Ubi Vis Where you Want, Latin

If you want electric chargers on every lamp post, a good place to start is making them cheaper than the lamp post! 

How do you make an inexpensive charger... think simpler.  I started the project trying to determine how I could do this with the simplest and least expensive component around.  The system must charge a Leaf at up to 30 miles every hour on common electrical supply ubiquitous in any structures electrical system.  The cheapest commercial system costs $750.  The only OpenSource/DIY project costs $300.

I built the prototype J1772 compatible Level-2 (120 or 240v up to 30A) for $77.54 total!  This same methodology could yield a commercially viable system for $40-50. 

Great, simpler; sure how?

• Uses the simplest controller, DigiSpark
• Does only charging; doesn't check for wildly unusual conditions (stuck relay, GFI, power.
• small electronic parts list; two transistors, 5 resistors and a diode
• Built the J1772 Socket, commercial units come at "non-standard" cost ($130+)
• Use commercially available electric parts (conduit, boxes, cord, etc)

Parts:

• DigiSpark
• J1772 Plug

• Relay

• Any 12vdc power supply (you have one lying around)
• 2-NPN Transistor
• Resistors (come in 5-packs)
• 5-1k
• 5-15k
• 5-10k
• ft 10/3 outdoor ruberized wiring
• 1-1/4" PVC conduit (45-bend)