Quote:
Originally Posted by Barrykgerdes
Hi Gary
Using an old ATX power supply is not a very practical way of sourcing a regulated 5-12volt 5A supply. By the time you make a 5A regulator you may as well have started with a proper purpose built supply.
To run a camera using a PWM supply you will most likely run into noise from the switching. This type of supply is good for heaters, lights and motors but not more sophisticated electronic equipment. The most satisfactory method is a series regulator that will drop the voltage but of course waste the extra dropped voltage power as heat.
My son Trevor built a multi output regulator to drive his camera (Canon 1000D) and dew heaters using the output of a regulated 13.8v 5A supply that also drives the G11 with parts obtained from Jaycar. He can probably give you the design details. If your ATX has a 12v 5A output it will probably be suitable to drive the regulator but be careful those supplies are meant for indoor use protected by a computer case. Any ingress of moisture from outside use could be disastrous or even fatal.
Barry
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Thanks Barry,
The power supply sits in the observatory so theres little problem with moisture etc. The supply handles 5A ok at just over 11v.
The design details sound great Barry, just a rough circuit diagram should get me out of trouble! If I can adjust the voltage between the 11v to 7.5v I would be very happy!
Gary