DIY
- Wiring
- Schematic
- PCB
- Programming
http://fritzing.org/forum/thread/413/
Ref: https://www.youtube.com/watch?v=QGV4co25WhY&feature=youtu.be
Virtual Break Board (VBB) option:
Home: http://www.virtualbreadboard.com/
Pricing: http://www.virtualbreadboard.com/DocView.html?doc=WebShop/WebShop
Simulator: http://tutorial45.com/arduino-simulator-emulator/ (list of)
A Selection of the Best Arduino Simulators
http://www.falstad.com/circuit/