Final Design

Less resistance proves to be valuable

After a careful assembly, a new test strip was assembled in a way that would not cause a short circuit.  The problem before was that the entire strip of wire was painted in glue as it would get the LED's to stick.  With this test, the LED's were glued individually and the circuit was a complete circuit.  The first video is with a 2k resistor and the second video is a test without and resistor.

Another Trial Run

The group set up a four wire array this time with three rows of LED's using 48 lights

The array still on the rack

The first test with resistors - no visible light

The video shows the test with no resistors where it shorted circuited due to excessive glue.

This instrument can check to see if the circuit is complete

The instrument was not found until after the trial was complete and therefore was unable to effect the current trial, but will be used in subsequent assemblies.  Moving forward the group will see how many rows that are able to be done and then calculate what resistor is needed so that the LED's are not burnt out.

A First Trial Run

A Work in Progress of the Attempt to Build Two  Parallel Strips

 The Completed Two Strips (They were on, the resistor inhibited too much)

The Powered on Strips - A Successful Trial (Removed resistor)

This trial was a success and it was discovered that the resistor (51k Ohm) inhibited the LED's entirely too much and after its removal, the LED's seemed to work a lot better.  The uninhibited trial generated 1350-1400 Lux with 10 LED's (unit of luminescence)

We Have Numbers!

After making measurements in the lab it has been determined:

1. 6.5 cm of wire has 3 ohm resistance
• When the length was 26 cm, the resistance was almost directly proportion at close to 12 ohm
2. The Lilypad generates 5.18 volts of electricity 
3. When 150k resistor is used with 5.18 volts the current through the wire is 341.33 milliamps (V/R = I)
• 200 LED's would draw 6.8 milliamps
• 300 LED's would draw 30.0 milliamps
• 1000 LED's would draw 102.4 milliamps

An Example of Threading and an Additional Material

Two Different Angles of the the Threading for the Bandage

51k Ohm Resistor

Project Materials

The conductive thread that will be patterned in the design below alternating between negative and positive threads.

The battery for the bandage that connects to the Lilypad power device below

The Lilypad which lets the battery power the LED's

The conductive epoxy which will be used as the glue for this project

The string of LED's

The frame where the bandage will be weaved on