Author Archives: Fernando Gomes

Balance Box Game Requires A Steady Hand

In the distant past, engineers used exotic devices to measure orientation, such as large mechanical gyros and mercury tilt switches. These are all still useful methods, but for many applications MEMS motions devices have become the gold standard. When [g199] set out to build their Balance Box game, it was …read more

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Posted in Arduino Hacks, balance, MEMS, mpu6050 | Leave a comment

“The Thing”: A Homemade FPGA Board

The Thing is an unassuming name for an ambitious project to build an FPGA board from easy to find components.

The project stems from an earlier build submitted to the 2018 Hackaday Prize by [Just4Fun] where two dev boards – an STM32-based Arduino and an Altera MAX II CPLD board …read more

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Posted in 2019 Hackaday Prize, fpga, Hackaday Prize | Leave a comment

Worried About Bats in your Belfry? A Tale of Two Bat Detectors

As somebody who loves technology and wildlife and also needs to develop an old farmhouse, going down the bat detector rabbit hole was a journey hard to resist. Bats are ideal animals for hackers to monitor as they emit ultrasonic frequencies from their mouths and noses to communicate with each …read more

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Posted in ArduBat, bat detector, digital audio hacks, Hackaday Columns, misc hacks, ultrasonic | Leave a comment

Coandă Effect Makes a Better Hovercraft than a Quadcopter

Leaving no stone unturned in his quest for alternative and improbable ways to generate lift, [Tom Stanton] has come up with some interesting aircraft over the years. But this time he isn’t exactly flying, with this unusual Coandă effect hovercraft.

If you’re not familiar with the Coandă effect, neither were …read more

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Posted in BLDC, coanda, coanda effect, fan, foam core, hovercraft, lift, misc hacks, propulsion | Leave a comment

Worn Out eMMC Chips are Crippling Older Teslas

It should probably go without saying that the main reason most people buy an electric vehicle (EV) is because they want to reduce or eliminate their usage of gasoline. Even if you aren’t terribly concerned about your ecological footprint, the fact of the matter is that electricity prices are so …read more

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Posted in car hacks, Current Events, electric vehicle, Embedded Linux, Engineering, Featured, flash storage, intel atom, linux, linux hacks, log files, Original Art, slider, tegra, tesla, wear-leveling | Leave a comment

Painting with Light: The Homemade Pixelstick

Light painting has long graced the portfolios of long-exposure photographers, but high resolution isn’t usually possible when you’re light painting with human subjects.

This weekend project from [Timmo] uses an ESP8266-based microcontroller and an addressable WS2812-based LED strip to paint words or custom images in thin air. It’s actually based …read more

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Posted in addressable led, Arduino Hacks, ESP8266, led hacks, light painting | Leave a comment

The Smallest Homebrewed TTL CPU In the World

The may very well be the smallest homemade TTL CPU we’ve ever seen. Measuring at one square inch, this tiny chip boasts 40 connections, an 8-bit databus, a 16-bit address bus, a 64 kB memory space, reset and clock inputs, and 5 V power lines.

TTL (transistor transistor logic) logic …read more

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Posted in 2019 Hackaday Prize, cpu, Hackaday Prize, hardware, Tech Hacks | Leave a comment

RTFM: ADCs and DACs

It’s tough to find a project these days that doesn’t use an analog-to-digital converter (ADC) or digital-to-analog converter (DAC) for something. Whether these converters come as built-in peripherals on a microcontroller, or as separate devices connected over SPI, I2C, or parallel buses, all these converters share some common attributes, …read more

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Posted in adc, analog, calibration, converter, dac, digital, DNL, Engineering, Hackaday Columns, INL, Original Art | Leave a comment

DIY Video Microscopy

Owning a Microscope is great fun as a hobby in general, but for hackers, it is a particularly useful instrument for assembly and inspection, now that we are building hardware with “grain of sand” sized components in our basements and garages. [voidnill] was given an Eduval 4 microscope by a …read more

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Posted in hardware, microscope, optical microscope, raspberry, Raspberry Pi, Raspberry pi camera | Leave a comment

Pack Your Bags – Systemd Is Taking You To A New Home

Home directories have been a fundamental part on any Unixy system since day one. They’re such a basic element, we usually don’t give them much thought. And why would we? From a low level point of view, whatever location $HOME is pointing to, is a directory just like any other …read more

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Posted in Featured, Interest, linux, operating system, Original Art, philosophy, Software Development, system administration, system architecture, systemd, unix | Leave a comment