Wearable sensors analyze your sweat
https://www.electronics-lab.com/wearable-sensors-analyze-your-sweat/
Engineers at the University of California are focusing on measuring Sodium, Potassium, Glucose, Lactate in an attempt to measure an individual’s health. The team have developed a prototype that comprises a flexible printed circuit board holding five sensors. A new device is able to calibrate the data based on skin temperature and transmit the information wirelessly in real […]
28.8MHz TCXO with +-1ppm Stability
https://www.electronics-lab.com/28-8mhz-tcxo-with-1ppm-stability/
Craig document his process of building a Better RTL-SDR TCXO with +-1ppm stability over 0C-55C range. Its hard to beat the cost and versatility of the ubiquitous RTL-SDR dongles, but the temperature stability of their reference oscillators isn’t sufficient for some applications. While the internal 28.8MHz quartz crystal in these units can be replaced by a high […]
Using Low Cost Hardware to Enhance the User Experience
https://www.electronics-lab.com/using-low-cost-hardware-to-enhance-the-user-experience/
Ken Boak discuss how to build a graphic user interface using cheap TFT toughscreen displays. This article is about using their lowcost graphics co-processor IC to provide a neat user interface for any low-end microcontroller. These days, when you can buy a 7″ tablet for $50, there is all the more reason for makers and hackers […]
Generating Analog Voltage with Digital Circuit
https://www.electronics-lab.com/generating-analog-voltage-with-digital-circuit/
Maurizio show us how to generate an analog voltage using a microcontroller and some resistors. The purpose of this article is how to generate analog voltage with digital circuit. Although the market provides today a very broad range of dedicated digital-to-analogue converters, putting such a device in the schematic has a negative impact on the […]
Arduino Auto Power off. Make Arduino power off itself!
https://www.electronics-lab.com/arduino-auto-power-off-make-arduino-power-off-itself/
In this video educ8s.tv show us how to make Arduino power off itself with the help of a simple circuit! If you have watched some of my previous videos you will know that I like my projects to have minimal power consumption so that we can use them with batteries for a long period of […]
An almost-GHz active differential oscilloscope probe
https://www.electronics-lab.com/an-almost-ghz-active-differential-oscilloscope-probe/
Christer wanted to see how a 500MHz differential clock was behaving so he decided to build an active probe. To simulate the circuit he used TINA spice software and documented the process in three parts on his website. What I really wanted was an active differential probe which should be able to look at […]
Easy Arduino Menus for Rotary Encoders
https://www.electronics-lab.com/easy-arduino-menus-for-rotary-encoders/
SimonM83 has posted a new tutorial on how to implement an Arduino menu using a rotary encoder. The tutorial goes through the hardware setup and sample code is provided. Rotary encoders with centre-push buttons are cool input hardware for projects, especially if you want to be able to scroll through menus and select options. Hopefully […]
Polyphonic Synth Cable
https://www.electronics-lab.com/polyphonic-synth-cable/
Polyphonic MIDI Synth on an ATtiny2313: This is the fourth synthesizer cable I’ve built, the first three being based on the ATtiny85. I have been looking into ARM chips but haven’t gotten to grips with them just yet. Instead, I decided go back to the ATtiny2313, which has a quarter of the memories of the […]
Elektor 500ppm LCR meter case tips
https://www.electronics-lab.com/elektor-500ppm-lcr-meter-case-tips/
NopHead wrote a review of Elektor 500ppm LCR meter: I recently bought a 500ppm LCR meter from Elektor because I didn’t have anything for measuring inductors or the ESR (equivalent series resistance) of capacitors, both of which are important for modern electronics, particularly switch mode regulators that have become ubiquitous. It is also more accurate […]
Android app turns smartphones into a seismic network
https://www.electronics-lab.com/android-app-turns-smartphones-into-a-seismic-network/
Researchers at UC Berkeley (California) have developed an Android app that can detect vibrations from earthquakes using the standard sensors integrated into smartphones. Android app turns smartphones into a seismic network – [Link]