Mmm... smells like Chips!

My journey through my first hardware project as a software developer: The “Pookimeter” - A bad smells detector. Throughout the project I learned how to read hardware specs, burn a program to a very cheap chip, how to debug using a hardware simulator, and also the different components of the human gas extractions.

Transcript

1. Mmm… Smells like Chips! Diana Gastrin, RS2022
2. WHO AM I? Software Developer B.Sc. in Computer Science Side projects
3. Arduino Starter Kit
4. The Problem
5. The Problem
6. The Problem
7. The Pookimeter
8. The Pookimeter Code and Burn What is a Pookimeter? Hardware parts build it from scratch Software parts Debug Offline and Online 1 3 4 2
9. What is a Pookimeter
10. What is a Pookimeter Calibration mode ON / OFF Set 𝒎𝒊𝒏 and 𝒎𝒂𝒙 values
11. Human Gas Extraction Methane, 1.87 Co2, 417 Nitrogen, 780840 Clean Air Methane, 70000 Co2, 90000 Nitrogen, 590000 Pooked Air
12. Demo
13. Danse Macabre by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/by/4.0/ Source: http://incompetech.com/music/royalty-free/index.html?collection=005 Artist: http://incompetech.com/
14. The Pookimeter Code and Burn What is a Pookimeter? Hardware parts build it from scratch Software parts Debug Offline and Online 1 3 4 2
15. The Pookimeter Code and Burn What is a Pookimeter? Hardware parts build it from scratch Software parts Debug Offline and Online 1 3 4 2
16. Hardware parts Version 1 1 Arduino 1 Button Wires 1 Methane sensor 3 LEDs + Resistors 1 Breadboard
17. Hardware parts 3 Digital Pins
18. Digital Pull-up resistor Pin Hardware parts Pressed Low (0) Not Pressed High (1)
19. 1 Analog Pin Hardware parts 1 0 1 1 1 0 1 0 1 1 0 - 1023
20. Cheaper and Smaller
21. Hardware parts Microcontroller ATMEGA328-PU
22. 1 Analog 4 Digital PIC12F683 ATMEGA328-PU Hardware parts Microcontroller
23. Pookimeter V2
24. Hardware parts Version 2 1 Button Wires 1 Methane sensor 3 LEDs + Resistors 1 Breadboard 1 Microcontroller
25. Hardware parts Power supplier v1 9𝑣 Convert to 5v
26. Battery life https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-battery-life
27. Hardware parts Power supplier v2 9𝑣 Convert to 5v
28. Hardware parts Power supplier v3 5𝑣 Convert to 5v 𝑈𝑆𝐵 2.0
29. Hardware parts Version 2 1 Button Wires 1 Methane sensor 3 LEDs + Resistors 1 Breadboard 1 Microcontroller
30. Microcontroller PIC12F683 PIC12F683
31. Microcontroller PIC12F683 I/O Ports + -
32. Microcontroller PIC12F683 I/O Ports
33. Microcontroller PIC12F683 I/O Ports Methane Sensor
34. Microcontroller PIC12F683 I/O Ports Methane Sensor Push Button
35. Pookimeter V3
36. Hardware parts PCB Version 3 1 Button Wires 1 Methane sensor 3 LEDs + Resistors 1 Breadboard 1 Microcontroller
37. Creating a PCB
38. Creating a PCB Soldering Case printing
39. The Pookimeter Code and Burn What is a Pookimeter? Hardware parts build it from scratch Software parts Debug Offline and Online 1 3 4 2
40. The Pookimeter Code and Burn What is a Pookimeter? Hardware parts build it from scratch Software parts Debug Offline and Online 1 3 4 2
41. Code
42. IDE and Compiler IDE Compiler
43. Code
44. Code
45. Code
46. LOOP Methane Sensor value
47. LOOP Map value to 0 - 9 Mapped value Value
48. LOOP Map value to 0 - 9 GREEN LED 𝑣𝑎𝑙𝑢𝑒 < 4 ORANGE LED 4≤ 𝑣𝑎𝑙𝑢𝑒 < 7 ** RED LED 7 ≤ 𝑣𝑎𝑙𝑢𝑒 **
49. POOK
50. POOK
51. Issue
52. Issue
53. Issue
54. Issue
55. Issue
56. Solution A Hysteresis
57. LOOP Map value to 0 - 9 GREEN LED 𝑣𝑎𝑙𝑢𝑒 < 4 ORANGE LED 3 ≤ 𝑣𝑎𝑙𝑢𝑒 < 7 RED LED 6 ≤ 𝑣𝑎𝑙𝑢𝑒
58. Solution B Moving Average
59. Burn the code
60. Burn the code HEX file
61. Burn the code HEX file K150 PIC Programmer K150 PIC Driver
62. The Pookimeter Code and Burn What is a Pookimeter? Hardware parts build it from scratch Software parts Debug Offline and Online 1 3 4 2
63. Offline debug
64. Offline Debug
65. Offline Debug
66. PIC12F683 Data Memory Special function registers (SFR) General purpose registers (GPR)
67. Offline Debug
68. Online debug
69. Online debug See the current values in the code Do beautiful graphs with the data Understand the data
70. Online debug Information
71. Online debug Information
72. Online debug Information
73. Online debug Information MCP2221 (Adafruit)
74. Online debug Information MCP2221 (Adafruit) Python
75. Online debug Information MCP2221 (Adafruit) Python Asynchronous serial protocol
76. Online debug Send 23 (00010111) 20 ms init 5 ms for 0 10 ms for 1
77. Online debug Time Mapped value
78. Online debug Time Mapped value
79. Online debug Time Mapped value
80. Online debug Time Mapped value
81. The Pookimeter Code and Burn What is a Pookimeter? Hardware parts build it from scratch Software parts Debug Offline and Online 1 3 4 2
82. One more thing…
83. Thanks! @gastrin_diana