Silvashadow
Senior Heliman
Location: Bexley, Kent, UK
| Blackhawk,
I am guessing that your power supply is shutting down becouse it is seeing the low impedance of your charger as a short circuit. I know my bench supply does this occasionally.
You cannot put your multimeter across the terminals to measure the current. This is almost a dead short and the power supply will either shut down or fry. Try putting a 12V, 60w car headlight lamp on the output and measure the current. It should be 5A.
You do not say what wattage the lamps are you have connected to the 5V rail nor wherther they are in series or parallel. You should only need one lamp of around 12V, 12w.
Finally, I built two of these, one from an AT supply and one from an ATX supply. The 12V output on a 'scope was not as smooth as you would imagine, the ATX unit showing a high frequency fluctuation between some 11.2 and 11.8 volts.
Finally as, JB_Turner says, I bought a suitable regulated 13.8V bench supply which I use for my Simprop Intelli-control and Pro-Peak Prodigy chargers. |
