This is a standard DC power jack that can be mounted on a chassis for your next hobby electronics project. Measures 2.1mm.
Build a model car that runs on hydrogen gas using a unique reversible fuel cell!
Build a model green house and 9 other green energy-related devices with this great kit!
Explore the wonders of wind power with this amazing kit!
This is a classic demonstration toy of the powers of magnetic fields!
A beautiful desk toy for your favorite person’s office!!
This project book and sample kit introduces you to shape-memory alloy technology!