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Need a redesign of the open source Open-evse pcb.
Open EVSE project here: https://code.google.com/p/open-evse/wiki/OpenEVSE_DIY_Plus_spec
Original pcb design available at this page.
- Add a max485 (with required components and screw terminals for A/B) for serial rs485 communication with the atmega.
- Add an input for additional Current Transducer for load measurement (with required voltage divider components) and connect as analog input to the atmega.
- Add additional headerpins for digital inputs to atmega for ttl card reader.