Interfacing(USB – RS232 – I2c -ISP) Projects

USB RFID Reading Keyboard using USnooBie

video USB RFID Reading Keyboard Demo   This is a step by step tutorial on how to build a RFID tag reading USB keyboard using the USnooBie. This tutorial is provided with the project files. The code files are heavily commented with references to relevant documentation. Watch the two part videos below to see how […]

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I2C Bus for ATtiny and ATmega168

I love the Atmel AVR microcontrollers! Since building the Ghetto Development System described in this Instructable, I’ve had no end of fun experimenting with the AVR ATtiny2313 and the ATmega168 in particular. I even went so far as to write an Instructable on using switches as inputs, and extended the Ghetto Development System concept to

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16-key Keypad Decoding with an AVR MCU

This instructable will show you how to interface a 16-key keypad to your AVR microcontroller and read the key when a key is pressed. I’ll introduce the keypad first, then the 74HC922 16-key decoder IC as a pin-saving mechanism, then finally how to take the data and massage it so that you get the correct

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Using Arduino to communicate with embedded project using AVR ATMEGA microcontroller

Building a stand-alone AVR ATMEGA project sometimes leaves you with no easy to read output from your project. But you can use an Arduino to act as a communications bridge between your embedded project and your PC’s Serial Monitor program! I’m building an embedded multi-channel thermocouple reader/datalogger, which has a lot of connections and soldering,

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Atmel Xmega USB/Serial Arbitrary Waveform Generator

This instructable walks you through programming and using the Boston Android Xmega evaluation board to work as a simple arbitrary waveform generator taking advantage of the integrated 12bit DAC and high speed DMA controller. I have provided precompiled firmware as well as source code which can be loaded onto the device and configured via a

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USB controlled home automation hack using Microcontroller ATmega8

Hack a wireless home automation system to be USB controlled using two AVR microcontrollers! Check out the video! The system is really more responsive, but the browser on my phone is slow. Skills ans tools There are two ways of hacking an RF remote to be controlled by a computer or a microcontroller. The lame

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Relais Board Using AT2313

Description This is a peripheral board with 4 relais, rated at 5A/250V each. The board has a ML10 output connector for connection with the AT2313 Project board. It has also 4 LED’s for indication which relais is switched on. Hardware The circuit is simple, it consists of no more then an ML10 connector, a ULN2803A,

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USB PCB Business Card

USB PCB Business Card Using ATtiny85 Microcontroller

This is a business card that will type out some text when you plug it into a USB port. It uses a ATtiny85 microcontroller with V-USB based code to emulate a keyboard. The typing is triggered by the CAPS LOCK status LEDs being toggled 3 times. This instructable will focus on using CadSoft EAGLE to

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