Final Project: IMPLEMENTATION

Implementation phase

Starting from the initial concept a lot of things i change now in my final project. A lot of things i learnt in these five months. For this reason, now I have refined and radically redesigned my idea. I think OBike is now a more (almost) feasible project. First of all, after the electronics design lessons I totally re-designed the case which contains all the electronics parts. Now the case is a compact box which contain two sensors and a Bluetooth module (infrared for measuring safety distance and a Co2 sensor). The case and bike mount will be 3D modeled and 3D printed. The second important thing is related to the basic version of a Obike mobile APP. I will use Python for interaction design and Kivy to create the Android Mobile Application. At this moment, the estimated cost to realize the first prototype of OBike is 50-60 euros. Finally a possible implementation of this project can be based on the concept of Smart Citizen Kit.



General concept

Obike Components

Obike Case Concept
First Electronics conceptual scheme

Case Studies

Copenaghen Wheel
Lapka
Smart Citizen Kit
Twine

Materials and component


Below a detailed list of materials to create Obike:

  1. Battery 9V
  2. Module CO2 sensor MQ-135
  3. BLE Bluetooth module HM10
  4. Max Sonar MaxBotix Ultrasonar

DIY Bluetooth Board:

  1. N.6 Resistors 10K
  2. N.1 Led
  3. N.1 Switch Buttons
  4. N.1 Capacitor 1uf
  5. N.6 Pinheaders

TX/RX Converter:

  1. n.2 Transistor MOSFET ON Semiconductor 2N7002ET1G, canale N, SOT-23, 3 pin
  2. N.4 Resistors 10K
  3. N.7 Pinheaders

    4. Supply Converter:

    1. Low Dropout Voltage Regulator LP2985-33DBVT, 0.15A, 3,3 V, ±1.5%, 2,2 → 16 Vin, SOT-23, 5-Pin
    2. Low Dropout Voltage Regulator NCP1117ST50T3G, 2200mA, 5 V, ±1%, Massimo 20 Vin, SOT-223, 3-Pin
    3. N.2 Capacitors 10uf
    4. N.2 Capacitors 1uf
    5. N.8 Pinheaders

    Process and machine tools

  4. OBike case and bike mount: 3D printers
  5. Electronic Design: Desktop Milling machine (for boards)

    6. Softwares

  6. Electronic Design: Eagle/Kicad and Fabmodules
  7. Application: Python
  8. 3D printing: Rhino and Cura
  9. Application: Python and Kivy

    10. Tutorials

    Gas Sensors tutorial
    GPS in Kivy
    GPS in Kivy
    A timer in Kivy