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Preview: Hack a Day

Hackaday



Fresh hacks every day



Last Build Date: Tue, 26 Sep 2017 20:26:46 +0000

 



Cheap DIY MIDI to USB Adaptermidi_adapter_02anool

Tue, 26 Sep 2017 20:00:25 +0000

[Joonas] became frustrated with cheap but crappy MIDI to USB converters, and the better commercial ones were beyond his budget. He used a Teensy LC to build one for himself and it did the job quite well. But he needed several converters, and using the Teensy LC was going to cost him a lot more than he was willing to spend. With some tinkering, he was able to build one using an Adafruit Pro Trinket which has onboard hardware UART (but no USB). This lack of USB support was a deal killer for him, so after hunting some more he …read more

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Hackaday Prize Entry: Adaptive GuitarAdaptive guitar: pick board and controllerstevenduf

Tue, 26 Sep 2017 18:30:51 +0000

Due to a skiing accident, [Joe]’s new friend severed the motor nerves controlling her left arm. Sadly she was an avid musician who loved to play guitar — and of course, a guitar requires two hands. Or does it? Pressing the string to play the complex chords is more easily done using fingers, but strumming the strings could be done electromechanically under the control of a foot pedal. At least that’s the solution [Joe] implemented so beautifully when his friend’s family reached out for help.

There are just so many things to enjoy while reading through [Joe]’s project logs on …read more

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Return To The Asus Tinker Board: Have Six Months Changed Anything?tinker-board-return-featuredjennylistThe Asus Tinker Board, in all its gloryA tiny bit of apt-get magic gave us a screenshot of the Tinker Board desktop.The Tinker Board official website.The tinkerboarding.co.uk home page

Tue, 26 Sep 2017 17:01:01 +0000

Back in February this year, we ordered a new single board computer, and reviewed it. The board in question was the Asus Tinker Board, a Raspberry Pi 3 competitor from the electronics giant in a very well-executed clone of the Raspberry Pi form factor.

Our review found its hardware to be one of the best of that crop of boards we had yet seen, but found serious fault with the poor state of its software support at the time. There was no website, the distro had to be downloaded from an obscure Asus download site, and there was no user …read more

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Sector67 Hackerspace Rocked by Explosion at New Locationsector67bobbaddeley

Tue, 26 Sep 2017 15:30:00 +0000

Madison, WI hackerspace Sector67 is in a period of transition as they move from their current rented location to a new property that will be their permanent home a half mile away. Last Wednesday (September 20, 2017) an unfortunate propane explosion in the new building led to the injury of Chris Meyer, the founder and director of the hackerspace.

The structure has been stabilized and renovation is continuing, but Chris was seriously burned and will be in the hospital for at least a month with a much longer road to complete recovery. It is fortunate that nobody else was injured. …read more

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An Introduction to Solid State Relaysssr-blog-view-wbsboycevn

Tue, 26 Sep 2017 14:01:49 +0000

When we think of relays, we tend to think of those big mechanical things that make a satisfying ‘click’ when activated. As nice as they are for relay-based computers, there are times when you don’t want to deal with noise or the unreliability of moving parts. This is where solid-state relays (SSRs) are worth considering. They switch faster, silently, without bouncing or arcing, last longer, and don’t contain a big inductor.

An SSR consists of two or three standard components packed into a module (you can even build one yourself). The first component is an optocoupler which isolates your control …read more

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Chess Robot’s Got the Moveschessnerdyjb

Tue, 26 Sep 2017 11:00:46 +0000

[RoboAvatar]’s Chess Robot consists of a gantry-mounted arm that picks up chess pieces and places them in their new location, as directed by the software. The game begins when the human, playing white, makes a move. When a play has been made, the human player presses a button to let the robot to take its turn. You can see it in action in the videos we’ve posted below the break.

Running the robot is an Arduino UNO with a MUX shield as well as a pair of MCP23017 I/O expander chips — a total of 93 pins available! Thanks to …read more

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Emulate ICs in Pythonpywd5gnr1

Tue, 26 Sep 2017 08:00:04 +0000

Most people who want to simulate logic ICs will use Verilog, VHDL, or System Verilog. Not [hsoft]. He wanted to use Python, and wrote a simple Python framework for doing just that. You can find the code on GitHub, and there is an ASCII video that won’t embed here at Hackaday, but which you can view at ASCIInema.

Below the break we have an example of “constructing” a circuit in Python using ICemu:

dec = SN74HC138()
sr1 = CD74AC164()
sr2 = CD74AC164()
mcu_pin = OutputPin('PB4')

sr1.pin_CP.wire_to(dec.pin_Y0)
sr2.pin_CP.wire_to(dec.pin_Y1)
sr1.pin_DS1.wire_to(mcu_pin)
sr2.pin_DS1.wire_to(mcu_pin)

print(dec.asciiart())
     _______
   A>|- U +|>Y7
   B>|-   +|>Y6
   C>|-   +|>Y5
 G2A>|-   +|>Y4
 

…read more

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