9 Health Tech DIYs You Should Definitely Try!

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Do you love DIYing? Are you looking for new projects to make? Here’s bringing, 9 DIY projects on health tech with complete schematics, block diagrams, design guide and source files. Go ahead and try your hands on! Happy making!

Atithya Amaresh


1. Low Power EKG & Heart Rate Monitor using the MSP430FG439

This design details how to build a digital heart-rate monitor using a MSP430FG439 microcontroller (MCU). The heartbeat rate per minute is displayed on an LCD and generates a digital data stream via an RS232 serial port to allow EKG waveform display on a PC. The entire application runs using a CR2032 3-V lithium battery.

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2. Low Power Pulse Oximeter & EKG Reference Design

This reference design details non-invasive optical plethysmography – pulsoximetry – using the MSP430FG437 microcontroller (MCU). The pulsoximeter consists of a peripheral probe combined with the MCU displaying the oxygen saturation and pulse rate on a LCD glass. The same sensor is used for both heart-rate detection and pulsoximetering in this application. A custom LabVIEW GUI has been developed for this application to display the heart signal, heart rate and % SaO2 number. All the necessary files and steps to get this GUI up and running have been provided along with this report.

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3. A Low-power Battery-less Wireless Temperature and Humidity Sensor with Passive Low Frequency RFID

This design, featuring the ultra-low-power MSP430 MCU paired with a TMS37157 Passive Low Frequency RFID device can enable a ultra-low power wireless temperature & humidity sensor (SHT21). With RFID, applications can benefit from hermetically sealed enclosures by leveraging RFID to provide power and data transmission wirelessly through an enclosure. This design provides complete hardware, software & PC-side software to get you up and running.

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4. Data Acquisition Block for ECG Systems, discrete LEAD I ECG implementation Reference Design

This TI Verified Design is for Electrocardiography (ECG), the measurement of the electrical activity of the heart, a method that requires a precision analog front end instrumentation gain stage, filtering, and high resolution digital conversion. This design features the methodology for achieving a LEAD I ECG measurement system designed from discrete analog components. Ultra low power is optimized by an instrumentation front end using an OPA2333 and is digitized by the 18 bit ADS8881.

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5. Optical Heart Rate Monitor Reference Design with BLE Connectivity

This reference design is for a complete Optical Heart Rate Monitor wrist watch (no chest strap!) end equipment featuring TI signal chain, power, and connectivity components. With TI’s AFE4400 AFE, you can accelerate and simplify your wrist based HRM design while still ensuring measurement performance needed for serious Fitness designs. This reference design also includes a full BLE connectivity design for easy interface to BLE enabled smartphones, tablets, etc.

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6. Hand-to-Hand Body Composition Meter Reference Design with BLE Connectivity

This reference design is for a complete hand-held body composition or fat loss monitor end equipment featuring TI signal chain, power, and connectivity components. With TI’s AFE4300 body composition AFE, you can accelerate your body composition design to develop more quickly. This reference design also includes the full BLE connectivity design for easy interface to BLE enabled smartphones, tablets, etc.

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7. Pulse Oximeter via Finger Clip Reference Design with BLE Connectivity

This reference design is for a complete SPO2 Pulse Oximeter finger clip end equipment featuring TI signal chain, power, and connectivity components. With TI’s AFE4490 Pulse Ox AFE, you can accelerate and simplify your pulse ox design while still ensuring the highest of quality clinical measurements. This reference design also includes a full BLE connectivity design for easy interface to BLE enabled smartphones, tablets, etc.

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8. Body Weight Scale Reference Design with Body Composition capability and BLE Connectivity

This reference design is for a complete body weight scale end equipment with body composition capability featuring TI signal chain, power, and connectivity components. With TI’s AFE4300 weigh scale/body composition AFE, you can accelerate your body weight scale design or quickly add body composition measurement features to your existing platform. This reference design also includes the full BLE connectivity design for easy interface to BLE enabled smartphones, tablets, etc.

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9. Hardware Pace Detection for ECG Reference Design

This Verified Design outlines a hardware pace detection solution for ECG using slope detection. The circuit is designed to work smoothly with the ADS1298 through the PACEOUT pins from the ADC directly feeding the input of the pace detection circuit. When a pace signal is detected, the output from the circuit is designed to latch a logic signal high to be read from a GPIO.

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Author is a senior correspondent at EFY.

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