12V 350mA question

[JOHNBOY42]

Gents, I have got a new CCTV camera but no power source came with it ..it states you need a 12v 350mA and I need to order one but the only place I can get them from is USA but can get 12v 500mA will this be ok or will it damage the camera.. thanks John

 

[Jackrae]

Get yourself down to maplins, they'll have a range of 12v supplies to suit. The mA value is what the camera demands, so anything that is capable of that or more is OK. A higher mA rating on the supply unit will not damage the camera. Just make sure what they offer has a regulated DC output - some cheap supplies have poor regulation (or none at all) and may well exceed the rating of your camera.

 

[sparkymarka]

What are you connecting the camera to ?

 

[JOHNBOY42]

What are you connecting the camera to ?

DVR... why

 

[JOHNBOY42]

Get yourself down to maplins, they'll have a range of 12v supplies to suit. The mA value is what the camera demands, so anything that is capable of that or more is OK. A higher mA rating on the supply unit will not damage the camera. Just make sure what they offer has a regulated DC output - some cheap supplies have poor regulation (or none at all) and may well exceed the rating of your camera.

Looked at the maplins website and you can get 300ma or 500ma....will the 500ma be ok??

 

[JohnW2]

Looked at the maplins website and you can get 300ma or 500ma....will the 500ma be ok??

Yep - as you've been told, anything above 350mA would be fine.

It's almost certainly a silly question (since the answer is almost certainly 'yes'), but I take it you are sure that the power supply required is 12V DC?

Kind Regards, John

 

[JOHNBOY42]

Looked at the maplins website and you can get 300ma or 500ma....will the 500ma be ok??

Yep - as you've been told, anything above 350mA would be fine.

It's almost certainly a silly question (since the answer is almost certainly 'yes'), but I take it you are sure that the power supply required is 12V DC?

Kind Regards, John

Thanks John.. it is just that I am a bit clueless on these matters.

 

[sparkymarka]

Just that , if your camera has come from America it may NSTC standard not PAL . Will your Dvr support it ?

 

[JohnW2]

Thanks John.. it is just that I am a bit clueless on these matters.

You're welcome.

As you've been told, the 'current rating' of a power supply is just a statement of its maximum capabilities - provided the voltage is correct, the load in question (camera in your case) will simply draw as much current as is needed. Think of it in terms of wanting a hoist man enough to lift your 100 kg car engine. One rated for lifting "100kg maximum" would be fine, but so would one rated for lifting "200kg maximum" (or whatever).

Kind Regards, John

 

[JOHNBOY42]

Just that , if your camera has come from America it may NSTC standard not PAL . Will your Dvr support it ?

sparky... bit lost here the spec says nstc 976h =494v pal 976h 582v

 

[JohnW2]

sparky... bit lost here the spec says nstc 976h =494v pal 976h 582v

It sounds as if you should be OK then. Whatever else, your DVR ought to be able to handle 976 x 582 PAL. Do I take it that the camera is switchable between NSTC and PAL?

Kind Regards, John

 

[securespark]

I take it you mean NTSC?

National
Television
System
Committee

US (amonst others) TV has since moved on to ATSC (Advanced), but NTSC is still used for video and CCTV.

 

[securespark]

Just that , if your camera has come from America it may NSTC standard not PAL . Will your Dvr support it ?

sparky... bit lost here the spec says nstc 976h =494v pal 976h 582v

That's the pixel density.

 

[ban-all-sheds]

I take it you mean NTSC?

National
Television
System
Committee

Ever seen it?

It stands for Never Twice the Same Color.

 

[JohnW2]

I take it you mean NTSC?

I'm certainly guilty - I seemingly subconsciously copied the typos in the quotes that were in front of me

Kind Regards, John