Power Supply
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 18CH 18 Channel CCTV Security Camera Power Supply Box 12V DC $46.99 Time Remaining: 23d 23h 6m Buy It Now for only: $46.99 |
 Crestron Model CNPWS 75 100 250V 23A 50 60 Hz Power Supply $38.00 (5 Bids) Time Remaining: 31m |
 Q SEE QS1008 Power Supply Box with INTEGRATED Power PlugsSIMPLE INSTALLATION $48.99 (1 Bid) Time Remaining: 1h 22m |
 8CH Power Supply CCTV CCD Camera 8 Port 12V DC+Pigtail $17.99 Time Remaining: 14d 8h 2m Buy It Now for only: $17.99 |
 Wearnes Model WDS050120 Wearnes DVR Power Supply w Power Cord $25.99 Time Remaining: 2h 35m Buy It Now for only: $29.99 |
 Power Supply Box CCTV CCD Camera 9 Port 12V DC+Pigtail $41.99 Time Remaining: 7d 20h 7m Buy It Now for only: $41.99 |
 12v 05A Power Supply Adapter for CCTV Security cameras $4.88 Time Remaining: 3h 4m |
 9CH 9 Channel CCTV Security Camera Power Supply Box 12V DC $36.99 Time Remaining: 23d 23h 10m Buy It Now for only: $36.99 |
 12V CCTV Camera AC Adapter Power Supply Box 8 9 10 Port $18.99 Time Remaining: 3h 4m |
 16Ch 18CH CCTV security camera power supply box 12 V DC $54.99 Time Remaining: 5d 5h 59m Buy It Now for only: $54.99 |
 Class 2 Power Supply Ac dc Adaptor Model JY15 140 103 UD Input 100 240V 50 60HZ $8.99 Time Remaining: 3h 44m |
 8 Port AC ADAPTER POWER SUPPLY BOX CCTV CAMERAS 8CH 12V $17.99 Time Remaining: 10d 4h 26m Buy It Now for only: $17.99 |
 2X Security CCTV Surveillance Camera DC12V 1A 1000mA Power Supply Adapter $5.00 (1 Bid) Time Remaining: 4h 8m |
 16 Power Supply Box CCTV Camera 18 Port 12V+Pigtail bpx $44.95 Time Remaining: 6d 14h 27m Buy It Now for only: $44.95 |
 Crestron CP2E Controll Processor and power supply $228.05 (6 Bids) Time Remaining: 5h 17m |
 8 CH Power Supply Box CCTV Camera 9 Port 12V+ Pigtail $42.99 Time Remaining: 13d 7h 24m Buy It Now for only: $42.99 |
 2X Security CCTV Surveillance Camera DC12V 1A 1000mA Power Supply Adapter $5.00 (1 Bid) Time Remaining: 7h 7m |
 16 Power Supply Box CCTV Camera 18 Port 12V DC+Pigtail $53.99 Time Remaining: 25d 6h 13m Buy It Now for only: $53.99 |
 4 CHANNEL CAMERA 12V DC CCTV SECURITY POWER SUPPLY PIGTAIL SURVEILLANCE 12VDC RT $9.60 Time Remaining: 7h 13m |
 4CH Power Supply CCTV CCD Camera 4 Port 12V DC+Pigtail $15.98 Time Remaining: 13d 7h 29m Buy It Now for only: $15.98 |
 USB AC Power Supply Wall Adapter MP3 Charger EU Plug $0.49 (1 Bid) Time Remaining: 7h 22m |
 Power Supply CCTV CCD Camera 8 Port 12V DC+Pigtail $17.99 Time Remaining: 7d 20h 6m Buy It Now for only: $17.99 |
 New 12V DC 500 mA regulated switching power supply for CCTV camera $2.99 Time Remaining: 7h 39m Buy It Now for only: $3.99 |
 8 CH CCTV security camera power supply box 9 CH 12 V DC $38.99 Time Remaining: 5d 6h 2m Buy It Now for only: $38.99 |
 New 12V DC 1000 mA regulated switching power supply for CCTV camera $3.99 Time Remaining: 7h 40m Buy It Now for only: $4.99 |
 16CH 18CH 12V DC 12AMP Power Supply Box for CCTV Security Camera $52.95 Time Remaining: 22d 10h 45m Buy It Now for only: $52.95 |
 Aiphone PS 1820UL Power Supply $40.00 Time Remaining: 8h 4m Buy It Now for only: $69.00 |
