in your gell cell charger page ... on the schematic ... D1 is drawn backwards. the way it's drawn it will let current flow from your PS back to the car but not from your car to the PS ...
you also want to move D1 either between the 'radio' and R1 like
this ... or between R1 and D2 like
this ... the first example is better at keeping current from draining backwards into your car's electrical system from your gell cell ... while the second circuit is better at giving your gell cell enough charging voltage ... however it allows a small amount of current leakage back into the vehicle.
just fyi .
hmmm ... ijust noticed something ... it's correct
here but not
here
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