For possible uses for the sick or impaired, see step 8.
The video below shows the ring being used to control a robot ant to pick up a block.
or go to youtube at: http://www.youtube.com/watch?v=tbazbiOjS9k
Step 1: Materials
Total cost of parts is about $45 US not including shipping
Available from www.hvwtech.com/
08m SOIC Picaxe microcontroller
Available from www.pololu.com/
MMA7260QT 3-axis accelerometer
5 volt boost regulator
Available from www.mouser.com
3mm blue LED
CR1220 3volt lithium battery and holder
30 gauge magnet wire
Available from www.allelectronics.com/
solid line perfboard
1" key chain ring
Step 2: How It Works
The numbers are then used in the programming to send infrared signals by pulsing two infrared LEDs just as a standard TV remote control does.
To see how to build a Picaxe infrared receiver that can use these codes to control a robot see:
For other remote control and Picaxe projects see here: http://www.inklesspress.com/picaxe_projects.htm
Step 3: Power Supply
The Polulu 5 volt boost regulator is a dc to dc converter that is the smallest one I have seen which will supply a constant 5 volt output. It will work with any battery input between .8 volts to 4.5 volts. It can output up to 200 ma.