Ehvac: Wireless Modular Multi-Zone hvac controller Group b javier Arias Ryan Kastovich Genaro Moore Michael Trampler


Section 7: Administrative Content



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Section 7: Administrative Content




7.1 Milestone Discussion

In a project of this magnitude there must be a discussion of goals and timelines. A set of milestones has been created to keep the project on track and have progress made in a timely manner. Timelines have been set for each individual in the group such that they reflect the skill set and abilities of each member. These timelines include a start date, a work period, a review period and a completion time.


The timelines for each major section of the project has been laid out in such a way that all the above parameters have been defined. These major sections include the Remote Sensor Module (RSM), the Main Controller (MC) and the Web application.
There are many subsections within these top level sections that will be discussed. Starting with the RSM there are a few subsections that go into it which include but are not limited to the User interface, the Sensors, the Connectivity to the Main Controller and the PCB Design. The average time for all of these subcomponents is roughly 6 months which will include research, design and completion. If all goes as planned the RSM should be finished by the end of November.

The Main Controller includes many subcomponents within itself which require a large effort from the group to complete. These subsections will include the web server (Google App Engine), Connectivity (to the RSM), Vent Control, Safety Sensors, Fan controller, heat pump controller and the PCB Design. On average these subcomponents will take about 5-6 months to complete the research, design and completion phase. If all goes as planned these will be completed by the end of November.


The final aspect of the project that will be discussed is the Web application. More importantly the components of the web application are the Main controller interfacing, the user interface and the data logging. Although this section is rather small, the completion of these tasks will not be quick due to the extensive level of coding and testing involved. The expected date of finishing is around the end of October if all goes as planned. A more detailed representation of the Milestone can be seen in Figure 8.1-1.

7.2 Finance Discussion

After many discussions with the group it was perceived that this project would in fact be quite expensive. However, after researching for individual parts for the design of our MCU and RSM’s this price was slightly reduced. The budget the group felt made sense to be around $1500. The bulk of the project in reference to the budget will come with building all the parts associated with the Main controller and the radio frequency transceivers, the sensors as well as the processors. As seen in Tables 7.2-1 and 7.2-2 a rough draft of the parts the group will buy for the Main Control Unit and the Remote Sensing Modules.




Item

Quantity

Price (of each)

Apprx. Total

Stellaris Cortex-M3 Processor

1

$10.00

$10.00

PulseJack J1026F21C RJ45 Jack w/magnetics

1

$8.19

$8.19

CC2500 2.4GHz RF Transceiver

1

$4.00

$4.00

Crystal(s)

3

$5.00

$15.00

Socket 5-pin

1

$2.00

$2.00

Silicon Triacs

14

$1.00

$14.00

Screw Terminals 3.5mm Pitch (4-Pin)

4

$1.00

$4.00

74HC595N Shift Register (TSOP-16)

2

$1.00

$2.00

LEDs

2

$1.00

$2.00

Passive Components (RCL)

Alot

Varies

$100.00

2.4Ghz Monopole Antenna

1

$5.00

$5.00



Table 7.2-1 MCU Parts



Item

Quantity

Price (of each)

Apprx. Total

CC2500 2.4GHz RF Transceiver


1

$4.00

$4.00

Passive Components (RCL)


Alot

Varies

$100.00

Crystal(s)


1

$5.00

$5.00

Socket 5-pin


1

$2.00

$2.00

2.4Ghz Single-Pole Antenna


1

$5.00

$5.00

LEDs


2

$1.00

$2.00

Switch Momentary


3

$.50

$1.50

TI MSP430F2274 Microcontroller


1

$1.00

$1.00

Rotary Encoder


1

$3.00

$3.00

LCD

1

$15.00

$15.00

Op-Amp


1

$4.00

$4.00

CO2 Sensor


1

$15.00

$15.00

Humidity Sensor


1

$20.00

$20.00

AA Battery Holder


4

$2.00

$8.00



Table 7.2-2 RSM Parts




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