 2X Security CCTV Surveillance Camera DC12V 1A 1000mA Power Supply Adapter $5.00 Time Remaining: 8h 8m |
 12V 5A DC Adapter Power Supply Box 4 CCTV Camera DVR $15.99 Time Remaining: 6d 23h 48m Buy It Now for only: $15.99 |
 16 Channel CCTV Power Supply AUTO FUSE NEW Security Camera DVR 10AMP 100 240VAC $25.00 (1 Bid) Time Remaining: 8h 49m |
 Pyramid PS52KX 46 Amp 1000 Watts Power Supply w Built in Cooling Fan $163.95 Time Remaining: 4d 2h 18m Buy It Now for only: $163.95 |
 9 Channel CCTV Power Supply AUTO FUSE NEW Security Camera DVR 5AMP 100 240VAC $15.00 Time Remaining: 8h 49m |
 5V DC Power Supply 21mm For CCTV Camera 1A in US $4.94 Time Remaining: 20d 20h 33m Buy It Now for only: $4.94 |
 2X Security CCTV Surveillance Camera DC12V 1A 1000mA Power Supply Adapter $5.00 Time Remaining: 9h 8m |
 CCTV security camera power Supply 110 VAC OUTPUT 9 ch Channel 12VDC UL CE $49.99 Time Remaining: 22d 4h 43m Buy It Now for only: $49.99 |
 2eaPLUG IN CLASS 2 TRANSFORMERS 12VDC 500mA HON KWANG NEW IN BOX POWER SUPPLY $2.00 Time Remaining: 9h 15m |
 16 Channel CH CCTV Security Camera Power Supply Box 12 V DC $52.95 Time Remaining: 24d 12h 12m Buy It Now for only: $52.95 |
 ITE Power Supply Delta Electronics ADP 36ECH C AC DC Adapter output 12 V 3amp $7.99 Time Remaining: 9h 20m Buy It Now for only: $14.99 |
 Regulated 12V DC 1500mA 15A Power Supply 21mm Adapter NEW Free Shipping $7.95 Time Remaining: 5d 39m Buy It Now for only: $7.95 |
 2X Security CCTV Surveillance Camera DC12V 1A 1000mA Power Supply Adapter $5.00 Time Remaining: 9h 30m |
 10 Port Security Camera 12V DC Power Supply Distribution Switch Box+Pigtail A44 $42.95 Time Remaining: 3d 14h 28m Buy It Now for only: $42.95 |
 Mitsubishi FZ 1729A AC Adapter Power Supply Output 9V DC500mA $4.99 Time Remaining: 9h 34m |
 12V 6A Switching Power Supply 8 Outputs for CCTV Camera $20.69 Time Remaining: 8d 21h 53m Buy It Now for only: $20.69 |
 AUDIOVOX CNR 505 AC Adapter Power Supply Output 7v DC 700mA $3.99 Time Remaining: 10h 19m |
 9 Port 12V 75A POWER SUPPLY BOX for CCTV CAMERAS $24.99 Time Remaining: 9h 33m Buy It Now for only: $24.99 |
 12V 5A DC Adapter Power Supply Box 4 CCTV Camera DVR $15.99 Time Remaining: 10h 19m |
 NEW 100FT 30M BNC Video Power Extension Supply Cable F CCTV Security DVR Camera $15.90 Time Remaining: 10d 12h 22m Buy It Now for only: $15.90 |
 12V DC Adapter Power Supply Box 4 CCTV Camera 5 Port $13.99 Time Remaining: 10h 19m |
 DVE Power Supply DSA 0301 05 E Adapter 5V P N 770340 05 $19.50 Time Remaining: 14d 3h 32m Buy It Now for only: $19.50 |
 4 CHANNEL CAMERA 12V DC CCTV SECURITY POWER SUPPLY PIGTAIL SURVEILLANCE 12VDC RT $9.60 Time Remaining: 10h 36m |
 16CH Power Supply Box Auto Reset CCTV Camera pigtail $53.99 Time Remaining: 10d 4h 18m Buy It Now for only: $53.99 |
 2440LED 24VAC 40VA CCTV power supply NEW $0.99 (1 Bid) Time Remaining: 10h 51m |
 2X Security CCTV Surveillance Camera DC12V 1A 1000mA Power Supply Adapter $5.00 Time Remaining: 11h 7m |
 12V AC Adapter Power Supply Box 4 CCTV Camera 5 Port $13.99 Time Remaining: 5h 30m Buy It Now for only: $13.99 |
 2X Security CCTV Surveillance Camera DC12V 1A 1000mA Power Supply Adapter $5.00 Time Remaining: 13h 37m |
