Have you built, or have you got a wicked scheme to build, an electronic gizmo you might want to sell? Today we’re launching our first “Gadget Freak” contest, seeking the cleverest, best-documented, and most marketable homemade gadget build. Details are available on the contest landing page, but here’s the gist of it: The first place winner gets a thousand bucks plus a chance to sell their winning gadget as a kit through Makers Market. Second- and third-place winners get $500 and $100, respectively. “Gadget,” for contest purposes, means a device, involving electronic components, with sensing, motion, timing and/or networking elements. Entry form is here. Runs through July 13, California time. Co-sponsored by the good folks at Alibre, Allied Electronics, and Texas Instruments.