[jeffbee]

It's based on a square wave duty cycle, so you'd need something more like a '555. But yes, J1772 is designed to be dead simple and cheap to implement.

[amluto]

By the time you implement the rest of the protocol, you might as well have an actual microcontroller, at which point you don’t need the 555.

(Please don’t build an EVSE without the big relay and its associated safety controls. No one needs an outdoor cable supplying ~240V pin-to-pin that’s live while you hold it on a rainy day.)