This is a simple USB temperature probe that uses the AVR USB library by Objective Development (http://www.obdev.at/avrusb/). It is in large part built upon the EasyLogger example by Christian Starkjohann. Whereas EasyLogger would send the data values over a keyboard interface, this project uses a custom device class and reads values using the ruby-usb library.
Temperature probe using AVR-USB – [Link]
This project is able to power a USB device using two standard AA batteries and an electronics circuit. The circuit is based on LT1073 DC/DC converter to convert the 3V to 5V needed by USB. In that way it can power the USB device on the go.
USB Battery Pack – [Link]
This project is a USB infrared decoder based on PIC18F2550. Microcontroller process the IR signal and send it to the PC as keyboard commands.
USB infrared decoder – [Link]
- Raw infrared signal detector for frequency measurement
- Breakout area with all the unused pins, tap in and do something interesting
Check out the design on the link below.
USB Infrared Toy through-hole PCB – [Link]
This is a high tech Business Card that you plug directly on USB. There is a ATtiny85 microcontroller on the business card that becomes an USB keyboard pre-programmed to type out text when it detects that CAPS-LOCK has been pressed a few times. V-USB is used so that the ATtiny85 microcontroller can become an USB keyboard.
USB Business Card – [Link]
This project is a USB thermometer able to measure indoor and outdoor temperature. It’s a simple device able to demonstrate the USB peripheral on the PIC 18Fs. Device is using the 18F2550 28 pin microcontroller. Data is available to the PC through a virtual serial port.
USB Indoor / Outdoor Thermometer – [Link]
This project is a portable USB charger that uses a high efficiency switching regulator that runs at 85 – 94% efficiency depending on input voltage and load. It takes an input voltage from 8 to 16 volts and can run from anything from a 9 volt battery to a car battery. It also has 2 USB ports and easily charges 2 power hungry devices at once.
Dual USB Charger using LM2678 – [Link]
This project is an Infrared USB remote control keyboard based on PIC18F2550 microcontroller and TSOP4838 IR receiver module. Software is written on MikroC. IRK! enables you to use your LEARNING remote control to control any system that you can plug a USB keyboard into.
IRK! Infrared RC USB Keyboard – [Link]
This project is a USB IR remote controller for your PC. This receiver is based on PIC18F2455 and is plug and play. It receives, decodes signals from a remote control and emulates the received signals as keystrokes in a keyboard. It is recognized as a USB keyboard. It is compatible with Sony SIRC 20 bit protocol,works with LG and SKY universal remotes when they are configured as Sony DVD. [via]
USB IR remote control using PIC18F2455 – [Link]