Pitot tube using pressure sensors

IntroductionIn this manual you can learn how to make your own Pitot tube to determine the velocity of the studied body of water using pressure sensors instead of conventional height measurements. The upward force the water exerts on Styrofoam cylinders inside the tubes is measured by the pressure se...
By: niek.hunink.7

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Instructables 27 Nov 22:13

Measuring turbidity by light intensity

Fora school project (TU Delft) we have made a sensor which can measure turbidity in water. One can imagine that when less light is being reflected by sediment the turbidity of a fluid is lower. To do this we used an Arduino setup, which we will discuss later. By: Simon Schilder Nils Damia...
By: sschilder

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Instructables 27 Nov 19:54


Introduction:In this instructable we want to explain you how to build a simple hygrometer. A hygrometer measures the relative humidity in the air.In short: we measure the normal temperature and the wet temperature. With this two measurements we can calculate the relative humidity. This is what we pr...
By: hansverkaik

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Instructables 27 Nov 14:20

Pimp your ikea lamp into a customized death star

Ikea hacks are well widespread in the maker movement and David Bliss, founder at Nurun, did a great job transforming the Death Star inspired PS 2014 Pendant Lamp into something more dynamic.

The lamp was pimped up with an Arduino Uno and Arduino Motor Shield, NeoPixel LEDs and other components you can see in the illustration.

The detailed description of the project is on his blog , the code on github and the final result in the following video:

Arduino Blog 26 Nov 22:41
arduino  featured  ikea  led  motor  shield  

Measuring flow velocity by heat advection

Measuring flow velocity by heat advectionFor the course "Meten aan water" (TU Delft), we have made a device to measure the flow velocity by advection of hot water. In this article we describe how we made the device and how the arduino is used to measure flow velocity. The measurement is based on the...
By: lschuurman

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Instructables 26 Nov 11:16

Ray tracing on an Arduino

[Greg] implemented a simple ray tracer for Arduino as a fun exercise and a way to benchmark the processor. He started out with the Moller-Trumbore algorithm, a common ray-tracing algorithm that calculates the intersection of a ray with a triangular plane without doing any pre-calculation of the planes. His code supports one static light and one static camera, which is enough to render a simple scene.

[Greg] started out with a small scene composed of a few polygons, but just finished up a scene with 505 vertices, 901 faces, and reflective surfaces (shown above). He made the above render on his PC emulator, but estimates that it would take just over 4 days to render on the Arduino. [Greg]’s project supports multiple bounces of light, which differentiates his ray tracer from some we’ve covered before (and which explains why it takes so long to render).

The ray tracer is implemented entirely with double-precision floats. This translates to a ton of software float emulation instructions, since the Arduino doesn’t have a floating-point unit. While this ray tracer can’t render anything near real-time graphics due to the slowness of the microcontroller, it’s still a great proof of concept.

The title image for this post was rendered on a modern PC, taking 263 seconds to complete. The same scene, at 64×64 resolution, was rendered on the Arduino, taking 4008 seconds to complete. That render is below.

Filed under: Arduino Hacks

Making something useful for your home with Materia 101

When you become a happy owner of a Materia 101 3d printer, the first days are really important to start experimenting with the right attitude. Understanding quickly how to get what you want from it means becoming aware of the potential applications of the 3d printing technology in your environment.

Last week we published  the tutorial  on  “Getting started with Materia 101″ created by Kristoffer  and kicking off a series of step-by-step guides to explore different topics, softwares and settings for your 3d printer.

Take a look at the second tutorial focused on  fixing things at home: “Making something useful” tutorial shows you how to start from a need, to design and print a solution. It feels great to be able to fix what’s broken!

Interested in getting in touch and showing your experiments? Join Kristoffer on the Arduino forum and give us your feedback.

Next week we are going to post a tutorial on how to create 3d-printed cases for Arduino boards. Stay tuned.

Hashtag: #Materia101

Iphone bluetooth control arduino

How-To Components:- Arduino (im used nano)- HM-10 BLE module- Iphone 4S or later, and Ipad with BLE (maybe from the "air"?)- LightBlue app from App Store (Free)Wiring:Its similar as other bluetooth modules (HC-05/06) See image if not clear.Arduino RX to Bluetooth TXArduino TX to Bluetooth RXBlue...
By: planetleak

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Instructables 25 Nov 18:49

Arduino LED Matrix Clock

This clock uses five MAX7219 8x8 LED matrices to display a clock. The two left units display the hour, the right two the minutes, and the middle matrix counts off the seconds. This is accomplished by illuminating one LED per second, counting across each row. The 8th LEDs in alternate rows are skippe...
By: PM4

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Instructables 25 Nov 18:22

DIY Robot Mold Making, Casting, and Arduino Remote Control

Learn how to build your own unique robot with ComposiMold.Parts List:ComposiStone (2lbs), Hot glue, Spray adhesive, PureCast605, Elmer’s Glue, Used ComposiMold, ProtoCast85R, Water, Toy Robot, Silicone, Cardboard Box’s, Paint, Colored tissue Paper, Cups, Wires, Delight Paper Clay, Plastic bags/ tras...
By: ComposiMold

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Instructables 25 Nov 17:38