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Tongbo Huang
Wei Shi
Yifei Yao
Nancy Zhang
T-United
Second Presentation
By Nancy Zhang
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Status Update
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T-shirts that interact with each other by IrDA transceivers

LED displays that shows custom messages and graphs
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Parts ordered(total cost $180 for 3 set)
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IrDA Transceiver

P4 32X16 RG Bicolor LED Dot Matrix Unit Board SPI Like
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LilyPad Arduino 328 Main Board
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LilyPad Simple Power
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FTDI Basic Breakout - 5V
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Architecture
LED
irDA
LED
Net weight of the LED board= 250g / 8.9oz
irDA
LED
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Architecture continued for data transfer
Flash Memory16 KB
Input Voltage2.7-5.5 V
We’ll go for AAA for now
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Use Cases
client
Software
human
interface
Message sent
Type in
message
success
Message sent
Exceed memory
or failure
lilypad
LED display
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Use Cases
Tshirt 1
No signal
from right
Tshirt 3
Tshirt 2
No signal
from right
No signal
from right
No signal
From left
No signal
From left
No signal
From left
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Use Case
Tshirt 1
No signal
from right
Tshirt 3
Tshirt 2
I am #1
i got the
last one
i am #2
I am last one
No signal
From left
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Risks and mitigation

The shirt might get too bulky

We will first use the AAA
battery but later on we might
try using two button batteries

The shirt won’t be waterproof

We might add a shield to the
LED. Lilypad is already
washable.

IR transceiver might not work
as we expected

This need to be further
discussed

User find it hard to change the
text or image
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Try to design a more userfriendly interface