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Serial Adapter

June 9th, 2011

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regular power adapter is not necessarily true

Interpretation of basic knowledge Notebook - power adapter on the power supply, power supply, power supply and load matching or discussion, there are a few common questions are as follows:

1, the power adapter (hereinafter referred to as power) of the nominal voltage and current mean?

2, are of the same nominal power supply voltage, output current different, the same can not be used in the books?

3, the same machine, Managing someone else's power, I'm always very hot, and why?

4, power supply nominal voltage than my laptop battery voltage is much higher, will not trouble you?

5, why the power theory, first wife first wife is usually the power is better than non-?

First, the nominal voltage of the power adapter is usually open circuit output voltage, which is not connected to any load, no current output voltage value. Therefore, that this is the power supply output voltage limit. For the power regulator unit for use within the active component in the voltage reference or, in general the use of high resistance of the DC voltage meter can be directly measured nominal voltage (electromotive force should be used more accurate method of bridge, belonging to the University Physics course experiment, not repeat them here), even if the mains voltage fluctuations in a certain place, the output is steadily constant value; but for a small inexpensive transformer market, such as a music player like the kind used is basically the traditional magnetic core transformer rectifier diode bridge rectifier with four plus a large filter capacitors to get away, so if you use common DC voltage meter measured value will be greater than the nominal voltage, because the output of bridge rectifier pulsating DC, simply, it is a sinusoidal voltage signal of a positive half cycle of time connected chain, filtered through a large capacitor will become a flat number, but still large ripple factor (the ripple coefficient is the same voltage signal fluctuation The ratio of the average voltage, the smaller the closer that the DC voltage), the so-called nominal voltage refers to the time integral of this voltage divided by the integration time, the simple understanding is that the average value of time, if common DC voltmeter measured value is very close to the maximum value of the voltage signal, so the uncertainty. Also, if the electricity fluctuates, the output of such power will also change.
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USB to RS232 DB9 Male Adapter 9 pin Serial Cable  Driver CD Windows 7 8 10
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Vintage IBM PCjr Adapter Cable for Serial Devices New Sealed
Vintage IBM PCjr Adapter Cable for Serial Devices New Sealed
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Equinox Avocent 8 Port Serial PCI Adapter 910254 002 A SST 4 8P
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USB 20 TO SERIAL RS232 DB9 9 PIN ADAPTER CABLE PDA cord GPS CONVERTER
USB 20 TO SERIAL RS232 DB9 9 PIN ADAPTER CABLE PDA cord GPS CONVERTER
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5PCS 4 Pin IDE Molex to 2 Serial ATA SATA Hard Drive Power Adapter Cable wire
5PCS 4 Pin IDE Molex to 2 Serial ATA SATA Hard Drive Power Adapter Cable wire
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Lot of 6 9 Pin DB9 Male to 25 Pin DB25 Male Serial Adapter Converter Connector
Lot of 6 9 Pin DB9 Male to 25 Pin DB25 Male Serial Adapter Converter Connector
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Fahion RS232 Serial to USB 20 PL2303 Cable Adapter Converter for Win 7 8 10PX
Fahion RS232 Serial to USB 20 PL2303 Cable Adapter Converter for Win 7 8 10PX
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USB RS 232 Serial Adapter DB 9 Male works with all Windows and Mac
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SABRENT MODEL SBT USC6K 6FT USB 20 SERIAL CABLE ADAPTER
SABRENT MODEL SBT USC6K 6FT USB 20 SERIAL CABLE ADAPTER
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JJ P01012 Siig CyberSerial IO1829 1 Port DB 9 PCI High Profile Serial Adapter
JJ P01012 Siig CyberSerial IO1829 1 Port DB 9 PCI High Profile Serial Adapter
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USB 20 to RS232 COM Port 9 Pin Serial DB9 Adapter Cable Converter
USB 20 to RS232 COM Port 9 Pin Serial DB9 Adapter Cable Converter
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373035 B21 HP KVM Serial Interface Adapter 520 373 001 375203 001
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SIIG JJ P04621 Dual Profile Quartet Serial 550 PCI Serial Adapter P007 63 CARD
SIIG JJ P04621 Dual Profile Quartet Serial 550 PCI Serial Adapter P007 63 CARD
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RadioShack 9 Pin RS 232 DB9 M to M Serial Cable Gender Coupler Adapter 260 0231
RadioShack 9 Pin RS 232 DB9 M to M Serial Cable Gender Coupler Adapter 260 0231
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9 Pin RS 232 DB9 Male to Male M M Serial Cable Gender Changer Coupler Adapter
9 Pin RS 232 DB9 Male to Male M M Serial Cable Gender Changer Coupler Adapter
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USB 20 to DB9  DB25 RS232 COM Port Serial Convert Adapter Cable Cord
USB 20 to DB9 DB25 RS232 COM Port Serial Convert Adapter Cable Cord
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Lead Free Qty 15 4 pin Molex PC Power Connector to 2x SATA HDD Adapter Y Cable
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NEW HP COMPAQ 160 0072 SERIAL PARALLEL ADAPTER  DB9 Male to DB25 Female 437
NEW HP COMPAQ 160 0072 SERIAL PARALLEL ADAPTER DB9 Male to DB25 Female 437
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15m USB to RS232 Serial 9Pin DB9 Female Converter Adapter Cable XP Win7 8 YF
15m USB to RS232 Serial 9Pin DB9 Female Converter Adapter Cable XP Win7 8 YF
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Concepts PDA USB Serial Adapter cable New in Package unopened Item 60446
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Tripp Lite Keyspan High Speed USB to Serial Adapter
Tripp Lite Keyspan High Speed USB to Serial Adapter
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StarTech PCI1S950DV 1 Port PCI RS232 Serial Adapter Card w 16950 UART 33 5V
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2PK StarTech DB9 RS232 Serial Gender Changer GC9SM Slimline Adapter Male to Male
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USB to RS232 Serial Port DB9 9 Pin Male COM Port Converter Adapter Cable PDA BE
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2X 4 Pin IDE Molex to 15 Pin Serial ATA SATA Hard Drive Power Adapter Cable Tn
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HP Compaq DX2450 Desktop PCI 2S1P Serial Parallel Adapter 321722 001
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USB to RS485 RS422 DB9 Serial Converter Adapter Cable Support Remote Wake
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RS232 Serial to USB20 PL2303 Cable Adapter Converter for Win 7 8 10 Highquality
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25M Black Programming Cable PLC Adapter Serial Port 9 Pin Female Dsub
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USB to RS 232 RS232 DB9 Male Adapter 9 pin Serial Cable for Windows 7 8 10 No CD
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New TRIPP LITE USB TO SERIAL ADAPTER U209 000 R
New TRIPP LITE USB TO SERIAL ADAPTER U209 000 R
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Perle UltraPort USB to Serial 9 pin Adapter w software 98 2000 XP Vista 7 8 10
Perle UltraPort USB to Serial 9 pin Adapter w software 98 2000 XP Vista 7 8 10
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