August 1st, 2009

DIY Electronic Stethoscope

DIY Electronic Stethoscope

Mostly seen hanging on the doctor’s neck when ‘visiting’ the hospital or a medical clinic, but also used by every student that studies medicine, the stethoscope is perhaps the most common item associated with the medical profession, along with the white robe. It is primarily used for auscultation, which is listening to the internal sounds of the body, like heartbeats, but there are also engineering stethoscopes which are used for listening to internal sounds of various machines and other small-scale acoustic monitoring processes.

This electronic stethoscope is a very simple project with only a few parts needed. The idea is taking a broken ordinary stethoscope and modify it to have an electronic one. This project uses the Spy Ear iSpy-007 Sound Amplifier, a fun little gadget that costs $2.60 and is available for purchase at This is basically a 3 transistor amplifier with a microphone which gets attached to a short plastic tubing using heat-shrink tubing. The amplifier must be opened to have the stethoscope diaphragm attached to the microphone in a firm and secure manner, but once this is done the electronic stethoscope is complete. You just need an earphone and you’re ready to go.

A fun and quite simple project, this electronic stethoscope has a few advantages over an ordinary one because it possesses volume control. Also, it can be connected to a speaker and/or a PC, so more than one person is able to hear through it. Lastly, it’s easy to pack and carry around because the earphone is detachable.

DIY Electronic Stethoscope: [Link][via]

May 29th, 2009

Wearable Computing

Wearable Computing

Here we are one step closer to a future that’s starting to look more and more like Sci Fi movies. After I’ve seen Johny Mnemonic for the first time, i was wondering when will we be able to type or surf the net just by moving our fingers in the air on a invisible keyboard. Seems that day is closer than i thought thanks to the research done by Dr. Masaaki Fukumoto Executive Research Engineer at Docomo.

Dr. Fukumoto is researching ways to interface the human body and machine  and he managed to brake one barrier with a headset capable of reading the movement of the eye and use it to control other devices or applications. The headset measures the electrical potential of the cornea and tracks the eye’s movement. This is called electrooculogram in the medical field.

Using common electronics components in building this headset, Dr. Fukumoto can control the functions of a media player just by moving his eyes or making a camera focus on whatever his eyes are looking at. Although more research must be done before this technology becomes reliable, Dr. Fukumoto says we could see this technology on the market in a few years.

Wearable Computing: [Link][Via]

PO Box - Just Another Oximeter

The PO Box is a dsPIC30F2012-based pulse oximeter that can be used by medical professionals and home healthcare providers to measure a critically ill patient’s arterial oxygen saturation. A small mezzanine board interfaces to a sensor and serial port. A 2 × 8 character display provides SPO2 and heartbeat data.

PO Box – Just Another Oximeter:

Electronics Stethoscope With Pulse and Temperature Readings

In my opinion a very original idea, because I’ve never seen a eletronic stethoscope. And besides the originality you’ve got functionality which is great. The stethoscope gets the sound trough a microphone place inside the classic stethoscope sensor. The temperature and pulse are showed on a 3 digit 7 segment display.

Electronics Stethoscope With Pulse and Temperature Readings: [Download Project][View PDF]

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