Darby’s not dead

Story In the future there is a bar where all the dead punk rockers hang out. They are each given a MiFare classic card programmed with their name and 666 credits. This is the device the bartender uses to keep track of their tab. This project uses an atmega168 to control a pn532 breakout board to write cards as well as read them. Once the data is read it gets sent to the Particle core over USART and then sen ...

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Programming ATtiny85 with Arduino Uno

Story I am working on a project which requires reading multiple sensor data on different locations. These require only few PWM pins so using multiple Arduino Uno would be expensive and unnecessary. So I decided to use ATtiny85 microcontroller in place of Arduino Uno development boards. ATtiny85 is a cheap and powerful alternate when u don't need too many PWM pins. Since ATtiny85 is just a microcontroller we ...

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2 Players Competition/Quiz Buzzer Box System Using Arduino

Story A bit of background. My brother came to me with an odd box that a friend of his asked someone to make so that they can determine the fastest contestant to push a button. The box consisted of some LEDs, two buttons, and two sets of bicycle bells that made some weird noises. It did light up and make noises, but it did not actually serve the purpose it is made for, which is to actually determine the firs ...

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Congnitive GSM Autonomous Water Meter

Story Imagine you could administer remotely your water utility service in real time, turning on or off your water services according to your usage patterns or needs, and not just letting the water flow in all the time, you could prevent taps for leaking a single drop per one faucet per one home leaking wastes 34 galons of water per year multiply that for 10,00 homes that 347,159 GALONS a YEAR and a running ...

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Back-Saver: Backpack-carrying follower robot powered by Wunderbar

Hardware components: SparkFun RedBoard × 1 DC Stepper Motor 28-BY-J-48 × 1 MB 1010 LV-Max-Sonar EZ1 × 1 WunderBar × 1 Story A Sparkfun Red-Board utilizes a LV-Max Sonar component to judge distances between the user and the robot, powering the DC stepper motor to move forward, reverse or change direction. Each motor requires around 5V to operate. In the future, a feature using the TellMeWhen Relayr app and t ...

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How to use the TFT display 2.2″ QVGA with Arduino

Story The main purpose of this project is to build a system based on chip ATMEGA328P, Arduino compatible, and interface it with a 2.2" QVGA TFT display using the library ILI9341. As an alternative to the self-build system you can use an Arduino Pro 3.3 V/ 8 MHz board or similar. This system works well and can be very useful for many applications, as data-loggers, graphic terminal, etc. A great advantage of ...

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Easy Serial on the ATtiny

Introduction The Atmel tinyAVR MCU's are great little chips for projects but can prove difficult to debug. Some ATtiny chips do not have direct support for hardware based serial and therefore the Serial object is unavailable in your code, however, it is easy to add a SoftwareSerial object and view output in the Arduino IDE. The code in this article uses an ATtiny85 with an FTDI Serial TTL-232 USB Cable to s ...

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CyDuino : An Arduino Dev Board with Lots of Goodies

Story We (most of us) really like Arduino because it's possible to make cheap clones, lots of libraries, examples, forum support and community out there. Outside Arduino world, I like Cypress PSoC for some of its cool features like Graphical IDE, APIs, great features and understandable documentation. I have bunch of PSoC® 4 CY8CKIT-049 4xxx Prototyping Kits. The first half of this kit has CY7C65211 device, ...

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Trinket Firmware Exorcism

Story Warning: Digispark uses Attiny85 PIN#1 as I/O - remove RESET button functionality Notes FOR ADVANCED USERS ONLY  The Trinket 5V and the Digispark share the same hardware design, right down to the LED being on PB1. Personally, I prefer the Trinket hardware over the Digispark, but the Digispark has a totally different ecosystem and is stackable, but for this article only the hardware design similarities ...

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A Semaphore for your Office Desk

Story This is a small semaphore you can put on your desk. You can use it to tell whatever you want to the people around it. For example, because you need some concentration and you'd like your colleagues not to disturb you. Or to tell the status of the system you're managing. Or say which mood are you today. The possibilities are endless! I wanted the thing to be dead-simple to use. It's not connected to In ...

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Hot Yet? This faucet water monitor will prevent plunging your hands into cold water

Hot Yet? Attiny85 Faucet Water Temperature Sensor Testing Real life testing in the kitchen sink! Note the tri-color LED. Blue is cold and fades into Green which then flips to increasing Red at 85F.   Notes This project is an Attiny85 Arduino circuit and uses the Coding Badly attiny core available here: https://code.google.com/p/arduino-tiny/source/list For the AVR programmer, I used the Adafruit ZIF shield ...

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Chachka (Trinket clone)

Chachka is born! Chachka is an Adafruit Trinket CLONE built from the ATtiny85 microcontroller.  Because it is a current Adafruit product, it has a training guide and its own support forum and lots of sample code.  All of this means that like an Uno clone, the Chachka will be well supported with firmware and libraries and other users. The Trinket in itself, is not expensive.  But hacking is not about expense ...

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