This device is a USB port tester that allows you to check any USB port of your computer. To check the operation of USB just plug it and if USB port is working correctly the green led should lit. Also you should receive a “New device detected” message on your operation system. The circuit is very simple to build using a few common components. Check construction details on the instructable link below.
USB tester - [Link]
This project will show you how to build a sound card for your PC using PCM2704 from Texas Instruments. Thanks to this IC in SSOP package is able to make a very small USB sound card.
Make a Sound Card with PCM2704 - [Link]
VIRTINS TECHNOLOGY just launched a new product RTA-168, a PC based real time audio analyzer. It consists of a measurement microphone, an XLR-to-USB converter, and PC virtual instrument software Multi-Instrument. An audio test CD is also included. All the components of RTA-168 can be packed into a small black soft pouch case provided and be carried together with your laptop or netbook. It is a handy tool for audio and acoustic measurements in both field and laboratory. Application examples are frequency response and distortion measurement of a loud speaker, room/car/auditorium equalization, noise monitoring and analyzing, etc. Combined with the computing power of a modern PC and the powerful virtual instrument software “Multi-Instrument”, RTA-168 provides unbeatable performance-to-price ratio compared with any other types of RTA.
VT RTA-168: PC based USB Real Time Analyzer - [Link]
This instructable shows how to build a USB powered LED lamp that can be switched on and off with a wave of your hand. Also learn how to make curved PCBs. [via]
How-To: Make a touchless switch LED lamp - [Link]
user indestructable @ instructables.com have build this project that is able to flash a led when there is an email on your email server. He writes:
The idea behind the eMail Light project is to indicate the presence of emails that are currently on my email server with a flashing LED. I am often not right at my desk and I would like to know if I have email. Or I am near my desk, but my screen saver has kicked in while I’m working on something that doesn’t involve a constant mouse wiggle. By making a little black box with LEDs that can be controlled by USB through a mail monitoring program, I can be alerted to the presence of email on my server.
eMail Light: LEDs show new email - [Link]
This project details a small & simple, but very powerful USB charger for your mp3 player, camera, cell phone, and any other gadget you can plug into a USB port to charge! The charger circuitry and 2 AA batteries fit into an Altoids gum tin, and will run your iPod for hours: 2.5x more than you’d get from a 9V USB charger! You can use rechargable batteries too. [via]
Minty Boost: Portable USB power - [Link]
Peter Allan writes:
The USB Hourglass combines a sand timer with a rotating mechanism and an optical beam through the center of the timer to observe the falling sand. The amount of light reaching a detector is digitized at frequent intervals and processed by a microcontroller to determine when to rotate the hourglass. [via]
USB Hourglass random number generator – [Link]
This submini USB scope is based on a Atmel Tiny45 cpu and cost less than 5€ with a homemade pcb. It has 2 analog inputs and can supply 5V ont the 4 pins header on the right. One of the inputs can be scaled down with the trim pot. The firmware in the Tiny45 is written in C and compiled with Winavr and usb source code from obdev.
Simple two channel USB oscilloscope - [Link]
The TiltStick is a small acceleration sensing device in form of a USB stick. It’s using a two axis acceleration sensor to measure acceleration (caused e.g. by motion and tilt). The device is emulating a USB joystick and can thus be used in conjunction with any USB equipped host (e.g. a standard PC or the Nokia N8XX family) without any special drivers.
TiltStick: USB acceleration sensing device - [Link]