When Tyler DeAngelo asked if we'd be interested in checking out his new project, we jumped at the opportunity. After all, we were pretty blown away with Fifth Avenue Frogger, his hacked arcade cabinet that incorporated real-time webcam footage of a busy Manhattan street into gameplay. His latest project, Check 'N Chew certainly has more apparent commercial applications, offering up a form of immediate gratification for social media users. The concept is fairly simple: check into Foursquare, get a gumball.

DeAngelo has hacked an off-the-shelf gumball machine with a stepper motor, Arduino and an XBee radio. There's also a port on the rear of the machine that plugs into a wall to power it all. The Check 'N Chew communicates wirelessly with an ethernet-to-wireless gateway device. When someone checks into an authorized location, information is sent from DeAngelo's server to the gateway, and a gumball is dispensed. The whole process is quite speedy, only taking a couple of seconds from Foursquare check-in to gumball dispensing.

Gallery: Check 'N Chew Foursquare-enabled gumball machine hands-on (video)

Continue reading Check 'N Chew Foursquare-enabled gumball machine hands-on (video)

Filed under: Misc. Gadgets

Check 'N Chew Foursquare-enabled gumball machine hands-on (video) originally appeared on Engadget on Thu, 16 Aug 2012 17:59:00 EST. Please see our terms for use of feeds.

[Rob] has been hard at work designing and building this LED suit which he can wear to parties. He’s got it working, although right now it’s just a pair of pants. It reacts to sound, and has the potential to be controlled from a smartphone via Bluetooth. You’ll find a video description of the build embedded after the break.

The planning started off by selecting driver hardware for the LEDs. [Rob] wanted the suit to pulse to the music in the room so he grabbed an MSGEQ7 chip. When connected to a microphone and opamp this chip will output a signal which can be used as a VU meter. He built the hardware into an Arduino shield, then got to work on the LED driver board. He’s using LED strips, but they’re not individually addressable. Instead he cut loops which wrap around the wearer’s legs. Each loop connects the pins of a TLC5947 LED driver chip which sinks a constant current and offers PWM abilities. He’s using PNP transistors on the high side.

For anyone that’s ever worked in a Tyvek suit before you’ll know they don’t breathe. Sweat will literally be pouring off of you. And we’d bet that’s what cause the short that burned the back of [Rob's] leg at a recent party. Then again, your light-up pimp coats are going to be hot to wear too.

If you prefer reading your RSS feeds without the backlight, there's hardware for that, and if you'd prefer not reading your Twitter feeds at all, there's now hardware for that as well. Mix an Arduino Ethernet board, an Emic 2 Text-To-Speech Module and the knowhow to put them together, and you've got SocialChatter -- a neat little build that'll read your feeds aloud. The coding's already been done for you, and it's based on Adafruit's own Internet of Things printer sketch with a little bit of tinkering so nothing's lost in translation. If your eyes need a Twitter break and you've got the skills and kit to make it happen, head over to the source link for a how-to guide. Don't fill the requirements? Then jump past the break to hear SocialChatter's soothing voice without all the effort.

Continue reading Arduino-based SocialChatter reads your Twitter feeds so you don't have to (video)

Filed under: Misc. Gadgets, Internet

Arduino-based SocialChatter reads your Twitter feeds so you don't have to (video) originally appeared on Engadget on Thu, 16 Aug 2012 11:58:00 EST. Please see our terms for use of feeds.

The official Arduino wifi shield is out, and it’s kinda sexy!

The Arduino Wifi Shield is finally here!

We’ve been working for a while on this new wifi shield for Arduino that is quite different from what you can find already on the market. Instead of just getting the usual pre-made module we decided to build a product that would encourage hacking and modifications so we decided to use an AVR32 processor running an open source version of TCP/IP and the WIFI software stack. The Arduino communicates over SPI with the AVR32 and this in turn controls the WIFI module, an HDG104 from H&D Wireless. Following the Arduino tradition the full software stack running on the AVR32 is released as open source as well as the Arduino library that controls the shield.

Having the full source for the software stack allows adding more complex protocols directly on the AVR32 without using the limited code space of the atmega328 on the Arduino. On top of this, skilled C developers can re-program the shield to operate as a standalone device without the need of an Arduino connected to it. Since we expect that there will be amazing new features created by the community we made updating its firmware very easy, just connect a usb cable to the shield. We believe this opens up to a lot of hacking potential.

