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]
Measure small LCs with a scope
https://www.electronics-lab.com/measure-small-lcs-with-a-scope/
Here is a simple way to measure an unknown inductance by forming a resonance LC circuit and measure it using an oscilloscope. Glen Chenier writes: One of our technicians recently asked for help determining the value of an SMT inductor. It was unmarked, and was many turns of very fine wire on a ferrite core. […]
Measure Stress Levels Using a Smartphone
https://www.electronics-lab.com/measure-stress-levels-using-a-smartphone/
Researchers have developed a smartphone device that measures the cortisol concentration in saliva in order to define your stress levels. The new test is done in under 10 minutes and there is no need to send a salvina sample on a lab. The cost for each measurement is less than 5$ and the smartphone uses its […]
A biometric sensor for wearables – LG Innotek
https://www.electronics-lab.com/a-biometric-sensor-for-wearables/
LG Innotek has released an ultra-thin optical biometric sensor module designed to be used in wearables and smartphones to measure health parameters such as heartbeat, stress indicators and blood oxygen saturation level. The new sensor is more accurate than it’s predecessors achieving ±5 bpm range of error and consumes very little power to operate. At stable heartbeat […]
SolarBoost – Make Your Own USB Solar Mobile Charger
https://www.electronics-lab.com/solarboost-make-your-own-usb-solar-mobile-charger/
SolarBoost is an open source smart interface that allows you to build your own powerful and portable solar charger for your phone and other mobile devices. It has two USB ports and can provide 5V @ 2A at each of them and is controlled by a 8-bit 32MHz Microchip PIC microcontroller. It is also equipped […]
Ryet IKEA LED Bulb teardown
https://www.electronics-lab.com/ryet-ikea-led-bulb-teardown/
Here is a quick tear down of an IKEA 400 lm “Ryet” bulb. Cheapest bulb with full safety listing that I have ever seen. Selling for less than $2.00! Ryet IKEA LED Bulb teardown – [Link]