Quick AVR - An AVR development board

Posted on 02 Oct 2008

Quick AVR - An AVR development board
This is for those of you that want a quick prototyping system that will plug into a breadboard without taking up too much space. It will mount at a 90 degree angle to the breadboard like a video card on a computer motherboard.[more]


Posted in : AVR projects

ARobot Light Detector

Posted on 15 Jul 2008

ARobot Light Detector
ARobot Light Detector
This application explains how to make a light detector for ARobot. This can be used to tell when a light is on or off, whether the robot is inside or outside, or for light following. This is a simple expansion and does not require soldering if using a breadboard. It does assume that you have attached a breadboard and an expansion cable to the ARobot (see the breadboard/perfboard application note). This circuit and the light sensor could be mounted and soldered to a perf board and located to a movable head. [more]

Posted in : robot projects

Standalone AVR Music Player “Sound Bug”

Posted on 08 May 2008

Standalone AVR Music Player “Sound Bug”
Using the term ‘music’ liberally here, it will play a squeaky, but recognizable stream of audio, generated from MIDI files.It’s a satisfying little project that is a nice change from the typical beginner embedded controller blinking LED project(s).You can’t get any simpler than this: a piezo buzzer, a power supply (3×1.5 AA), a breadboard, and an AVR (ATmega16, but almost any will do).To make new music files, you’ll also need Perl and a program such as MIDICSV to convert the files.[more]

Posted in : AVR projects | Sound related projects

Experimenting with Wireless Transmission

Posted on 05 Apr 2008

Experimenting with Wireless Transmission
This simple circuit demonstrates wireless transmission. You can send Morse Code
signals over distances of a few meters to any AM radio. The antenna is created by winding 3 meters of wire on two 12 cm sticks secured 6 cm apart. Any wire is OK for the antenna.The switch is constructed from a small piece of aluminum cut from a cookie sheet and all of components attached to a piece of wood(the antenna, breadboard and switch). [more]

Posted in : RF projects

Digital QRP BreadBoard

Posted on 03 Apr 2008

Digital QRP BreadBoard
The Digital QRP BreadBoard is an evolving homebrew project being designed and presented in this column, serving as a general purpose QRP accessory that can be used on the operating bench and in the radio shack in a variety of ways. Approximately 6″ x 9″ x 1.5″ in size, this project contains a number of peripherals that QRPers find useful in applications around the shack – an LCD, shaft encoder, DDS chip, audio amplifier, RS-232C serial port, general purpose I/O buffers, and a daughterboard expansion port all provide convenient design flexibility. [more]

Posted in : RS232 related

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