A Small GPS Arduino Watch / Clock. Another Arduino GPS Project – Mini GPS Device Garlow is a mini GPS Watch that is based on the Arduino Nano board. It’s not really that “mini” compared to other commercial GPS watch like the Garmin, but I really made a great effort to bring the size down. In fact it looks more like a GPS clock. The first version Arduino GPS logger I built was based on the Arduino UNO, and it was larger than 2 packs of poker cards stacked together. It works just as well as a Garmin GPS watch. Garlow stands for GPS Arduino Rechargeable Logger OLED Watch.
It does what the name suggests: Accurate time, positioning related information are received from GPS satellites, and they can be logged on SD card and shown on a OLED display. During the development of this Arduino GPS watch, I discovered so many things and techniques that I didn’t know about the Arduino, for example I didn’t know you could save data on EEPROM, which is unaffected by power down. So here are all the parts I used in this project.
Programming. Irrduino - An Arduino-based irrigation control system. Soil Temperature/Moisture Sensor [SHT10] ID: 1298 - $49. Take your gardening project to the next level with a SHT-10 based soil sensor. The sensor includes a temperature/humidity sensor module from Sensiron in a sinter metal mesh encasing. The casing is weatherproof and will keep water from seeping into the body of the sensor and damaging it, but allows air to pass through so that it can measure the humidity (moisture) of the soil. It is designed to be submersible in water, but it's always best to avoid long-term (over 1 hour at a time) submersion, if you need something that can be submerged for over an hour you may want to find a different sensor. It can also be simply placed outside for exterior weather sensing. Colorado Micro Devices. HackerspaceWiki.
Senseless Words: Computing with Transistors. In this notebook, we'll be using Julia to investigate the efficiency of matrix multiplication algorithms. In practice, you don't want to use anything presented here - you should instead use the hyperoptimized algorithms provided by BLAS. Not only are the BLAS implementations likely to be more carefully written, but they are also optimized in a very low-level manner. Cache and processor aware optimizations, for instance, can make a great deal of difference when working with large matrices! With that disclaimer out of the way, let's get started. In [1]: using Gadflyusing DataFrames Standard Matrix Multiplication The first algorithm we'll implement is straightforward matrix multiplication, like you learned in high school.
If C = AB is the product of matrices A and B, then C_{ij} is the dot product of the ith row of A with the jth column of B. The implementation above has a very small problem. At(i, j) = (x[i, :] * y[:, j])[1] Strassen's Algorithm Dynamic Padding Dynamic Peeling Benchmarking In [2]: 24GHz single-chip radar an be used in broad range of applications. Bi-Color 8x8 Matrix | Adafruit LED Backpacks. This version of the LED backpack is designed for these bright and colorful square=pixeled 8x8 matrices. They have 64 red and 64 green LEDs inside, for a total of 128 LEDs controlled as a 8x16 matrix. This backpack solves the annoyance of using 24 pins or a bunch of chips by having an I2C constant-current matrix controller sit neatly on the back of the PCB.
The controller chip takes care of everything, drawing all 128 LEDs in the background. All you have to do is write data to it using the 2-pin I2C interface. There are three address select pins so you can select one of 8 addresses to control up to 8 of these on a single 2-pin I2C bus (as well as whatever other I2C chips or sensors you like). Pay close attention to the instructions for positioning the matrix. We wrote a basic library to help you work with the bi-color 8x8 matrix backpack. Wiring to the matrix is really easy Next, download the Adafruit LED Backpack library from github .
PCB Visualizer - Free online PCB data verification service. Janus, The gatekeper | devae.re. Because I was annoyed that every time I came home I had to take out my keys, I wanted to make my front gate keyless. At first I considered options like a keypad or RFID, but those all involved installing extra hardware at the gate and running extra cables. A couple of years ago I had read about a secret knock lock on hackaday, and I came up with the idea to do something simular, but to replace the knocking with ringing the doorbel. So I looked up the project, and found the source code writen by Steve Hoefer to be almost perfect for what I wanted to do.
After a few tweaks I already had a first prototype running. For the final hardware I used a mehduino, an bare bone arduino clone designed at the bitlair hackerspace that already has some prototyping space around it. Appart for the mehduino, there are only some resistors, diodes, buttons, dip-switches and relays on the board. When someone rings the bell, first the entire sequence is record. The Laser Doodler | ch00ftech Industries. So I've got a project coming up (that may have something to do with this tweet) that will require a few LED matrix displays. I found a suitable candidate online and ordered one to play around with. Since I already had the display, I thought it'd be fun to run it through the paces and build a little circuit out of it using some parts I had lying around. What I came up with is the "Laser Doodler. " So when this display arrived in the mail, I wanted something to do with it so I could get accustomed to the pinout and LED intensity.
