Update on low cost power supply....
I have modified my power supply, to be able to operate with lower voltages input, (I think) Instead of having a maximum output voltage of 12volts I have modified the circuit to give 13.3, (is this too high) Now, with a 12volt input, it outputs 11volts, with a 400ma load. And will output over 12volts with as little as 13volts input. BUT!!! for some reason, when the car is off, the voltage is too low, and drops below 10.5volts when stinning up a CDrom drive (48X)
Any help would be good, and BTW, in the other thread, I didn't really want opinions about what I was doing, but about my circuit board and power supply design..