First I want to say that this is my first instructable and I didn't take many photos.
also I got the idea from: USB controlled mini lava lamps by jamesh
this is a device that turns lights (or what ever) on with the push of the caps num or scroll lock
if you want you can use an xbox DVD remote with your computer and turn on your lights with that. so you can walk in to the room and push a button on the remote and the lights turn on
Waning. this instructable involves working with high voltage mains power, I take no responsibility if things go wrong.
Step 1: Get the Parts
3 transistor BD140
3 capacitors 10-60uf
3 resistors (so the LEDs don't burn out. unfortunately I forgot there value)
3 relays (the ones with 5 legs)
3 switches (single pole double throw) 240v (120 in the US)
1 (single pole single throw) switch 240v (120 in the US)
A keyboard with num caps and scroll lock lights
7 (or more) meter extension lead
2 power sockets (see picture)
xbox dvd remote
small blank circuit board
Step 2: Opening (and Modding) the Keyboard
then locate the lights and solder the wires to the legs of the LEDs (see picture)
when done put the keyboard back together. you may need to cut a hole for the new wire to get out
important note: not all keyboards work with this
Step 3: Prepare the Cord and Box
drill 4 holes into the side of the box
shove the grommets in to the holes
tread the cords trough the grommets (spit helps)
strip the wires (the end thats in the box)
Step 4: Put the Socets On
now its time to put the sockets on the cords that don't have any.
the sockets should have instructions on how to wire them
Step 5: Electronic Bits
I was too lazy to make a PCB so i soldered wires to the components
Step 6: Put Every Thing in the Box
make sure all the wires in the box a insulated
Step 7: Plug It In
plug a lamp (or something) into one of the sockets and plug the keyboard into the computer
then plug the power in and turn on your computer if nothing explodes, good.
now the lamp should flash as the computer boot (this is normal)
when the computer is done push the caps num and scroll lock buttons, an led should light up for each button.
if it doesn't than open it (unplug it first) and check all connections.
if all the lights turn on when you only press one button, than check the connections if that doesn't help than it may be the keyboard, not all keyboards work with this
Step 8: Optinal Stuff
its hard to explain so just look at the pics
Step 9: Software for the DVD Remote
once you have installed the software, plug the sensor into the USB port, it should say it found new hardware. if it says "USB device not recognizing" than try moving the connection.
once the hardware is installed run XBCDRC (should be in start menu)
then choose what buttons control num caps and scrol locks
(this picture was taken on an XP computer)
Step 10: How to Use It
the switches on the front are wired in a double switch so you can manually turn on or off the lights
the single pole single throw switch is to disable the lights.