Design Concept & Technical Requirements Chest Component

Required Functionality Determines heart rate continuously Records EKG statistics Records body temperature Determines if user suffers a severe impact e.g. falls, vehicle collisions Communicates information to wrist component Central processing unit interprets data and determines if there is need for medical assistance

Technical Requirements Ideal weight range g – About the weight of a men’s shirt Ideal power usage 4-6W – The same usage as an iPhone 4G – With an equivalent battery, should only require charging at night No more than 2cm thick – Will be nearly invisible underneath a sweater or a loose shirt Under $100 to make

Exterior Design Primary Electronic Components in Plastic Casing Adjustable Elastic Band Optional Shoulder Supports

Necessary Components EKG Sensors Accelerometer Thermometer CPU, Communications iPhone CPU, Components

Power, Weight Breakdown Power 4-6W – EKG - approx. 50mW – Accelerometer < 25mW – Processing (at 1GHz) - approx. 4W Weight g – EKG - approx. 17g – Accelerometer < 1g – Thermometer < 1g – Processor and wireless transmitter < 50g – Plastic casing, straps < 100g – Battery < 100g Research paper on low-cost, low-weight EKG sensors and tech: w10/readings/PCB+06.pdf

Cost Breakdown EKG sensors and module – Most expensive component and based on current retail costs can run up to $75 to produce. – Maybe have redundancies with processor than can be reduced Wireless technology, processor – The costs of these components have all been driven down due to mass manufacturing in smart phones. On one chip, these will probably cost only $30 to mass produce. Accelerometer, Thermometer – Less than $0.50 to buy Straps and casing – Less than $2 to make/ buy EKG Sales (pricing info): sensorwith-wrist-straps.html iPhone information: datasheets-componentschematicsdiagram-and-info/

Risks Cost – The biggest risk to this project is the cost of the components The EKG equipment is extremely expensive Further research may be required to eliminate cost by reducing redundancy with central processor – Processor Ideally, we will be able to use components like wireless technology, accelerometers, flash memory and CPU that have been driven down in cost by the production of smart phones Power – Integration of components may require more power than anticipated Battery may end up being bulky, heavy or expensive