DIY Arduino Pro Mini quadcopter

Hackaday

[execUc] took a stock V929 quadcopter and started making some crafty customizations. The main change – the control electronics were replaced by an Arduino Pro Mini (16Mhz model). He soldered all the modules on a prototyping board and, although admittedly a bit heavy, the little guy takes flight with no problem.

Among other details, an HMC5883L (magnetometer) and MPU6050 (accelerometer / gyroscope) are used as sensors. A LiPo 7.4V battery pack supplies the power. The brushed motors are controlled by pulse-width modulation from SI2302 MOSFET with added diodes. He plans to swap out the micro-controller for an ARM7 stm32F103 for extra computing power, and needs to play with the PID values to correct a slight problem he seems to be having when rotating.

Check out a test flight video after the break. [execUc] has a thorough list of all the alterations he made in the video description, so be sure…

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Words of wisdom from a maker entrepreneur

Hackaday

words-of-wisdom-from-a-maker-entrepreneur

Have an awesome invention that you want to create and sell to the world? Think you have everything all planned out and you’re ready to just let the money flow in? Maybe not. Take a few moments and read [Jonathan]’s first hand experience of a maker start up business that didn’t go anything like he had planned.

[Jonathan] thought he was ready. He had created a unique product and, by taking pre-orders, didn’t have to front any of his own capital. He had shown that there was demand for such a device. The big problem…supply. Selling things was the easy part. Actually making them was another story. Every step of the way had complications. Printing errors, parts suppliers backed out, an international money transfer didn’t go through, postage rates increased, suppliers sent the wrong parts, and he and his wife had a baby. His stress levels were through the…

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TwistedSifter

 

I recently came across a fascinating sub-reddit called ‘r/Battlestations‘. It consists of pictures of people’s computer stations. Some are for work, many are for gaming, all of them are awesome in their own way. From clean and minimal to an insane 15-monitor setup these computer desks run the gamut.

After spending a couple hours going through these pictures, my own setup is feeling pretty lacklustre. Time to step up my monitor game! Which computer station setup is your favourite? Let us know in the comments below. And be sure to head over to http://www.reddit.com/r/battlestations/ for hundreds and hundreds more!

 

 

 

quad screen computer setup battlestation two landscape monitors stacked flanked by two portrait monitors

Photograph and Setup by Lrnflk on Reddit

 

 

 

 

five monitor computer setup all monitors set up in portrait style full wrap around view

 

five portrait computer monitor workstation set up

Photographs and Setup by inappropriate_input on Reddit

 

 

 

 

dual monitors mounted directly onto the wall with backlit blue led lights

Photograph and Setup by mrjoey35 on Reddit

 

 

 

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Shock sword works best on foes who fight with multiple blades

Hackaday

shock-sword

This project most certainly has some of Trailer Park Boys rolled into it. We say that because the living room is the only place this will ever been used and this guy’s reaction to getting shocked is exactly how [Ricky] would respond.

The sword on the left has an electronic stun mechanism built into it. it works by energizing two blades which are separated by nylon bolts and spacers. Look closely at the tip and you’ll see the blue glow which indicates high voltage. To shock your victim you have to touch them with both blades at the same time. This is demonstrated in one of the videos after the break. But the real pain comes when [Jonathan] — the guy who built the stun sword — touches it on either side with this pair of blades. His body completes the connection and his NSFW language tells the tale of…

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Minimalist user interface for headless Raspberry Pi applications

Hackaday

minimial-ui-for-headless-rpi

[Jason Birch] just finished building a beautifully simple user interface for the Raspberry Pi. The goal was to keep it small and intuitive while still providing a range of functionality. His add-on hardware gives feedback using several LEDs and a four-line character LCD screen. It provides control using just four momentary press switches.

The base for the add-on hardware is a chunk of protoboard the same size as the Pi itself. This is just slightly wider than the LCD screen, leaving room along the top for the row of buttons with different colors of LEDs in between them. Look closely in that nest of point-to-point wiring and you’ll find the dual pin-socket which mates with the RPi GPIO header. One important note from [Jason] mentions that the LCD screen R/W pin must be tied to ground. This keeps it from going into read mode, which would push 5V over…

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