 800 MA 120 V AC POWER ADAPTER 3 45 6 75 9 12 VOLT DC 7 PLUG CONVERTER SUPPLY $16.80 Time Remaining: 23d 6h 30m Buy It Now for only: $16.80 |
 4 CHANNEL CAMERA 12V DC CCTV SECURITY POWER SUPPLY PIGTAIL SURVEILLANCE 12VDC RT $9.60 Time Remaining: 14h 1m |
 48 LED illuminator light CCTV IR Infrared Night Vision + Power Supply $11.95 Time Remaining: 16d 13h 50m Buy It Now for only: $11.95 |
 8 CAMERA 12 12V DC CCTV SECURITY POWER SUPPLY PIGTAIL SURVEILLANCE 35A 12VDC RT $9.65 Time Remaining: 17h 1m |
 9CH 10CH Power Supply Distribution Box 12V DC 5A CCTV Security Video Camera A43 $39.95 Time Remaining: 3d 13h 23m Buy It Now for only: $39.95 |
 LiteON 120VAC DC12V Power Adapter Supply Level 3 PB10901L1 $0.99 Time Remaining: 18h 2m |
 12V DC 5A Power Supply Adapter with 10 Port Splitter Cable CCTV Security Camera $22.95 Time Remaining: 26d 7h 19m Buy It Now for only: $22.95 |
 0V 12V Adjustable 0 1200mA AC Power Supply Transformer Adapter DC Adaptor $11.15 (1 Bid) Time Remaining: 19h 16m |
 9CH 8CH Security CCTV Camera Power Supply Distribution Box DC 12V $39.99 Time Remaining: 26d 13h 6m Buy It Now for only: $39.99 |
 DC 12V 15A Power Adapter Switch Supply Charger for Security CCTV Camera $6.99 Time Remaining: 20h 15m |
 48 LED illuminator light CCTV IR Infrared Night Vision + Power Supply $11.90 Time Remaining: 10d 15h 51m Buy It Now for only: $11.90 |
 AC 100 240V to DC 12V 15A Power Adapter Charger Supply for Security CCTV Camera $7.99 Time Remaining: 20h 16m |
 PYRAMID PS52KX 46 52 AMP 12V DC 1000 WATTS POWER SUPPLY $189.99 Time Remaining: 18d 4h 12m Buy It Now for only: $189.99 |
 DC 12V 1A Power Adapter Supply Switch Converter Charger for Security CCTV Camera $0.99 Time Remaining: 20h 16m |
 100 feet Cctv Video Power Cable DVR CCD Security Camera Wire w Power Supply b5m $19.99 Time Remaining: 17d 7h 59m Buy It Now for only: $19.99 |
 LUXON 4 Channel 12 VDC 4 amp UL Security Camera Power Supply DC4UL $45.00 Time Remaining: 20h 39m Buy It Now for only: $55.00 |
 100 240V Converter DC 12V 2A Power Adapter Supply Black $6.44 Time Remaining: 15d 2h 46m Buy It Now for only: $6.44 |
 AC 100 240V to DC 12V 2000mA Power Supply Adaptor Charger $9.99 Time Remaining: 21h 46m |
 12V DC Power Supply 21mm For CCTV Camera 1A in US $4.94 Time Remaining: 16d 22h 14m Buy It Now for only: $4.94 |
 AXIS 216FD NETWORK CAMERA ACCESSORIES 3 DOMES 3 POWER SUPPLIES DC EXTENSIONS $25.00 (1 Bid) Time Remaining: 22h 23m |
 16 CH Power Supply CCTV Camera 18 Port 12V DC+Pigtail $54.86 Time Remaining: 12d 22h 56m Buy It Now for only: $54.86 |
 LUXON 8 Channel 12 VDC 4 amp UL Security Camera Power Supply DC4UL $55.00 Time Remaining: 22h 25m Buy It Now for only: $65.00 |
 Q See H264 8CH DVR with 6 cameras 60ft cables and power supplies $200.00 (1 Bid) Time Remaining: 22h 39m |
 9CH Switch Mode 12V DC Output CCTV Power Supply Box 110V 240V In for CCTV Camera $55.00 Time Remaining: 14d 22h 55m Buy It Now for only: $55.00 |
 4 CHANNEL CAMERA 12V DC CCTV SECURITY POWER SUPPLY PIGTAIL SURVEILLANCE 12VDC RT $9.60 Time Remaining: 22h 56m |
 New US AC100 240V To DC 12V 6A 72W Power Supply Adapter $13.50 Time Remaining: 6d 22h 50m Buy It Now for only: $13.50 |
