power supplies

As you add more sensors, you may run into the problem of getting the error

"USB OVERCURRENT" This is because if you are powering the sensors from your USB port and it doensnt's allow very much current before throwing up the warning.

The fix is quite simple though: add an external power supply.

Anything between 5-9V should work.

You can get them at Maplin for about £19 LINK

Or you can order one from farnell for about £5 LINK
(I prefer the cheaper one, and the shipping is free and generally is next day)