thomash85715 wrote: ...I don't want level 2, just programmable level 1...
Here's the J1772 overview, and I'm sure some googling will provide you with schematics so you can design and build to suit your needs if you can't further reverse-engineer this Panasonic unit after going through both this forum and the Leaf forums. https://en.wikipedia.org/wiki/SAE_J1772
Look further, and for less time and effort you might find a really inexpensive 120vac 12A EVSE if you want more current, especially if you don't care about UL certification; however, beware, as worn-out 120vac wall outlets or cheap plugs may not handle 12A steady-state comfortably (ideally they shouldn't even get warm, and NEVER hot). The stock 8A provides a much better safety margin if you don't need the charging speed.
I don't understand your aversion to 240vac, as at some point you'll be wanting a quicker recharge during the day and you may want to invest in either a dedicated L2 EVSE or the EVSEUpgrade. Do you not have 240vac available at home?
Speaking of "Ingineer" Phil, in the early Leaf days he was a terrific source of information and was extremely helpful to everyone (he often came to the BayLeafs meetings). You should have seen his trailer-mounted turbine-powered range-extender. I, for one, do not mind supporting his little EVSEUpgrade.com company, and I consider his current-adjusting implementation to be simply brilliant.