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]
This is a tiny USB battery charger.With this tiny thing you can charge almost all devices that are charged via USB, like iPods or mobile phones, with only two AA-Cells.most important compenent of the cicuit presented in the next steps is the “LT1301″. This is a small step up converter for to build switching mode power supplys with only a few external components.
Portable USB Charger - [Link]
Pinguino is an Arduino-like board based on a PIC Microcontroller. The goal of this project is to build an integrated IDE easy to use on LINUX, WINDOWS and MAC OS X. Arduino is a powerful tool with some defaults. One of its inconveniences are a no native USB interface on the chip and its code length.
The IDE of Pinguino is built with Python. An integrated preprocessor translates specific Arduino instructions directly into C. This preprocessor reduces the code length and the execution speed. Pinguino hardware is based on a 18F2550. This chip has an integrated native USB module and an UART for serial link.
Pinguino – [Link]
On PC desktops the RS-232 serial ports are about to disappear from most computers (especially from laptops), replaced by the USB connection. This project was begun as a response to build simple ELM327 compatible USB adapter for On Board Diagnostic (OBD2) monitoring.
OBD2 ELM327 compatible AllPro adapter with USB - [Link]
Today i received in my mail box the µUSB-CE5 from 4Dsystems. This is a very nice and slim USB to Serial UART bridge. Some major features are: it’s cost effective, easy to use, small design and can plug directly on USB port without need any connector.
I needed this converter to use it with: uOLED-32028-P1T – 2.83″ Active Matrix OLED Module with Touch Screen
The design is based around the FT232RQ from FTDI and provides the user with multi baud rate serial data up to 3M baud rate. RX and TX signals are both 3.3V and 5V tolerant. Visit product page for more information.
uUSB-CE5: Slim USB to Serial UART Converter – [Link]
I want to build high quality preamplifier with built-in DAC from SPDIF or USB for my power amplifier Leachamp. I had available circuit PCM2902. I tried to design DAC from USB with this circuit on one-sided PCB and I was succesful.
USB audio DAC - [Link]
The MAX3420 is a USB peripheral controller chip with an SPI bus. This page hopefully contains enough information to help you easily make use of the device in your projects. 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.
MAX3420 – Maxim USB Peripheral Controller - [Link]
USB Ultra Infrared Receiver to remote control and power on/off the PC. The extended guide for the infrared receiver with hardware side function to remotely switch the PC on and off as full USB variant is now available and got the name “USB Ultra infrared receiver” or briefly “USB Ultra IR”.
USB Ultra infrared receiver - [Link]