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Pulsar is a wireless heart rate monitor device without a chest strap! It communicates with iPhone 4, iPhone 4S iPhone 5, Motorola RAZR, etc over Bluetooth 4.0. Continuously monitor your heart rate without a chest strap!
Pulsar – Bluetooth Wireless Heart Rate Monitor - [Link]
Raj from Embedded Lab talks about constructing a reflective IR sensor with necessary instrumentation circuit to illustrate the principle of photoplethysmography as a noninvasive technique for measuring heart rate. This project uses the TCRT1000 reflective optical sensor to sense the blood variation in the finger tissue and outputs a digital pulse which is synchronous with the heart beat. The output pulse can be fed to either an ADC channel or a digital input pin of a microcontroller for further processing and retrieving the heart rate in beats per minute (BPM).
DIY Photoplethysmographic sensor for measuring heart rate - [Link]
The project is aimed at the elderly population and people suffering of cardiovascular diseases. The aim is the creation of a preventive device which would assess and inform of the heart risk. On the other hand, it is not a diagnostic device, able of diagnosing or classifying heart diseases. It is a preventive device, meant for informing of possible risk, while the patient has the responsibility of further pursuing diagnosis with a doctor.
Heart Risk Warner - [Link]
Holst Centre, imec and DELTA announce an innovative body patch that integrates an ultra-low power electrocardiogram (ECG) chip and a Bluetooth Low Energy (BLE) radio. This unique combination fuses power-efficient electronics and standardized communication, opening new perspectives for long-term monitoring in health, wellness and medical applications. The system integrates components from Holst Centre and imec’s R&D programs. It is designed in collaboration with DELTA and integrated in DELTA’s ePatch platform.
The ECG patch measures up to 3 lead ECG signals, tissue-contact impedance and includes a 3D-accelerometer for physical activity monitoring. The data are processed and analyzed locally, and relevant events and information are transmitted through Bluetooth Low Energy. The patch is capable of monitoring, processing and communication on a minimal energy budget. When computing and transmitting the heart rate, the entire system consumes a mere 280µA at 2.1V, running continuously for one month on a 200mAh Li-Po battery. When transmitting accelerometer data (at 32Hz) on top of the heart rate, the power consumption remains below 1mA in continuous operation, giving about 1 week of autonomy.
Innovative technology for an ECG patch - [Link]
This tiny little gadget comes from Swiss scientists who designed a blood-powered turbine that can fit in arteries and power internal electronics, such as a pacemaker (for the present) or a mathematic brain co-processor (for the near future). [via]
The heart produces around 1 or 1.5 watts of hydraulic power, and we want to take maybe one milliwatt. A pacemaker only needs around 10 microwatts
The first Blood-Powered Heart Turbine is here – [Link]
quinndunki.com writes:
While reading through Charles Platt’s excellent book Make: Electronics, I came across this nice little circuit for making a gentle pulsing LED. I built it for fun, and was struck by the “humanness” of the pulse, but couldn’t figure out what to do with it. Later I found a heart-shaped tag on some pants I had bought, and well, this is the result. I opted to use mainly scrap parts salvaged from various sources. I liked the hacky recycled feel that gave it.
I took Charles’ circuit, and added a second LED for some symmetry. The bob under the pendant is the power source. The pendant’s chain is part of the circuit, so the clasp becomes the on-off switch.
Beating Heart LED Pendant – [Link]
simoninns writes:
This project creates a RGB LED lit love heart which is controlled by a PIC12F683 microcontroller. I designed the project as a gift for my wife on our 15th wedding anniversary (since she puts up with my addiction to electronics I thought she deserved something in return!).
RGB LED Love Heart – [Link]
This is a LED Heart Valentine, but instructions are not in English. [via]
LED Heart Valentine – [Link]
A quick Electronic Design I did for my girlfriend this Valentines Day, 2010. It’s just a real simple multivibrator circuit, with the Q and !Q lines fed to a couple of output FETs. [via]
Valentines Day LED Heart Project – [Link]
Mrfixits writes:
This Valentine instructable shows a pair of Hearts that unite to become one! The homopolar motor is the simplest form of electric motor, consisting of a battery, a conductor, and a magnetic field. The flat Heart shape is the most basic of homopolar motors. The Heart with legs is the next most simple shape. With a little ingenuity, the two shapes can be combined to unite into one spinning body. In this Instructable, I show how to make this special 2-piece homopolar motor with a bass speaker, some coins, a battery and two pieces of copper wire. A neodymium magnet can also be used instead of the bass speaker and coins. This is a great display for Valentines Day…or any day of the year!
How-To: Valentine motor - [Link]
