Category: Test/Measurements
Withings Body Cardio Teardown
Nick tipped us with his latest teardown of an advanced weighing scale. He writes: The Withings Body Cardio is the latest in the brand’s range of smart health-centered devices, and the second Withings product we’ve tackled in this series! It’s a smart scale with a pretty...
Continue ReadingTemperature alarm for boiling milk
Domen Ipavec shares his temperature alarm for boiling milk. Temperature alarm uses an Atmel attiny841 microcontroller, DS18B20 high temperature waterproof temperature sensor from adafruit, 2x16 HD44780 LCD and a buzzer to do its job. Anyone who has ever boiled milk on the stove...
Continue ReadingCapacitor self-diagnostics
Peter Demchenko discuss about a design idea on how to test capacitors in circuit. The electrolytic capacitor is far from being the most reliable electronic component. One of its failure modes – a gradual loss of capacity – can hardly be noticed until power supply malfunction...
Continue Reading12$ 30MHz signal generator using Arduino
A signal generator is an electronic device that generates electronic signals and waveforms. These electronic signals are either repeating or non-repeating as per the requirements and field of applications. It is generally used in designing, testing, troubleshooting and repairing...
Continue ReadingAnalog Capacitor ESR Tester
TallMan's lab @ runawaybrainz.blogspot.com build a nice looking and simple analog ESR capacitor meter based on a EEVBlog forum topic. I finally got round to making my capacitor ESR tester this week after finding a nice simple 5 transistor version by EEVBlog member Jay_Diddy_B....
Continue ReadingACS714-30A Current Sensor module
The Allegro ACS714-30A provides economical and precise solution for AC or DC current sensing in automotive systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switched-mode power...
Continue ReadingFFTs and oscilloscopes: A practical guide
Arthur Pini @ edn.com published a guide on how to use FFT found in most modern oscilloscopes. The FFT (Fast Fourier Transform) first appeared when microprocessors entered commercial design in the 1970s. Today almost every oscilloscope from high-priced laboratory models to the...
Continue ReadingApp note: Engineering scaling
Scaling large values to be fed on limited input digital meters, application note from Murata. [via] It is oftentimes necessary to attenuate “large” input signals down to a level that more closely matches the input range of a selected meter. For example, suppose the signal to be...
Continue Reading