2. Methods

Equipment list : 
Overall system: 
1.Wooden Box (70cm X 70cm X 72cm) x1
2.Hydro Generator (3.6V) x4
3.Hot Glue Gun x1

Water system:
1.Rubber Pipes (Diameter) (6 meter length)
2.Shower Head
3.Tap

Electrical system:
1. Solid Wires x10m
2. Batteries(3.6v) x2
3. LED Lights x5
4. Wire connectors x15
5.Staple Gun x1

Figure 1.1 (Front view of box)

Figure 1.2 (Close up of right half of the inside of the box)

Figure 1.3 (Close up of left half of the inside of the box)

Figure 1.4 (Top view of the box)

Figure 1.5 (Right Side View of the box)

Figure 1.6 (Left Side View of the box)


 Figure 2.1 Circuit diagram 1

Figure 2.2 Circuit diagram 2


Procedures: 
1.Drill 3 holes of diameter  1.5 cm  on the top of the wooden box, 2 close to the corners and 1 opposite of them.

2.Drill 1 hole of the the same diameter of 1.5cm on the right side of the opening, 15 cm away from the left and  45cm from the bottom. 

3. Drill open 2 holes of  diameter 3cm on the left and right sides of the opening. On the left, drill it at  21 cm from the left and  12 cm from the top. On the right, drill it at 12 cm from the left and 30 cm from the bottom

4. Stick Velcro inside of the box, on all 3 sides:left, middle, right. On the left, stick the velcro 0.5 cm apart horizontally as the battery holders. On the middle side, stick 10 cm from the right and 33 cm from the bottom, stick the other 5 cm  from the right and  3 cm from the bottom, 1 for the hydro generator and 1 for the “toilet”. On the right side, stick 1 7 cm from the left and 3 cm from the bottom, stick the other 8 cm  from the right and 5 from the top. On the top of the box, stick 2 more velcro,3 cm from each other.

5. Take a container(opening facing the bottom), and cut a hole so as to fit a smaller one into it in the middle.Cut another hole of 2 cm by 2 cm on the bottom of one of the sides as the opening for the pipe.Drill a hole of diameter 1.5 cm to make the “toilet”.

6. Hot glue the containers together and place velcro on 2 adjacent sides. 

7. On all 4 of the hydro generators, stick the velcro on each of them so they can stay on the sides easier. 

8 .Hot Glue the shower head when its in the 3 cm diameter hole thats on the left side of the box. 

9. How glue the tap when its in the 3 cm diameter hole thats was drilled on the right side of the box. 

10. Connect a rubber pipe of  35 cm to the output of 1 hydro generator and a pipe of 105 cm to the input of it, then put the input pipe from inside of the box through the hole on the of the box which is closest to the opening. Fit the output pipe through the hole of 1.5 cm diameter on the right side of the box from inside to the outside of the box.Make sure the velcro on the hydro generator and the one on the wall are touching. Then connect the pipe to the tap from the outside which would be below it.

11. Connect a rubber pipe of  length  to the hole in the smaller container of the “toilet” and make sure it goes out of the hole of 2 cm by 2 cm on the side.

12. Connect a rubber pipe of  25 cm in length to the output of 1 of the other hydro generators and another of 120 cm in length to the input. Stick the velcro on the hydro generator to the higher one on the middle side inside of the box.Ensure that the input pipe goes to through the other hole thats in the corner from inside to the outside of the box. Leaving the last hole which was not in the corner on the top of the box open. 

13. Cut a pipe of  8 cm and connect 1 end of it to the output of 1 of the 2 remaining hydro generators and connect the other end to the input of the last hydro generator. Place the hydro generators onto the top of the box.  Cut at pipe of 30 cm and connect it from the output of the last hydro generator to the shower head from the outside. Connect a pipe of 100 cm in length to the input to the first of the last 2 hydro generators. Make sure that both velcro on the hydro generators are stuck with the 2 on the top of the box. 

14. Take the “toilet” and connect it to the corner of the middle and right wall on the inside of the box using the velcro. Then connect the output pipe from the second hydro generator mentioned to the pipe in the “toilet” using a pipe connector.

15. Using a staple gun, connect the wires along the sides of the box so as to keep the wires as far away from the water as possible and helps when connecting the circuit together. 

16. Use wire connectors to connect all 4 positive and negative wires from the 4 hydro generators together.

17. Solder the wires to the switch and and use wire connectors so the circuit would be as shown in figures 2.1 and 2.2.

Risk Assessment and Management. 
When using the soldering iron, we risk scalding ourselves as the soldering iron is hot. In order to melt the solder, we may also risk setting the box on fire. When using the glue gun, we also risk getting scalded as it needs high heat to function or even burns due to the hot glue itself. Drilling into the box causes saw dust to be in the area, which can enter out eyes and irritate them.
As our project uses electricity and water, we may be electrocuted if not handled properly. 

When using the soldering iron and the glue gun, we used gloves as an extra precaution and practice safe usage. When not in use, put the soldering iron in its holder and turn of the glue gun and soldering iron when not needed. When soldering, keep wood materials away as the heat may cause them to set on fire and our box is made of wood. When drilling, we will wear safety goggles to prevent irritation of our eyes. We also put the box on a stable surface so drilling the box would be safer, faster and have lesser risk of damaging any property. We will sweep away any saw dust collected and dispose fast to prevent it from going into the air. When using the electrical circuit and when building, we will keep the wires away from the water and make sure no electrical appliances are in contact with water. 

Data Analysis

(Trials) 
After construction, we will start testing if the system works by having an empty battery and one with some charge in it. We will be able to see if the empty battery charges as while the LED bulbs are lit up by the second battery, the first one would be charging when water is flowing through the any of the hydro generators, testing the “toilet”, tap and shower individually to make sure they all can charge the battery. Repeat this a 5 times within a week.

(Analysis of Data)
We will also test if the system can charge the batteries and that the charge in them does not disappear. We will charge the batteries using the system and connect each of them to a Volt sensor, both connected to a data logger which will then plot a graph on how the voltage has changed in the battery. We will then explain what the results were and what could have caused those to happen. From an average of 5 different sets of graphs, all about the change in the Voltage in the batteries.




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