resistor • Tech Projects

Programming AVR ADC module with WinAVR using Atmega8 microcontroller

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Most of AVR microcontrollers have Analog to Digital Converter (ADC) integrated in to chip. Such solution makes embedded designers life much easier when creating projects and programming them. With no need external ADC PCB takes less space, easier to create programs – it saves time and money. As an example lets take Atmega8 microcontroller which […]

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Sensor Interfacing using ATmega8 microcontroller

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If you’ve ever tried to hook up a 3.3V sensor to a 5V micro, you know what I’m talking about – connecting these two can be a problem! There are several ways in which a 3.3V device can be safely connected to a 5v microcontroller. This tutorial will detail a few ways in which this

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RSS Reader using ATmega8 microcontroller

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I spent part of an afternoon developing a hardware RSS reader (most of my time was spent on the python side of things). It’s pretty simple and uses an AVR microcontroller connected to a computer via a serial cable. Hardware I am using the Dragon Rider 500 as a development board. This provides all of the hardware

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ODB-II Automotive data interface using Atmega644

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Our goal for this project was to build an OBD-II compliant device that would communicate with any OBD-II enabled car and read back real time data as well as perform basic performance testing and diagnostics. If you’ve ever had to take your car into the shop because of the dreaded “Check Engine” light, you can

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DIY – Waveform Generator using AVR Microcontroller Using Atmega

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To interface 8-bit DAC with AVR microcontroller ATMega32 and generate different waveforms like Square Wave, Sine Wave, Triangular Wave, Staircase Wave and Saw-tooth Wave. Instruments · AVR Development Board · ADC – DAC card · Digital Storage Oscilloscope (DSO) · Power Supply Apparatus · Connecting Wires · CRO Probes · General purpose PCB Components · AVR

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AVR ATtiny USB Tutorial Part 2

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This is the second part of my USB tutorial for ATtiny2313 and V-USB library. In the first part we learned how to get 3.3V from USB to power our circuits. In this part, we will expand our setup with following parts: Larger breadboard and additional jumper wires ATtiny2313 12 MHz crystal oscillator Two 27 pF ceramic capacitors

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Mechanized Android Figure using Microcontroller ATtiny44A

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These Android figures are cute, but they don’t actually do anything. Let’s change that. Have a look at the video: These are the steps to make an Android that reacts to sound, moves it’s head, sends out Morse Code messages and displays some cool light patterns. In the video the LEDs in the body are

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Wireless Drawing Device Using Atmel Mega163

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Introduction: For our final project, we want to build a wireless drawing device. The user uses a keypad or a mouse to draw on the TV through a wireless communication medium (RF – 433.92 MHz). The user should be able to move the drawing pointer to anywhere within the four border lines. One should also

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Wireless Keyboard Using Atmega32

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Introduction: For our project, we designed a wireless keyboard that uses RF to transmit signals to the computer. In our design, we use a regular, 102 key ps/2 keyboard and connect it to our transmitter circuit. On the computers side, we connect our receiver circuit to the ps/2 port on the back of the computer.

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Integrating Wiznet W5100, WIZ811MJ network module with Atmel AVR Microcontroller

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The rapid penetration of the internet networks into many of today’s modern homes and personal gadgets (e.g. smart phone and smart pads) opening a tremendous useful and interesting embedded system application that could be integrated into our house or known as the intelligent house. For example by putting a small embedded system web server in

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