Workflow of Assignment:

What will it do?

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My device will be installed as part of Grey water system at Vigyan Ashram. The grey water system has different water tanks and stages of filtration. The essential part is where the water is shifted from the last tank to the first tank. My device will sense the water level in the first tank and send the data on Thingspeak cloud service.

Importantly, the Grey water system can be disturbed because of power cut, breakage in pipe line from last to first tank or motor malfunctioning. If the system doesn’t work well because of any of these reasons, my device buzzer will ring alarm and it will also be reflected in graph on Thingspeak.

Who’s done what beforehand?

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My device is for particular application of Grey water system. The device solves the specific problem and there is no such device in the market. At the same time, I have referred previous projects. There is no project with this application. So, it’s a unique device to solve the specific challenge of Grey Water system.

Grey water system is new at Vigyan Ashram. There is no such device to send data on cloud and confirm that the entire system is functioning well. My device will prove a crucial help to the grey water.

Fig. Grey water system is at Vigyan Ashram.

What will you design?

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1. Eagle software (Final project PCB design):
I will be using Eagle to design embedded microcontroller board for interfacing and programming.

2. 3D Software (3D printed case for float sensor):
In Solidworks, I will design the outer body of my project and the case to fit the pipe which will hold the float sensor.

2. 2D software (Acralic case design):
I am using Laser cut to cut acrylic material to make the outer body of my project. This will prevent water from getting inside and make the device sturdy. All the electronics is inside the acyrlic case keeping the connections safe and tight.

What materials and components will be used? Where will come from? How much will they cost?

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1. ESP8266 Wifi Module:
The ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor.
I'm using this wifi module in my project, because I want to share data on cloud.

Fig. ESP8266 Wifi Module(Source: Google image).

2. Thingspeak Cloud Service:
ThingSpeak is an IoT analytics platform service that allows you to aggregate, visualize, and analyze live data streams in the cloud. You can send data to ThingSpeak from your devices, create instant visualizations of live data, and send alerts using web.
More learn about Thingspeak for IoT data analysis:Thingspeak Cloud Service

Fig. Thingspeak Cloud Service(Source: Google image).

3. Buzzer:
A buzzer or beeper is an audio signalling device, which may be mechanical, electromechanical, or piezoelectric (piezo for short). I'm using 5 vold DC buzzer in my project for alarm purpose.

Fig. Buzzer(Source: Google image).

4. Float sensor:

A float switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or other device. I'm going to use 'water float sensor' in water pipeline, because I want ankonwledge about water pump is ON or OFF OR how many times water pump ON and OFF. This sensor is working on 5 volt dc supply and it requires very low current. Also cheap in cost.

Specifications:
Cable Length: 30.5(cm)
Maximum Load: 50 W
Max Switching Voltage: 100V DC
Minimum Voltage: 250V DC
Maximum Switching Current: 0.5 A
Max Load Current: 1.0 A
Max Contact Resistance: 0.4 ΩTemp Rating: -20~ 80 degree
You can buy it from Amazon.com

Fig. Float sensor(Source: Google image).

5. Atmega 328p microntroller:
ATMEGA328P is high performance, low power controller from Microchip. ATMEGA328P is an 8-bit microcontroller based on AVR RISC architecture. It is the most popular of all AVR controllers as it is used in ARDUINO boards.
You can download datasheet from Here:Datasheet of Atmega 328p uC

Fig. Pin configuration and package of Atmega 328p uC (Source: Google image).

6. Miscellaneous (resistors, capacitors, connectors, wires):

7. Acrylic sheet:
Sporting equipment, stadium design, and even watercraft manufacturing can all benefit from acrylic sheet. Acrylic sheet, because of its impact and corrosion resistance, is an ideal choice for boat windshields, sporting venue windows, and even facemasks or eye protection.

Fig. Various acrylic sheet (Source: Google image).

8. Power adapter:

Fig. Power adapter(Source: Google image).

Most of the material is available in the lab. My device will not cost more than 1500rs.

What parts and systems will be made?

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1. PCB with wifi module and buzzer
2. 3D Print case to fix float sensor at the end of pipe.
3. Acrylic outer body for packaging

What processes will be used?

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1. PCB milling
2. Laser Cutting
3. Vinyl Cutting
4. Soldering
5. 3D printing

What questions need to be answered?

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I have searched and come up with a lot of float sensors. I still have doubt to decide which one will be the best suited for my device.

Other major doubt in my mind is whether checking the water level be the right parameter to decide the optimum functioning of the grey water system.

How will it be evaluated?

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The accuracy of the project can be evaluated by comparing the data of Grey water system on cloud with manually checking whether system is working. I will deliberately also switch off the system and cross check if cloud Thingspeak shows error.