In order to accomplish this, the display needed to alternate between being a display and being a sensor. A while back, I wrote an article about using LEDs as light sensors. That demonstration was an incredibly quick and dirty hack, and it only worked for a single LED. The display is a BL-M12A883DUG-11 which I found on Adafruit for $7. The device has two parallel rows of 12 pins each. You might be wondering how the heck you drive 64x2 LEDs off of just 24 pins. DIY Arduino Based Quiz Buzzer System. May 31, 2012 AT 5:43 pm Adafruit customer Philippe Chrétien built a quiz buzzer system for his mother. Last Christmas I built a Quiz Buzzer System for my mother. She is a big fan of television quizzes and love to organize some with her friends and family. The particularity of this project is that you can choose your team buzzer sound from a list of more than 30 digital sounds.The system is composed of a main console, 8 buttons, a power supply and a set of telephone cables.
The core of the console, built in a plastic project box, is made of an Arduino Duemilanueve micro-controller coupled with an Adafruit wave shield. The 8 buttons are made out of small project boxes and arcade buttons, again from Adafruit. The buttons are connected to the main console using telephone jack and cables. Really well packaged and put together system. Adding quality audio to an electronic project is surprisingly difficult. In Stock and Shipping Now! Related No comments yet. Blog: More Printed Circuitry. It’s been quite a while since I've done an update on the metal printing front, so I thought I'd do an update of where we are. In my last blog post I set out about choosing a low melting point metal which would have some unusual properties which would help with printability - mainly choosing a temperature which would minimise damage to our traditionally printed plastic components on to which our metal would be deposited, and also using a non-eutectic to attempt to minimise the effects of surface tension.
One of the main problems I previously had was solubility. Running molten metals were acting as solvents for my heated nozzle - resulting in the nozzle slowly dissolving during a print. Previously the plastic and metal were printed on separate machines. Anyway, I've heavily modified my X carriage to take one Bowden extruder (for the plastic) and one "standard" extruder for the metal such that I can (in theory) do one shot printing. I printed the above about a month or so ago. Home Page.
SMT Soldering–It’s easier than you think! Is our new Manga Comic that shows you step by step tips and techniques for learning to solder SMT parts . We’d love to get your feedback on the comic. We are in the process of working out the kinks so we can get translations of the comic into everyone's hands – we’ll keep you posted. For everyone that learns better with hands on experience we are offering our SMT 2D6 SMT Learn to Solder Kit in the store. Products > Arduino. Disney researchers put gesture recognition in door knobs, chairs, fish tanks. Imagine a door that locks when you pinch the knob. Or a smartphone that can be silenced by a hand gesture.
Or a chair that adjusts room lighting when you recline into it. A team of researchers at Disney Research and Carnegie Mellon University in Pittsburgh have come up with a system called Touché, which uses the same capacitive technology as a smartphone's touchscreen to imbue everyday objects with body and gesture recognition. Your smartphone works thanks to capacitive coupling. This is typically a binary configuration, as the screen is either being touched or it isn't.
Plus, different body tissues have different capacitive properties, so monitoring a range of frequencies can also detect a number of different paths that the electrical charge takes through the body. It's called Swept Frequency Capacitive Sensing (SFCS), and while it means analyzing hundreds of data points at any time, modern microprocessors are now fast enough to handle the data load.
Roving Networks | Home. Gas Sensors. Adaruit Resistor Helper by adafruit.
USB / Solar Lithium Polymer (LiPoly) Charger tutorial. Partlist Wednesday: Lithium-polymer battery charger chips. DE0-Nano power efficiency mod » The Lair of Mako. I recently bought a DE0-nano FPGA development board, which I’m currently using to mine Bitcoins. It’s kind of a neat board, but one downside to it is that it uses linear regulators to provide the 1.2V core supply to the FPGA, and they’re incredibly inefficient at this.
Only about 25% of the power supplied to them actually goes into the 1.2V supply; the other 75% is wasted as heat in the regulators. Since Bitcoin mining is very power-hungry, an awful lot of the power usage is in the 1.2V core supply and the regulators get really hot. Fortunately, it’s possible to mod the board to use a more efficient external buck regulator to supply the 1.2 volts required by the FPGA core logic. Basically, what you need to do is get a suitable buck converter that can accept 3.3-5.5V input and supply 1.2V at up to 1500mA. Power the board down again, flip it over and desolder R61.
Finally, solder another short thick wire from OUT+ on the regulator to the 1.2V side of J6. Dangerous Prototypes | A new open source hardware project every month. A Beginner’s Guide to the MOSFET « ReiBot.org. IRFP260N image from warf.com. Pins are Gate, Drain, Source from left to right. If you need to switch high current and or high voltage loads with a micro controller you’ll need to use some type of transistor. I’m going to be covering how to use a MOSFET since it’s a better option for high power loads. This guide will be just a brief introduction that will discuss how to drive a MOSFET in a simple manner with the ultimate goal of making it act like an ideal switch.
