Pseudo-Medical Monitor EKG External Unit Design

UNIT

Device

Interactions

Port Description

Connection Diagram

EKG-Respiration Unit

Pin Mapping
Line #	Device Signal	Function
1	3.3V	Power
2	GND	Power
3	NeoPixel Controller	I2C-SDA
4	NeoPixel Controller	I2C-SCL
5	Respiration Detection	Analog
6	Respiration Detection Adjust	Analog
7	N/C	Analog
8	Heart Beat Signal	Analog

This Amazing, Affordable, Earth Changing Device, for which no endorsement is to be inferred, is designed against advice of counsel.

Hand-Held Grip and Reflex External Unit

Items
Device	Use
	Amplifies and sets threshold for Breathing Sensor Type A
Signal Amplifier Box	Encase Signal Amplifier and Adjustment PCB
ATTiny85 Neopixel Token	Provides Pacing LED
RJ45 Port	Provides connectivity to Main Unit
Medical Leads	EKG Leads
Cabling	Electrical wiring and as inner telescoping tube in chest band assembly
Flexible Tubing	Chest band assembly as exterior telescoping tube to set tightness for breathing sensor
Project Box (variants)	Enclosure

Sensors
Device	Description	Interface
Breathing Sensor Type A	Detect breathing thru compression of sensor between chest and an encircling band	Analog Voltage Output
EKG Monitor	EKG based on BioAmp EXG Pill Excellent Hackaday.io Project by Deepak Khatri	Analog Voltage Output


Sub-Assembly	Elements	Schematic
	IR Pulse Sensor (resistor values modified)
	TL072 Op-Amp Pulse Sensor included in schematic
	BioAmp EXG Pill variant
	ATTiny Neopixel Token

Sub-Assembly

Elements

Breathing Sensor Type A

Craddle

Renders
	Two Compression Brackets IR Pulse Sensor used as Distance Compression Sensor Inside
	BLUE - Compression Sensor Orientation Stabilizer YELLOW - Compression Sensor Bracket Oriented as Lower GREEN - Compression Sensor Bracket Oriented as Upper CYAN - Telescoping Tube Cradle RED - Rubber Band (Provides Flexing of Compression Sensor Brackets) VIOLET - Fastner (Holds Exterior Telescoping Tube Secure and Allows Inner Tube to Move) SEMI-TRANSPARENT GREEN - Outer Telescoping Tube (Inner Telescoping Tube visible)