Application & Implications
- See Final Project Requirements for a complete list of requirements you must fulfil.
- The answers to the questions below will allow you to create your BOM (Bill Of Materials).
Spiral 1: H2 Power Meter
What will it do?
The H2 Power Meter is a handheld fuel cell monitoring kit - measuring power, current, voltage. This spiral one prototype measures DC Powered Devices. It works by receiving current, power and voltage data from the transmitter device wirelessly.
When data is received from the transmitter device. The display will be showing animation indicating any current, power, voltage changes in real life
Next iteration will include Hydrogen Fuel Cell integration, Pressure Transducer to measure the pressure left in the Hydrogen tank as the hydrogen is converted into energy with the fuel cell for every day use.
Who’s done what beforehand? What will you design?
There are power meter devices on the market like multimeter and an oscilloscope however I feel like it requires a certain learning curve to understand the values displayed on them. I decided to design a UI Friendly power-measuring tool aim to educate the residents of Hydrogen Village especially kids and youth to simplify their understanding of power consumption. This empowers anyone, regardless of electrical knowledge, to track and analyze their power usage - especially when it will be integrated with Hydrogen application.
Bill of Materials
| Category | Item | Amount | Link to Buy | Cost (Rp) |
|---|---|---|---|---|
| Microcontroller | Seeed XIAO ESP32-C3 | 1 | 87 000 | |
| Seeed XIAO ESP32-S3 | 1 | 126 000 | ||
| Input Device | INA219 Current Sensor | 1 | 31 000 | |
| Rotary Encoder | 1 | 6 500 | ||
| Output Device | TFT ILI9341 Display | 1 | 119 000 | |
| Electronic Production | FR1 PCB Board | 1 | 16 000 | |
| LED Diode 1206 SMD | 2 | 300 | ||
| RES 1K OHM 1% 1/4W 1206 | 2 | 1500 | ||
| Connector | Pin Header Female 1x40 Pin Single Row 2.54mm | 2 | 2400 | |
| Male to Male Jumper Cable | 2 | 900 | ||
| USB Socket - Female | 1 | 2 500 | ||
| Enclosure Design | PLA Filament (50g) | 1 | 13 950 | |
| Acrylic | 1 | 3 600 | ||
| Power Supply | Lithium-ion Polymer (LiPo) Battery 3,7V 2000mAh | 1 | 98 750 | |
| Total Cost | 509 400 | |||
| USD ($) | 31.16 |
What parts and systems will be made?
Bought:
- Current Sensor INA219
- TFT ILI9341 Display
- Rotary Encoder
Made:
- PCB Development Board
- Enclosure Design
What processes will be used?
- Additive Manufacturing: 3D Printing the enclosure
- Subtractive Manufacturing: Laser-cutting acrylic lid to the enclosure
- Electronic Design & Production
- Embedded Programming
- UI for H2 Power Meter Display
- Network Communication between Transmitter Board and H2 Power Meter
How will it be evaluated?
For spiral one, the H2 Power Meter could be considered successful when it recognises data from the transmitter device and display a UI animated reading. Another key parameter I want to test (after the prototype has been refined) is to test it with the residents of Hydrogen Village and gauge their understanding of this device and their knowledge on power consumption - before and after.
What questions need to be answered?
- Will it work with a Hydrogen Fuel Cell?
- Does it read data from transmitter device?
- Is it user friendly?
- Can people understand about power consumption using power meter?
- Is IDR509k considered ‘frugal’?
- The TX board at the moment has no enclosure so the attachment onto the Fuel Cell is still a missing piece. How do we ensure that end users know how to install the TX board to the fuel cell?
- Is my power meter accurate enough?
- Is it easy to produce at scale?
- Does my design make it easy to mass produce…in a Fablab?
- The plasticky device is still in its early stage of prototype. How do we produce at scale while keeping it frugal?
- will it survive usage in real world conditions?