I’m not going to get into any of the topics such as Triode region, Saturation, Threshold Voltage, etc… Refer to the N or P channel basic wiring schematics and remember the three pins: Gate, Drain, and Source. Thank you Farnell.com for supplying many of the parts that will be part of this review/guide. N channel MOSFET How to think of a MOSFET: A MOSFET may be thought of as a variable resistor whose Drain-Source resistance (typically Rds) is a function of the voltage difference on the Gate-Source pins. P channel MOSFET. Chart_xbee_rf_features.pdf (application/pdf Object) What They Don’t Tell Engineers About E-Textiles. Arduino Dashboard App. App Delegate Inc. Software. Building a simple Fritzing component - Tales from the Evil Empire. This is me shaving a yak. Shaving the yak, if you don't know, is what you do when a seemingly simple task necessitates many recursive and unforeseen sub-tasks in order to be carried out. The story goes like this… Let's say that I want to paint a picture, but I'm in a shack in the middle of the desert and I don't have a canvas, brushes or paint.
I do have a piece of strong cloth, a few pieces of wood, and the rocks around the shack can provide some pigments that I can mix with some oil. For the nails, I can extract some from the shack's structure itself. For the brush, I'll need some quality hair. Well, long story short, before I know it, here I am, in the middle of the desert, shaving a yak. Today's metaphorical yak is the representation in Fritzing of a $0.95 part, a knob potentiometer.
A Fritzing component is typically made of five XML files that can be optionally packaged together using a zip format. One thing you need to know when you do this is where Fritzing is putting your files. Microsoft .NET Gadgeteer. TV - Rectenna Converts Radio Waves To Electricity. Energy harvesting technologies collect a very small amount of power for low-energy electronics, this rectenna is one of the latest advancements in this area. "The word 'rectenna' is the combination of the abbreviated words 'rectifying' and 'antenna' and it basically converts radio waves into electricity. " "Today we are exhibiting on the theme of environmental electricity, with exhibits in two areas of collecting wireless LAN and digital terrestrial broadcast signals. Our concept is to collect electricity by collecting electrical waves within the office or at home, or by attaching this rectenna to an outside wall.
" The rectenna, developed by Nihon Dengyo Kosaku, is relatively thin, at 12mm for Wi-Fi and 30mm for digital terrestrial broadcast waves, and uses only 50µW of power to start. "With wireless LANs, it can generate power in the order of micro-watts at a distance of around 10cm. Visualizing EAGLE Edits with a Gerber Viewer. Micro SD card Tutorial - using SD cards with an Arduino! Jeri Ellsworth Dot Com. Make your own EL wire at home. Download. Making Microchips at Home – Cooking with Jeri. Plantduino Greenhouse. How ultracapacitors work (and why they fall short) — Cleantech News and Analysis. View topic - Solar Minty + DHT22 + Waterproof DS18B20 + PH Probe. Cheap-thermocam.tk. The Crew. FT232R. Intervall Timer for Nikon und Canon DSLR v2. Life long experimenter - It can be done. LightScythe - The Mechatronics Guy. Converting ATX Power Supply to Lab Bench Power Supply » Jumper One. Sensor tutorials - DHT11/DHT21/DHT22 low cost temperature/humidity sensors.
Light Field camera | Lytro. Send a Tweet to Your Office Door. i2c / SPI character LCD backpack [v1] ID: 292 - $10.00. View topic - LiquidTWI: High-performance LCD library for I2C Backpack Module. First self-powered device with wireless data transmission. View topic - How to build a $23 graphic LCD shield. Solder Flux Choices for Hand Soldering. Big Mess o’ Wires » Low-Power LCD Smackdown. Project:Nanode - London Hackspace. London Hackspace - London Hackspace. Energy monitoring CMS development page. GardenBot - open source garden automation project. Modkit. - Technology Will Save Us. From Illustrator to Eagle: Vector graphics in circuits. Welcome. Community for development of machine-to-machine (M2M), embedded wireless, embedded mobile and connected consumer devices.
Total Grid Community | Open Source Community for the Smart Grid - Home. Dot: 360º video capture for the iPhone 4 by Jeff Glasse. Lithium-Ion (LiIon) & Lithium polymer (Lipoly) battery tutorial. Why Google Choosing Arduino Matters and is This the End of “Made for iPod” (TM)? Google’s open accessory development kit on standard Arduino hardware « Romfont. Netduino : Overview. MightyOhm. Cornfield Electronics :: Cornfield Electronics - Maker Faire Page. Soldercomic.jpg (JPEG Image, 1275x1651 pixels) Electrical Engineering and Computer Science | 6.002 Circuits and Electronics, Spring 2007.
Electricfoxy. Industries blog. Q&A: Open Source Electronics Pioneer Limor Fried on the DIY Revolution | Magazine.
Adafruit Industries, Unique & fun DIY electronics and kits. BBC video on hardware hacking. Gameduino: an Arduino game adapter by James Bowman. Modular Robotics | Cubelets. How to Pick Your Next Android Phone: The Specs That Matter (and the Ones That Don't) Arduino The Documentary (2010) English HD. Project HiJack uses iPhone audio jack to make cheap sensors. What Is Sanguino? - Sanguino.cc. How Do I Put Together a Tech Survival Kit? Make A TRON Bag - How to use EL (Electro Luminescent) Wire. Deep darc » Hacking Christmas Lights.