Circuit Sketcher

Circuit Sketcher, is a digital design tool that allows you to experiment and play virtually with paper circuit components before using physical materials. Designed with educators and students in mind, Circuit Sketcher allows you to choose from a variety of connectors, LEDs, battery holders, switches, and more! In Circuit Sketcher you can move things around, test connections, receive immediate feedback in simulator mode, and even import your own artwork!

Try circuit sketcher at sketcher.chibitronics.com