Modified tDCS Machine

Yaniv G., Emily G., Braeden S.

Current Solutions to Increase Focus- Caffeine - Adderall- Calming Music- Excercise - Group Study- 5th floor library

Background Info-Funded by DARPA -Pilots & Snipers -300 tested-2mA

http://tdcsplacements.com/placements/accelerated-learning/

Target MarketsThose seeking to improve focus:-students-adults active in employment-military-senior citizens that meet requirements** should not be used for extreme ages**

Design Requirements

I. 2 -4mA short circuit current between gel pads II. weigh no more than 3 lbs III. smaller than 5 x 3 x 2 in^3 IV. Works for at least one year before batteries must be replaced V. On/off switch must be accessible from outside casing VI. Battery casing must be separate from circuitry casing

Original Circuit Design

Design Idea 1

Design Idea 2

Design Idea 3

Decision Matrix

Criteria Weights for Criteria (%)

Design 1 (pouch)

Design 2 (belt clip)

Design 3 (arm band)

Usability and Comfort

25 2 1 1

Size (dimensions)

10 1 1 2

Cost 30 3 2 1

Battery Life 10 2 2 2

Style 25 2 2 3

Totals (# x %) 100 2.2** 1.65 1.7

Prototypes

Testing Steps

1.Simulate Circuit in LTspice

2. Build device and flip switch to check if LED

(D4) would light up.

3.Use Multimeter put in current detect mode

to check for 2mA-4mA current.

Final Device

Final Device

Future Plans-Develop improved casing-Conduct live tests (animal testing)-Conduct human trials-Communicate with DARPA about design incorporation-Communicate with FDA

Questions?