The WIZnet WIZ550io-based LCDTV SERVER is a small device that plugs into the USB port of a LCD TV or portable DVD player, and allows it to stream media over the network from a file server. It does this by presenting itself to the LCD TV as a conventional USB flash memory, emulating the interface of a mass-storage USB device.
This project presents high performance distributed motion control system at extremely low cost. Rapid prototyping of multi-axis designs is often required during the development of automation equipment. One can use centralized controls with PC motion control cards, external amplifiers, and a tangle of wires, or utilize existing high cost distributed motion control system with RS485, Ethernet, or one of the fieldbuses (DeviceNet, CANOpen, Profibus, etc.). With the use of highly integrated microcontrollers, such as the PIC18FXX8, and power devices like the Allegro A3977/A3959, a very small and inexpensive system was developed.
Download
document and schematic
tag : motion control system, USB, PIC project src
This simple USB temperature probe uses the AVR USB library by Objective Development. The included ruby script reads the temperature and optionally logs it using RRDTool. The EasyLogger would send the data values over a keyboard interface. The project uses a custom device class and reads values using the ruby-usb library. The project primarily intended to be used in Linux, although it is possible to get it to work in XP with a bit of hassle involved.
Download
USB Temperature Probe Documentation
Term : AVR, USB, Temperature Project src
I2C-bus analyzer is a electronic project that has function to capture all transmissions via I2C/TWI bus, decode it and send to PC via virtual RS-232 port. Received data can be displayed by any terminal program on PC computer. The project use ATTiny2313 microcontroller with 20MHz crystal as main part. Link to PC are realized by FTDI FT245RL on UM245R module.
Download
This advance tiny USB battery powered charger is handy tools for your need. You can use it to charge almost all devices which are charged via USB, like iPods or mobile phones, with only two AA-Cells. The Most important compenent of the cicuit LT1301. This is a small step up converter for to build switching mode power supplys with only a few external components.
Download :
Schematic and document
tag : USB Charger, Battery Powered Charger, Small Charger (src)
I2c-tiny-usb made to provide a cheap generic i2c interface to be attached to the usb. It could be as simple and cheap printer port to i2c adapters. A USB solution has several advantages such as the built-in power supply and no cpu intense bitbanging is required on the host side. This USB solution even requires less parts than some printer port solutions. Although i2c-tiny-usb was developed under and for Linux but it also works under Windows and MacOS X.
The hardware the i2c-tiny-usb interface which is designed by Till Harbaumof consists of the Atmel AVR ATtiny45 CPU, a cheap and easy to obtain microcontroller with 4 KBytes flash (of which ~2k are used in this application) and 256 Bytes RAM. And few other parts surrounded the processor.
Download :
Source code, schematic and documentation
tag : USB project, i2c adapter, printer port adapter, avr project (src)
The circuit makes possible to realize a small MIDI expander using an old ISA-BUS soundcard. This microcontroller project based on micro PIC18F4320. Emilio, project designer, has tested on 2 different cards, and it should work for any card ADLIB OPL3 compatible (the I/O address MUST be 0x388).
The software responds to MIDI commands on Channel 1. The sounds are generated by the FM synthesizer built in the soundcard. The power is derived from two low-cost wall transformers (see picture) with variable output, set to 9V (the output is close to 12V).
Download :
Source code and schematic
search term : Midi expander, ISA BUS, Microcontroller PIC project (src)
This simple microcontroller project build to create a keyboard hack that is smaller and cheaper and better reproducible than what one would get when hacking a keyboard circuit. a perfect solution for when you only want to use one switch in your prototype. The project utilize ATTiny45 as main controller.
This 1-Key-Keyboard Project can be plugged into any computer and will be recognised as a standard USB keyboard. When closing the switch, the keystroke ‘]’ will be sent. When opening the switch, the keystoke ‘[’ will be sent.
Download : Source Code and schematic
related search : AVR microcontroller project, Simple Keyboard project, USB Interfacing (src)
The MAX3420 provides a very simple approach to adding a USB interface to a circuit. It uses a SPI bus to connect to your system. It does require a reasonable amount of configuration and control, so you'll need to connect it to some form of microprocessor/microcontroller.
Download PCB and Circuit in Eagle
related search : Digital Electronic Project, USB Controller (src)
This is a USB (universal serial bus) interface board which can be used to connect 8 (parallel) data lines to the USB. The interface comes with a small internal FIFO (384 byte Tx, 128 bytes Rx) and 4 handshake lines which make it suitable for interfacing microcontroller designs to the USB.
It can, also be used as simple 8bit IO when the so-called "bitbang mode" is enabled. Note. however, that in this mode, the bits will not come out in a constant bitrate but in chunks of 64 bytes with specified baud rate followed by a delay.
Download : schematic, source code 1, and source code 2
related search : Electronic Circuit Project, USB Board, Interfaceing (src)
If you want build your own (DIY) game controller it thing you can try this electronic project. This project uses an ATmega8 microcontroller from Atmel. The firmware implements a standard USB joystick with 4 directional buttons and 8 general purpose buttons. Some application from this project are :
No drivers required!
That's right, since the USB standard defines device classes. By using the human input device (HID) it will tell the computer that the connected USB device is a joystick and has 2 axis and 4 or 8 buttons. Another nice thing about this is that the adapter should work with all operating systems supporting HID devices.
Download : Schematic, Wiring Connection
tags : Microcontroller AVR project, USB Game Controller (src)
AVR-USB implements a USB device entirely in software, making it possible to build USB hardware with almost any AVR microcontroller, not requiring any additional chip.
Features :
Download
tags : Microcontroller Project, AVR, USB (src)
PIC-plot now goes to USB! A perfect low cost solution to quickly get screen plots of your GPIB instrument on your laptop PC without complex software. It emulates the HP7470A operation on the GPIB side, and outputs the HP-GL data at the USB port to be read and stored on the PC by any capturing software. GPIB addresses and other set-and-forget parameters can be configured by a simple Setup menu, then no Dip-switches are used. Power is taken from the USB port to simplify cabling and get rid of a DC adaptor.
The operation of this interface is not just limited to digital plotter emulation: any data intended to be received by a GPIB Device (addressable or listener only) can be captured from the instrument and brought out to the USB port, including raw measurement arrays or rasterized data for a graphic printer. It is based on a PIC16F628 microcontroller and an FT232R chip. PCB size is just 57x64mm.
[source]
I want to build high quality preamplifier with built-in DAC from SPDIF or USB for my power amplifier Leachamp. I tried to design DAC from USB with this circuit on one-sided PCB and I was successful.
Schematics is from datasheet of PCM2902. Circuit includes DAC and ADC, SPDIF output and input and HID part with 3 buttons for MUTE, VOL+ and VOL-. I used only DAC part. Other parts are not used. For high quality playback is needed to use external low-drop voltage stabiliser for DAC part. I used LP2951CM which was available at local store. Output voltage is set to about 3.7V with two resistors. Circuit board is designed regarding to good ground placement and separating of analog and digital ground. These ground are connected in one point at USB connector.
[source]
Download this guide to learn and understanding everything you need to know about the Raspberry Pi computer, system specs, the software it runs and the amazing project based on this little PC.
PEI is the leading magazine for the global electric power generation and transmission industry. PEI provides articles on new technologies and installations and analysis.
Subscribe Fof Free!
EDN magazine provides how-to solutions for design engineers in the electronics industry. Engineers turn to EDN because they know they will always find valuable design techniques that they can use to do their jobs faster.
Subscribe Fof Free!
More Free Engineering Magazine