 AC100 240V to DC 12V 15A 1500mA Power Adapter Power Supply $8.99 Time Remaining: 1d 6m |
 4 CH 12V DC 2000mA CCTV camera Power Supply Adapter $13.50 Time Remaining: 27d 23h 11m Buy It Now for only: $13.50 |
 12v DC Power Supply 2000MA 2A 2 Amps 110V 240V AC input $9.99 Time Remaining: 1d 22m Buy It Now for only: $11.00 |
 12V 2A DC Power Adapter Supply Box For CCTV Camera $6.88 Time Remaining: 28d 10h 23m Buy It Now for only: $6.88 |
 ATLINKS Telephone Power Supply 5 2617 $7.99 Time Remaining: 1d 35m Buy It Now for only: $8.99 |
 Lot of 10 2450 24VAC 50VA CCTV power supply NEW $75.00 Time Remaining: 24d 11h 24m Buy It Now for only: $75.00 |
 12 V DC regulated power supply adapter for cameras 1AR $5.90 Time Remaining: 1d 1h 15m Buy It Now for only: $6.90 |
 Free Shipping Sale 18 CH Port 12V POWER SUPPLY BOX for Cctv Security Camera W38 $76.50 Time Remaining: 4d 6h 35m Buy It Now for only: $76.50 |
 CCTV security cameras12V DC regulated power supply $5.90 Time Remaining: 1d 1h 17m Buy It Now for only: $6.90 |
 DC 12V 5A Power Supply Adapter +4 Split Power Cable for CCTV Security Camera DVR $16.39 Time Remaining: 28d 10h 49m Buy It Now for only: $16.39 |
 CCTV security cameras12 V DC regulated power supply 1AR $5.90 Time Remaining: 1d 1h 17m Buy It Now for only: $6.90 |
 NEW DC 12V 5A Power Supply Adapter 4 Splitter Cable for CCTV Surveillance Camera $16.39 Time Remaining: 19d 10h 32m Buy It Now for only: $16.39 |
 ATT AC AC Adapter Power Supply TP M2 Output 102v AC 780mA $3.99 Time Remaining: 1d 1h 27m |
 4 x Power Supply Box CCTV Camera 9 Port 12V DC+Pigtail $144.99 Time Remaining: 28d 4h 46m Buy It Now for only: $144.99 |
 12v DC Power Supply 2000MA 2A 2 Amps 110V 240V AC input $9.99 Time Remaining: 1d 1h 43m Buy It Now for only: $11.00 |
 DC 12V 2A 2000mA Power Adapter Supply Charger US Plug For LED strip stage light $4.72 Time Remaining: 28d 8h 2m Buy It Now for only: $4.72 |
 12v DC Power Supply 2000MA 2A 2 Amps 110V 240V AC input $9.99 Time Remaining: 1d 1h 43m Buy It Now for only: $11.00 |
 4 CAMERA 12 12V DC CCTV SECURITY POWER SUPPLY PIGTAIL $11.48 Time Remaining: 9d 3h 58m Buy It Now for only: $11.48 |
 12v DC Power Supply 2000MA 2A 2 Amps 110V 240V AC input $9.99 Time Remaining: 1d 1h 43m Buy It Now for only: $11.00 |
Power Supply
All you need to know about switching power supplies
A power supply is a device that supplies energy to electric loads and converts one form of energy to another. Power supplies are capable of converting one form of electrical energy to another. A power supply transfers power from a source like the electrical power grid to a load such as a personal computer, while converting voltage and current characteristics. It is usually employed to provide a regulated output voltage, different from the input voltage. There are many different types of power supplies. Broadly, they can be divided into linear and switching power supplies.
