I have been following the EVSE from Modular power. It’s a 4 layer board, fairly complex, costs a lot and does not include power supply or implement any of the safety features.
If you were to buy the recommended parts, It would cost more than a basic EVSE. EVTV estimates $900.
EVSE board $240
UL J1772 cable $260
Power Supply $100
GFCI circuit breaker $117
Contactors $200
Case and misc parts
I am hoping to sell my EVSE controller board with power supply, with GFCI, implementing all of the J1772 safety features including the "diode check" for quite a bit less than $240.
I have been using the DIY EVSE for a several weeks as my primary EVSE. It is very reliable and stable. It runs very cool and draws almost no standby power (shows 0 W on a Killawatt).