An EV powering your whole home, or even pushing power back to the grid, is something higher-end EVs might do at some point ...

The Haasoscope Pro is an open-source hardware, high-bandwidth, and real-time sampling USB oscilloscope. Building upon its predecessor, the Haasoscope, the new Pro model offers a bandwidth of 2GHz, ...

and a couple of BNC sockets for output. Control is via a set of momentary action buttons, and there are a couple of potentiometers for level and DC offset. Finally there is a 2.1 mm barrel jack ...