[SFDXA] CircuitLab: Sketch, simulate, and share schematics

[Bill]

Thanks to Tony N2MFT:
 From QRZ

Anyone who has ever tried to use SPICE and its extensions to simulate 
electronic circuits is likely to have met a great deal of frustration. 
Now, CircuitLab has deployed a web-based application that enables users 
to whip up their own simulated electronic circuits and test them. This 
ought to be a boon for technically inclined amateur radio operators!
https://www.circuitlab.com/