TeleHealth Hardware
Contents |
OLPC TeleHealth Hardware
User:DyD has been working on designing (and learning everything needed to design) a TeleHealth Module for several months
EKG
Simple 3 lead EKG for arrhythmia, murmur, and trauma diagnosis. Also facilitates pedagogical exercises into
Hardware
Currently in design phases
Main Chipset
The AD8541/2/4 series op-amps fulfill the target specs perfectly.
Problems
- Current problems include tuning op-amps and prototyping.
Pulse Oximeter
An invaluable piece of medical equipment relaying information about pulse and oxygen saturation by analyzing the output of two filtered photodiodes in two different frequencies.
Hardware
Currently nonfunctional: design consists of two MAX4006 OpAmps(Designed for telecom photo-diodes) connected to an IR and a red filtered photodiode outputting a measurable voltage. A finger would be positioned between the photodiodes and a red and IR LED. The pulse oximeter operates on the theory that oxygenated an oxygenated hemoglobin have different absorption and reflection frequencies. The same principle can be applied to any other small organic molecule with identifiable spectra, with proper calibration.
Main Chipset
MAX4006 Op-Amp
Problems
Once again, op-amp tuning.
Stethoscope
A simple microphone and audio amplifier to pick up heart and lung sounds.
Hardware
- Button Mic
- Audio amplifier
- Shielded twisted-pair cable
- Mic plug
ADC
- MCU Specs
- Speed: 25+ MIPS
- 5 or more channels of ADC
- 10 or 12 bits of ADC
- 5V, 100ma or less
- USB
- Price, less than 6usd
- User:Mchua and User:Nlee have offered assistance
- BIG STRUGGLING POINT
- Looking at the C8051F321 until an alternative is found.
Power Supply
Due to the nature of medical instrumentation as necessitating high-precision power supply, some combination of a regulator chip, fuse, and smoothing capacitor are needed.
Main Chipset
LP2982
Hardware
- LP2982 5, 4.5, or 3v regulator
- Over-voltage protector
- Fuse
- USB Connector
- Shielding
What Can I Do?
- Provide talent, time, or treasure:
- If you have experience designing medical instrumentation, and are willing to mentor or assist high school age students...
- If you have extra time and are able to send emails, track down sample components, or raise awareness...
- If you don't know what to do with your old soldering iron, oscilloscope, or components collection...
