Determining the state of our health has always been a matter of finding a way to monitor and measure the body’s most basic functions. Before instrumentation, visual indicators were used that allowed us to know, for example, what our body temperature should be, what a healthy pulse is, and what an acceptable respiration rate is. […]
Sensor Technology for Health and Fitness Applications Read More »
Features 2.25V to 5.5V Input Voltage Range ±1% Total Output Voltage Accuracy Over Temperature at VIN = 3.3V or 5V Single Resistor-Programmable Output Voltage PMBus Compliant Serial Interface: Programmable Output Voltage Margining: Up to ±25% VOUT Range with 0.1% Resolution Read back of Average and Peak Temperature, Current, and Voltage (25Hz Refresh Rate) Fault Status
LTC3815 – 6A Monolithic Synchronous DC/DC Step-Down Converter Read More »
Summary This project is a simple wrist mount digital altimeter which is a device used to determine altitude. This design uses atmospheric pressure to calculate the altitude of its location. The lower the atmospheric pressure, the higher the altitude. The project is comprised of a microcontroller (MCU), an 84×84 pixel graphic LCD and a barometric
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The ESP8266 chip, and the boards based around it, have been the new hot new thing this past year. Overnight it became — almost by stealth — one of the leading platforms for the Internet of Things. This runaway success quickly gathered a community, and it’s possible Espressif Systems may repeat that next year with their new ESP32 chip. About a
Meet ESP32, New Big Brother to IoT Board ESP8266 Read More »
I had a Planar 160×80 EL graphic display that’s been in my parts bin for years that I’ve always wanted to use, and this was perfect. Unfortunately it doesn’t have a controller so I had to interface it to the CPU with an Epson S1D13700 graphic controller. The display indicates speed from a GPS module,
Motorcycle custom instrument panel Read More »
Prometheus Prometheus makes real circuit boards in just minutes. When we’re prototyping, we need a tool that can give us nearly instant feedback – not feedback that comes in a few week’s time in the form of a PCB delivery. Let the PCB manufacturers make the hundreds or thousands of boards for your production run
Prometheus: Circuit Boards in Minutes Read More »
Badges are amazing things. Better when you make your own. I was about to attend the 1st MakerFest at NID, Ahmedabad and thought of taking something unique to the event. Badge was a great option and suited the maker theme of the event. So, sitting down with a pen and paper i drew what it
Open Badge: The LED Badge Read More »
The devices developed in the lab of Rice chemist James Tour are geared toward electronics and apparel. They are the subject of a new paper in the journal Advanced Materials. Microsupercapacitors are not batteries, but inch closer to them as the technology improves. Traditional capacitors store energy and release it quickly (as in a camera
Supercapacitors to replace batteries? Read More »
I have built a GPS Logger and it works very well to trace the drove route for two years. By the way, the navigation solution computed by GPS receiver itself has an excellent accuracy without DGPS because an intentional offset added by US goverment has been stopped several years ago. The position error seems to
Portable GPS Data Logger Read More »
This is an example of a simple and cheap milliohmmeter that can be made by every maker. The core of the circuit are a current source (LT3092) and a current sense (INA225): a costant current flows through the milliohm resistor under test and the voltage at the current sense output gives the value of the
