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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
Posted in Arduino Hacks, balance, MEMS, mpu6050
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“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
Posted in 2019 Hackaday Prize, fpga, Hackaday Prize
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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
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
Posted in BLDC, coanda, coanda effect, fan, foam core, hovercraft, lift, misc hacks, propulsion
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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
Posted in addressable led, Arduino Hacks, ESP8266, led hacks, light painting
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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
Posted in 2019 Hackaday Prize, cpu, Hackaday Prize, hardware, Tech Hacks
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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
Posted in adc, analog, calibration, converter, dac, digital, DNL, Engineering, Hackaday Columns, INL, Original Art
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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