Sine wave oscillator using LM741

The oscillators are the devices that generate oscillatory (AC) output from given DC input. There are different kinds of oscillators based on the output waveform they generate. Like ·         Sinusoidal oscillators – they generate sinusoidal (sine) wave output ·         Square wave oscillators – they generate square (or rectangular) wave output ·         Triangular wave oscillators – they generate triangle o ...

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Rechargeable Magnesium Batteries – Safer And Cheaper Than Li-ion Batteries

Researchers at the University of Houston reported in the journal Nature Communications the discovery of a new design that significantly improves the development of a battery based on magnesium. Magnesium batteries are considered as safe resources of power supply – unlike traditional lithium-ion batteries. They are not flammable or subject to exploding – but their ability to store energy is very limited. But ...

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PandwaRF, A Portable Radio Analysis Tool

PandwaRF, is a portable low-power RF device that captures, analyses and re-transmits RF signals via an Android device or a Linux PC. It uses Bluetooth (BLE) or USB connection to transmit data in a simple and fast way, comes in the form of a controllable housing from a smartphone or a computer. This pocket-size device operates at sub-1 GHz range, and it replaced the ‘standard SDR Grind’ of capturing, demodul ...

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ENFORCE SPEED LIMITS WITH A RUSTY BIKE

They say you can’t manage what you can’t measure, and that certainly held true in the case of this bicycle that was used to measure the speed of cars in one Belgian neighborhood. If we understand the translation from Dutch correctly, the police were not enforcing the speed limit despite complaints. As a solution, the local citizenry built a bicycle with a radar gun that collected data which was then used to ...

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AUGMENTED ARTHROPOD GETS A SELF-BALANCING RIDE

There are many people who find being around insects uncomfortable. This is understandable, and only likely to get worse as technology gives these multi-legged critters augmented bodies to roam around with. [tech_support], for one, welcomes our new arthropod overlords, and has even built them a sweet new ride to get around in. The build follows the usual hallmarks of a self-balancing bot, with a couple of in ...

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A LASER CUT GINGERBREAD CATHEDRAL

One of the more disappointing news stories of 2019 was the fire at the Notre Dame cathedral. Widely considered a building of great historical importance and architectural merit, it was heavily damaged and will take significant time and resources to repair. Fundamentally though, if you’re reading this, that’s probably someone else’s job. Instead, why not just build your own Notre Dame out of gingerbread at h ...

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3 Phase AC Motor Controller

This project made using MC3PHAC from NXP Semiconductor. The project generates 6 PWM signals for 3 Phase AC Motor controller. It’s very easy to make professional VFD combining with Intelligent Power Module (IPM) or 3 Phase IGBT/MOSFET with Gate driver. The board provides 6 PWM signals for the IPM or IGBT Inverter and also brake signal. Also this board works in stand-alone mode and doesn’t require any softwar ...

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Affordable DNA Detection Using A Smartphone

Researchers at UCLA have developed an improved method to detect the presence of DNA biomarkers of disease that is compatible with use outside of a hospital or lab setting. The new technique leverages the sensors and optics of cellphones to read light produced by a new detector dye mixture that reports the presence of DNA molecules with a signal that is more than 10-times brighter. Nucleic acids, such as DNA ...

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SPI Isolation Board

The isolated SPI module is designed for applications, where SPI signals need to be transferred over longer distances than usually. It is based on Linear’s LTC6820. The board is designed as two layer stack-up, with GND plane on the bottom layer and signal traces and components at the top layer. Signals and power are supplied over standard 100mil (2.54mm) pitch IDC header. Specification Dimension: 40.005 mm x ...

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Helios4 – The World’s 1st Open Source NAS

Helios your Own Private Cloud Helios4 is a Network Attached Storage or NAS - a smart box with up to 4 hard drives designed to store Family Photos, Music playlists, and Movie collections by connecting to your Home network. Program movie download & Get Fast access to Videos, Pictures & Music from any device. Share your photos & files and let friends and family access them anywhere, anytime... Prot ...

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eInk DIY weather station project

Makers, hobbyists and weather enthusiasts interested in building their very own DIY weather station may be interested in the new project featured on the Adafruit Explore & Learn portal. The new guide provides a method of creating a no-solder, Internet-connected ePaper weather display that escape full of displaying weather symbols, temperature, date and more. Project uses the Adafruit Tri-Color ePaper Sh ...

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DESKTOP WEATHER MONITOR LEAVES NOTHING TO CHANCE

[Mirko Pavleski] has put together a little weather station for himself that combines Internet-sourced forecasts with physical sensor data to give him a complete view of his local conditions. There’s no shortage of weather applications for our smartphones and computers that will show us the current local conditions and the forecast for the next couple of days. It’s so easy to pull weather data from the vario ...

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