Want one? You can buy the shield from the Arduino store.

The Arduino Wifi Shield is finally here!

We’ve been working for a while on this new wifi shield for Arduino that is quite different from what you can find already on the market.

Instead of just getting the usual pre-made module we decided to build a product that would encourage hacking and modifications so we decided to use an AVR32 processor running an open source version of TCP/IP and the WIFI software stack. The Arduino communicates over SPI with the AVR32 and this in turn controls the WIFI module, an HDG104 from H&D Wireless. Following the Arduino tradition the full software stack running on the AVR32 is released as open source as well as the Arduino library that controls the shield.

Having the full source for the software stack allows adding more complex protocols directly on the AVR32 without using the limited code space of the atmega328 on the Arduino. On top of this, skilled C developers can re-program the shield to operate as a standalone device without the need of an Arduino connected to it.  Since we expect that there will be amazing new features created by the community we made updating its firmware very easy, just connect a usb cable to the shield. We believe this opens up to a lot of hacking potential.

Here are some of its features:

• Connection via: 802.11b/g networks
• Encryption types: WEP and WPA2 Persoanl
• Connection with Arduino on SPI port
• on-board micro SD slot
• ICSP headers
• FTDI connection for serial debugging of WiFi shield
• Mini-USB for updating WiFi shield firmware
• HDG104 Wireless LAN 802.11b/g System in-Package
• Atmega 32UC3 32bit microcontroller
• open source firmware.

For more details see the product page and on the wifi-shield on the Arduino Store.

We hope you will enjoy creating with the new member of the Arduino family.

As part of a class at University, [Emacheen22] and his teammates turned an old Connect 4 game into a binary clock. This image shows the device nearing completion, but the final build includes the game tokens which diffuse the LED light. We enjoy the concept, but think there are a few ways to improve on it for the next iteration. If you’re interested in making your own we’d bet you can find Connect 4 at the thrift store.

Instead of using the free-standing game frame the team decided to use the box to host the LEDs and hide away the electronics. Since they’re using a breadboard and an Arduino this is a pretty good option. But it means that the game frame needs to be on its side as the tokens won’t stay in place without the plastic base attached. They used a panel mount bracket for each LED and chose super glue to hold all of the parts together.

We think this would be a lot of fun if the frame was upright. The LEDs could be free-floating by hot glueing the leads to either side of the opening. Using a small box under the base, all of the electronics can be hidden from view. After all, if you solder directly and use just a bare AVR chip there won’t be all that much to hide. Or you could get fancy and go with logic chips instead of a uC.

Hey look, an Arduino without its clothes on. This one’s just started its journey to becoming the ubiquitous prototyping tool. The image is from [Bunnie's] recent tour of the fab house where Arduino boards are made.

As it says on every true Arduino board, they’re made in Italy. [Bunnie's] trip to the factory happened in Scarmagno, on the outskirts of Torino. The process starts with large sheets of FR4 copper clad material, usually about 1 by 1.5 meters in size. The first task is to send the sheets through a CNC drill. With all of the holes done it’s time for some etch resist; the image above is just after the resist has been applied. A robotic system takes over from here, running the panels through the chemicals which first etch away the copper, then remove the resist and plate the remaining traces. From there it’s off to another machine for solder mask and silk screen.

There are videos of each step available. But our favorite piece is the image at the end that shows a pallet with stacks of completed PCB panels which are headed off to be populated with components.

[via Reddit]

If you connect led in the opposit way he can act as light sensor:

positive leg to analog pin

negative leg to 5V

You can use that for some things, but he not sensetive as LDR,

ןf you use a for example a green led he not "see" well red light

If you use charlieplexing method you can control one led to light and as a light sensor.

The idea is like this:

Two wires connect the led to two analog pins.

To light the led you set the two analog pins as digital output and one high one low. 

read more

Hi

I tried to build a photovore using and arduino and tested it via usb cable,so far so good the system worked as intended as soon as i plug my battery via the dc connector the servo worked but extremly slow why?

Toy vehicles from plastic bottles are pretty cool. Add an Arduino, solar panel, batteries, ultrasonic range finding, a few servos, some beefier tires, and you’ll have something like Fijibot, an autonomous, self-charging robot built by Mike Soniat.