You’ve probably seen the article about the Asus Eee PC and what can be integrated inside it’s case. But after you’ve done some modding and added different devices your battery probably doesn’t last as it was intended to last, so if you need to charge it in the car you either buy a commercial adapter or you make it.

This projects shows details on how to build an Eee Pc car charger. There are actually a small number of parts so the whole cost should be small.

ASUS Eee Pc Car Charger: [Link]

The muscle powered Dice is based on Faraday’s law, consisting of a tube with cylindrical magnets. The tube is wound with a coil of magnet wire. As the tube is shaken, the magnets traverse the length of the tube back and forth, thus changing the magnetic flux through the coil and the coil therefore produces an AC voltage which is used to drive the electronic dice. Pretty simple now that you know how it’s done

Electronic Batteryless Dice: [Link]

In my opinion a very original idea, because I’ve never seen a eletronic stethoscope. And besides the originality you’ve got functionality which is great. The stethoscope gets the sound trough a microphone place inside the classic stethoscope sensor. The temperature and pulse are showed on a 3 digit 7 segment display.

Electronics Stethoscope With Pulse and Temperature Readings: [Download Project] – [View PDF]

This schematic is ment to digitally display the output of an electronic Swissflow SF800 flow sensor. This sensor puts out an open collector square wave signal (like a fan RPM monitoring signal) between 50Hz (=0.5 liter/minute) and 2000Hz (=20 liter/minute).

By dividing the measured frequency by 10 and putting the decimal point at the right place you get directly a display in liter/minute. I don’t use the first digit output (output D) from the 74C925 to obtain a display of 10 to 9990Hz or xx.x liter/minute.

3-Digit Frequency Meter: [Link]

Mobile infrared electronic transmitter

This project scans a 180 degree area from about 6 to 21 inches (15cm to 53cm) away and displays the information on a color LCD. To do this is uses. An infrared distance sensor from Sharp and an ultrasonic sensor from MaxBotix. This project is a short range, infrared and ultrasonic scanner that uses a standard hobby servo to move the sensors and a color LCD screen to display the information from the sensors. The information displayed on the LCD is an overhead view of the scanning area, with increments of distance from the sensors. 

ATMEGA32 Based Infrared and Ultrasonic Scanner: [Link] – [via]

The Electronic Mini-Badge is a PIC24FJ64GA004-based electronic badge that displays color slideshows. Many electronic badges display scrolling text using a matrix of discrete LEDs. This low-power system features a graphical OLED display and can be easily upgraded to handle animation, video, or RF communication.

I’ll have to take a look over this circuit’s schematic to see if i can easily adapt it to a Nokia 6100 LCD display, because i happen to have one, and it would be a nice project.

Electronic Badge Displays Color Slideshows: [Download Project] – [View Project PDF]

The handy Butterfly GPS is a cost-effective system that presents location, date, and time data on its LCD. The system features an ATmega169 and a highly sensitive GPS receiver engine board based on the SiRF chipset. Its amazing what you can do with such a low cost development board.

AVR Butterfly GPS System: [Download Project] – [View Project PDF]

This system automatically switches from one ADSL modem to another every time there is a link failure. The ATmega16 monitors network connectivity over Ethernet. When a failure occurs, it automatically powers off the primary ADSL modem and powers on the secondary ADSL modem.

ADSL Fault Tolerance System Keeps You Connected: [Download Project] – [View Project PDF]

Were starting to see more and more green designs, which is nice, some people are really concerned about the planet we live in. The PowerBox is part of the Cornell University student projects 2008, and its main goal is to calculate and report the following parameters:

• Real power
• Apparent power
• Power factor
• RMS Voltage
• RMS Current
• Frequency
• Energy usage (Kilowatt-Hours)

All of the data is gathered by a C application which shows real time graphs and data display. Another feature of the PowerBox is that it features a remote switch that allows the computer to turn the power on or off and set wattage limits for auto shutdown. This way people can monitor and control their energy usage. Good job Cornell students.

Monitor And Controll Your Energy Usage With PowerBox: [Link]