Matias Aranguren

10 Flips | 2 Magazines | 4 Likes | 3 Following | @Matuaranguren | Keep up with Matias Aranguren on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “Matias Aranguren”

Sensing Color With a LED and Op Amp

Robot Room’s David Cook shows how an LED and op amp, along with a resistor and cap, can be built into an amplified color sensor.<p>Unfortunately, even under the best conditions, photodiodes (and reversed LEDs) don’t provide a lot of current flow. The output of the photodiode needs to be amplified for …

DiResta: Stacking Stools

<i>In each bi-monthly episode of DiResta (every other Wednesday at 2pm PT), artist and master builder Jimmy DiResta (Dirty Money, Hammered, Against the Grain, Trash for Cash) lets us into his workshop, to look over his shoulder while he builds whatever strikes his fancy. On this episode of DiResta,</i> …

Use Op-Amps to Make a LED Color Organ

Collin Cunningham’s awesome videos are always great to watch. This time, Collin shows how to build a Color Organ, which is a light display that responds to sounds around it, allowing you to build cool visualizer effects to go with your tunes.<p>Long before the dawn of digital music, folks employed the …

How-To: Brew Sake

Sake, the delicate Japanese alcoholic beverage, is said to have originated in the Nara period (710–794 AD). And though it’s often referred to as rice wine, sake is produced using a grain-based brewing process more like that of beer. Surprisingly, sake is easy to make, requires only four …

The Solder Buddy

This mechanised solder dispenser was built by design engineer Jude Pullen as an example of what could be done using ABS plastic sheeting, a broken brake cable from a bicycle, and some Sugru. The clever bit? The electrical connection to the switch is made via the solder itself and the outer windings …

Resin Casting: Going from CAD to Engineering-Grade Plastic Parts

Synthetic polymers play a role in almost every single commercially manufactured item on the planet. Plastics are not just ubiquitous, but extremely versatile: some of them are incredibly stretchy, while some are hard as nails; some are crystal clear, and others come in all colors of the rainbow; …

Charge Your Smartphone–With Fire!

If fire wasn’t the first thing invented, it was probably the second. The human race has had a long relationship with fire, and now you can use it to charge your smart phone, GPS, or anything else that you can connect to this thermoelectric generation using a USB cable. David Johansson, from …

Irrigating Your Garden With an Op Amp

Instructables user diy_bloke built this op-amp controlled pump for his garden, using the classic 741 operational amplifier.<p>He wrote a very detailed how-to including showing how to etch a PCB, as well as how to make a humidity sensor out of gypsum:<p>The simplest form of a soil humidity sensor is made …

Grow: A Portable CNC Router System

The Grow CNC, a portable CNC router system:<p>I am the James Dyson Fellow at the Royal College of Art’s InnovationRCA. I have developed a new type of portable full scale flat bed CNC router. The design is aimed at professional power tool users and maker/hackers alike. The design is modular in nature, …