Our project was mainly designed for the Cornell Mars Rover project team (CMR), which will be using the robotic arm for competition to complete many different tasks in the deserts of Southern Utah. For our ECE 4760 final project, we created the control systems for a robot arm that is able to use three different […]
Introduction This project aims to implement a cost-effective wave player based on AVR (ATmega / ATiny Series) with CD-Audio Quality, which can play 8-bit/16-bit Mono/Stereo standard RIFF (Resource Interchange File Format) wave files. This project can be applied into many applications such as bus / subway auto-annoucing system, elevator voice indication system. Current solutions to
AVR 16bit Stereo Wave Player Read More »
The stepper motor is an electromagnetic device that converts digital pulses into mechanical shaft rotation.Most common types of stepper motor can be bipolar or unipolar, depending on the winding. To make a stepper motor move, motor windings must be loaded in the correct order. A stepper motor move at steps, it’s accuracy is usually expressed
InLinea01 is a simple PID controlled line following robot. This is not speed oriented line follower, this is just a prototype I built to experiment with this type or machines, though it can be the first step to build a faster one. The goal of a line following robot is follow a line that is draw
InLinea01: A PID controlled line following robot build on an ATmega 8 Read More »
This “Get Ready For Win98” Laser Engraving Machine it’s built using an old scanner, and an old printer. A laser engraving machine is a tool that uses lasers to engrave an object. I’ve an old broken scanner and an old printer lying around. Inspired by this instructables project: http://www.instructables.com/id/Frankenstein-Laser-Engraver/ I decide to build a bigger version of
A DIY A4 Laser Engraver made from a scanner and a printer on ATmega328 Read More »
A CT (Current Transformers) sensor is a device used to measure alternating current. A CT sensor, like other current transformers is made by a primary winding, a magnetic core and a secondary winding. The primary winding is often a single wire passing through the main core of the transformer. The seconday winding is used to
CT Sensor on AVR ATmega Read More »
Xively (formerly Cosm and before that Pachube) is a platform devoted to simplifying the interconnection of devices and data with applications on the Internet of Things. It is an on-line database service allowing developers to connect sensor-derived data (e.g. energy and environment data from objects, devices & buildings) to the Web and to build their
A web configurable Xively logger, build on AVR ATmega328 Read More »
MQ135 is an Air Quality Sensor suitable for detecting of NH3, Alcohol, Benzene and other gases. The description below, is what i derive from the poor datasheet of this sensor, it may be uncorrect, so if you have suggestions please leave me a feedback. The “sensitivity characteristics of the MQ-135” figure of the datasheet, you
Cheap CO2 meter using the MQ135 sensor with AVR ATmega Read More »
Brushless electric motor (BLDC motors) are synchronous motors that are powered by a DC electric source via an integrated inverter/switching power supply, which produces an AC electric signal to drive the motor. Additional electronics control the inverter output amplitude and waveform (and therefore percent of DC bus usage/efficiency) and frequency (i.e. rotor speed). Because the
A simple brushless sensored motor driver for AVR Atmega Read More »
Here is a very simple project of controlling a small DC-motor (taken from an old personal cassette player) with ATmega8. The ATmega8 is having three PWM channels, out of which two are used here. PWM waveforms are fed to MOSFET (RFD3055) H-bridge. Here, direction is controlled using a two-position toggle switch and speed of the
PWM Motor Driver with MOSFET H-Bridge and AVR ATmega8 Read More »