Linear power supplies rely on the use of a mains transformer to obtain direct current voltage from alternating current. Linear power supplies are bulky and heavy and tend to consume energy, thus making efficiency low. Switched mode power supply (switching mode power supply, switch power supply or simply a switcher) is an electronic power supply that works on a different principle. Alternating current is converted to direct current without the use of a mains transformer. The switch in voltage is regulated by an electronic switching circuitry, which helps this form of power supply be a highly efficient converter. This is because the pass transistor switches very quickly between full on and full off states, making it more efficient than a linear power supply, which must dissipate excess voltage to regulate the output.
The input power slicing in switching power supplies occurs at extremely high speeds such as 10 kHz - 1 MHz. The high frequency and high voltages means that smaller transformers and smoothing capacitors can be used. This is different from linear power supplies, which deal with supplies operating at mains frequency, which requires larger transformers and capacitors. This superior efficiency of switch power supplies enables these power supplies to be lighter in weight and smaller in size than linear power supplies. This is crucial to lower shipping costs, and improved distribution.
Switching power supplies include safety features such as current limiting, or a crowbar circuit to help protect the device and user from harm. If there is a high current power draw detected, the switch power supply will assume that it is a direct short circuit and will shut itself down to prevent damage from being done to the device. Switch mode power supplies with protection circuits will shut down if no load has been detected to protect the device.
About the Author
Find out more information about switching power supplies here http://www.meanwelldirect.co.uk/
What kind of power supply would you recommend for a desktop?
Hi everyone, I am building my own custom computer and I was wondering what power supply would fit best. Also this is my first time building a computer.
So far my motherboard and cpu are intel ddr2.
My computer will be a gaming computer so I need to know what kind of power supply would be efficient enough to power it. So do I concentrate on how many watts? If so then how many watts is powerful enough for gaming?
Also are there any other specs I should look at? Thank you.
You need a LOT more information to determine the size of a power supply. For a "gaming" computer, one of the biggest power users is frequently the video card you select. There are cards which can draw several hundred watts by themselves. (there is one that requires a dedicated 420 watt supply!!!)
Add on the wattage of the motherboard, the CPU, the fans, the hard drive, the DVD (particularly if it is a DVD writer), the memory...
Your motherboard manual probably has some baseline specifications in it; start with those. Then look up the information on the video card you have (or are planning to buy).
I run everything from an 80 watt 'pico' sized supply on my firewall to a 250 on my core 2 quad/8GB server to a whopping 750 watts on my dual Opteron running my raid array. My game system has dual 500s.
Sorry, but you need to do your homework on this one...specially with an unknown (at this point) video card.
Have fun!
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