Post by Deleted on Jun 4, 2014 22:37:24 GMT
Hi from "Down Under"
Ever since my early foray into using video camera's in astronomy (1988), I have, wherever possible, powered them from a 12 Volt Gel Cell of various capacities, 7 A/hr to 120 A/hr.
This means that the camera get pure clean ripple free regulated DC, the camera only draws what it requires automatically. This completely eliminates any mains hum or any other power pack induced interference into the camera and resulting images.
I only power from the mains those items that need 240 Volts, tower/desktop PC's, TV monitors unless 12 Volts etc. Both my observatory systems are equipped with a multi-feed 12 Volt supply from an 18 A/hr Gel Cell, which is kept trickle charge when not being used. This also means that when I take equipment out for public displays, open nights etc, I always have battery power for the cameras.
Power packs can be used (not my choice nor recommended as a personal matter) but they must be decent quality and regulated- NOTE-unregulated ones can easily pump out 18 Volts which is not good for a 12 Volt camera.
I generally power my cameras independently of any other 12 Volt equipment. Time is too precious to have it wasted by unwanted electrical noise induced from other equipment.
Mains powered equipment also all has one grounding point to avoid 50 cycle ground loop effects. When you have as much electronic equipment in an observatory as I have, this becomes important. Motors from mounts can produce back EMF, TV monitors can produce RF interference, and the list goes on.
Clear skies...
Shevill
Ever since my early foray into using video camera's in astronomy (1988), I have, wherever possible, powered them from a 12 Volt Gel Cell of various capacities, 7 A/hr to 120 A/hr.
This means that the camera get pure clean ripple free regulated DC, the camera only draws what it requires automatically. This completely eliminates any mains hum or any other power pack induced interference into the camera and resulting images.
I only power from the mains those items that need 240 Volts, tower/desktop PC's, TV monitors unless 12 Volts etc. Both my observatory systems are equipped with a multi-feed 12 Volt supply from an 18 A/hr Gel Cell, which is kept trickle charge when not being used. This also means that when I take equipment out for public displays, open nights etc, I always have battery power for the cameras.
Power packs can be used (not my choice nor recommended as a personal matter) but they must be decent quality and regulated- NOTE-unregulated ones can easily pump out 18 Volts which is not good for a 12 Volt camera.
I generally power my cameras independently of any other 12 Volt equipment. Time is too precious to have it wasted by unwanted electrical noise induced from other equipment.
Mains powered equipment also all has one grounding point to avoid 50 cycle ground loop effects. When you have as much electronic equipment in an observatory as I have, this becomes important. Motors from mounts can produce back EMF, TV monitors can produce RF interference, and the list goes on.
Clear skies...
Shevill