

then, I changed my focus on composting recirculation process. I was thinking about how to make a household composter that including some new technology and innovative design. For the second sketch, it's showing three split parts of the whole structure. but this one seems don't need any technology to support. 

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INDN341 P1partB reference

household garbage bin.

http://www.wri.org/blog/2015/12/whats-food-loss-and-waste-got-do-climate-change-lot-actually

https://www.universityofcalifornia.edu/longform/what-you-need-know-about-food-waste-and-climate-change

https://foodsecurityfoodjustice.com/2017/11/09/understanding-food-waste/

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Online researches about components.