Remark UoA Template

# Energy Monitor
### ELECTENG 209

.TitleAuthor[Hao Lin, Krithik Lekinwala, Ankush Patel and Ruskin Swedlund]

---

.logo-slide[]
.footer[[Hao Lin, Krithik Lekinwala, Ankush Patel and Ruskin Swedlund](https://www.linkedin.com/in/authorname), Department of Electrical, Computer and Software Engineering (2020)]

---
# Introduction
- Home energy monitor to read voltage, current and power consumption
- Display information on a local 7-segment display and on a mobile using Bluetooth

---
name: S2

# Analog Design Considerations: Signal Amplification
- $50\%$ range increase for ADC input by optimizing resistors chosen in the differential amplifier
      - From $1.3\ V \leftrightarrow 2.9\ V$ to $0.9\ V \leftrightarrow 3.3\ V$

---
name: S3

# Analog Design Considerations: Peak Dectector
- Peak detected by sampling the voltage when an interrupt is triggered
  * Interrupt generated using an analogue circuit

.center[
<img src = "img/peakDetectorSchem.png" width="49%" />  
<img src = "img/peakDetector.png" width="49%" />
]

---
name: S4

# Software Design Considerations

- Our key focus was to procure <b>modular</b> and <b>efficient</b> code

---
name: S5

# Software Design Considerations

- Our custom `print()` function, which is built on top of our modular UART functions that automaticlly convert to 3 significant figures before transmitting

.codes[
```c
#define rmsvoltage 14.5
#define peakcurrent 125
#define power 1.60
int main()
{
	print("rms voltage is: %f", rmsvoltage);
	print("peak current is: %d", peakcurrent);
	print("power is: %f", power);
}
```
]

---

# Software Design Considerations

* Standard library `printf()` is just under a $kB$ in size

* Our custom `print()` function only consumes $244 \ bytes$
	* Thats over $70\%$ reduction in size

* Our custom print function retains all the convenient `printf()` syntax

.code[
```
[Firmware/]$ nm --print-size -t d FW.ELF | grep -w 'print\|printf\|vfprintf'
00003694 00000244 T print // 244 bytes 
00005880 00000040 T printf
00005920 00000934 T vfprintf // 974 bytes, 75% reduction
[Firmware/]$ 
```
]

---
name: S7

# PCB Layout
.center[
	<img src="img/netw/PCBLayout3DAnnotated.png" width="50%">         
  <img src="img/netw/PCBLayout2D.png" width="30%">
]
---
name: S8

# Project Management

- Workflow planning and task management using Slack and Trello

.center[
<img src='img/Trello.png' width='55%' />        
<img src='img/Trello2.png' width="30%" />
]
---

# Project Management

- Effective use of Git, rolling back when encountering issues with latest commit
- Python script reads makefile to generate Atmel Studio Project so we are not limited to Atmel IDE

<pre>
<code style="text-align: center">
+--------------+        +---------------+          +---------------+
|              |        |               |          |               |
|   Makefile   +-------->  genAtmel.py  +---------->  AtmelStudio  |
|              |        |               |          | Project Files |
+--------------+        +---------------+          +---------------+
</code>
</pre>
.
<img src='img/graph.svg' width='100%' />
.center[** Git Commit Graph **]
---

# Acknowledgements
#### Special thanks to Duleepa and the TA's 
#### for their valuable feedback.