This product can now be purchased at www.ghielectronics.com. This sensor measures light intensity. Requires socket type A. .NET Gadgeteer compatible cable is included. Resources Source Code External Links you need to download the following software to start your Gadgeteer: Development tool : Microsoft Visual C# Express 2010 Micro framework: Microsoft .NET Micro Framework 4.1 SDK The Gadgeteer core, mainboard SDk and module driver(GHI) You can download these tools at : http://tinyclr.com/support