09/09/2009 Progress

EV Charger

• Thoroughly checked Schematic and PCB against Breadboard (ie that identical)
• Re-created PCB with throttling control circuit.
• Created 5 x shunt circuit on a small PCB (in Eagle, free version) ... so to have professionally created (at a cost of under $30.00 for 2) by futurlec Australia. Saves printing, ironing, and drilling. Mainly the drilling (don't want to do that !).
• Following are images of the PCB, and the Schematic:

• Ordered from Futurlec. Lets see how we get on !
• DMM turned up today.  It is a Digitech QM1548, 40,000 count.
• Very useful, very good (very accurate) DMM. 
• Tested it - and very happy with result.
• Testing the Shunt circuit, there is a change of around 12mV up to 1.3A shunting.  This will do fine !
• This indicates I should select the "turn on" of the shunting, for 4.1 volts ... so the maximum possible "top out" is 4.22V, even if everything goes wrong with it.