Pseudo-Medical Monitor Hand-Held External Unit Design

UNIT
Device	Notes	Port Description	Connection Diagram
Hand-Held Grip and Reflex Sensor	Steady Hold Grip Strength User Response Switch Vibration Generation	Pin Mapping Line # Device Signal Function 1 3.3V Power 2 GND Power 3 MPU6050/ATTiny85 Token I2C-SDA 4 MPU6050/ATTiny85 Token I2C-SCL 5 MPU6050-INT GPIO 6 Vibrating Motor I/O GPIO 7 Momentary Push Button GPIO 8 Grip Sensor Analog

This Amazing, Affordable, Earth Changing Device, for which no endorsement is to be inferred, is designed as a shot in the dark.

Hand-Held Grip and Reflex External Unit

Components and Materials

General Components
Device	Name	Use
	Momentary Switch	Provide user response
	Vibrating Motor	Provide sensory input to user
	ATTiny85 Token	Identify External Unit to Main Unit
	Single RJ45 Port	Connection to Main Unit
	Foam Sheet	Outer Cover
	Copper Tape	Conductive surface for Velostat sheet readings
	Polycarbonate Tube (Size/Length/Diameter/Thickness varied according to use)	Grip Structure

Sensors

Sensors
Device	Name	Description	Interface
	MPU6050 6 DOF Micro Electro-Mechanical Systems (MEMS)	3-axis Accelerometer and 3-axis Gyroscope	I2C Address 0x68 or 0x69
	Velostat Pressure-Sensitive Conductive Sheet	Resistance measurement between points

Wiring

Sub-Assembly	Elements	Schematic
Hand Held Unit PCB	MPU6050 Vibrating Motor Circuit Velostat Wrap Copper Rings Momentary Switch ATTiny85 Token

Assembly

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Build

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