Magnetic connector with optical signal path

[0001] Mobile computing devices have become very popular the past several years. Users have chosen these devices not only for their portability, they have chosen them to be replacements for their traditional computers as well. These mobile devices thus fill two niches, as on-the-go computing and as desktop replacements. As a desktop replacement, there are two needs that these portable computers must satisfy.

[0002] The first of these needs is the ability to function the length of a workday. Unfortunately, this exceeds current battery capacity; thus the laptop needs to be plugged in to a power source for at least a portion of the day. The second need to be satisfied is the ability to transfer data over a physical connection.

[0003] Presently, satisfying these two needs requires at least two connections to the mobile device; one for power and one for data transmission. But including two (or more) connectors increases cost and consumes space, typically along the side of the mobile device. It also requires the user to make two separate connections, thus limiting the usefulness and desirability of the mobile computing format.

[0004] These two connections also require the use of two cables. This in turn clutters a user's workspace, further degrading the mobile computing experience. Another way that a user's experience can quickly become unpleasant is when the user trips or otherwise becomes entangled with one of these cables, thereby pulling the laptop to the ground.

[0005] Thus, what is needed are circuits, apparatus, and methods that provide a power and data transfer system that can supply both power and data to a laptop or other mobile computing device using a single connection. To reduce the clutter caused by multiple cables, it is further desirable to have a power and data adapter that can provide power and data to the mobile computing device using a single cable. It is also desirable to have a connector system that can connect this single cable to the mobile computing device. To avoid the consequence of laptops being pulled to the ground when a cable is tripped over, it is desirable that the connector system easily disengages when the cable is pulled away from the mobile computing device.

[0006] Accordingly, embodiments of the present invention provide circuits, apparatus, and methods for power and data transfer systems that can supply both power and data to mobile computing or other types of devices using a single connection. Further embodiments of the present invention also provide power and data adapters that can provide data and power to mobile computing or other types of devices using a single cable. Further embodiments of the present invention provide connector systems for connecting fiber-optic and power cables to mobile computing or other types of devices. Further embodiments of the present invention provide connector systems with connector inserts that easily disengage from connector receptacles.

[0007] An exemplary embodiment of the present invention provides a connector system that provides both power and data. In various embodiments of the present invention, data is provided using fiber-optic connections. These connections may include one, two, four, or other numbers of fiber-optic cables. In a specific embodiment of the present invention, four fiber-optic cables are used, where two cables are used for data transmission and two are used for data reception. In this specific embodiment of the present invention, the four fiber-optic cables are arranged such that the connection between a connector insert and a connector receptacle can be made in two ways along one axis of symmetry. That is, the connector insert can be inserted into the connector receptacle either right side up, or upside down, and the data connection is made using the four fiber-optic cables. This exemplary embodiment of the present invention also employs two, four, or more contacts for power transmission. A specific embodiment of the present invention provides four such contacts, two for a power supply voltage and two for ground connections. This allows relatively high currents to be provided to the mobile device, enabling rapid battery recharging.

[0008] Another exemplary embodiment of the present invention provides a connector system that employs one or more magnets to engage a connector insert with a connector receptacle. These one or more magnets are attracted to an attraction plate in the connector receptacle, where the attraction plate is formed using a magnet or a ferromagnetic material. In a specific embodiment of the present invention, the connector insert includes four magnets arranged with alternating polarities. Magnetic field lines originating in a first magnet in the connector insert travel through an attractor plate in the receptacle and terminate in a second magnet in the insert, where the first and second magnets have opposite polarities.

[0009] Another exemplary embodiment of the present invention provides a power and data adapter capable of providing power and data over a single cable to a mobile computing or other type of device. In various embodiments of the present invention, this power and data adapter may receive power from a wall, car, or other type outlet. The power and data adapter may directly connect to the outlet, or it may connect to the outlet via a power cord or cable. A specific embodiment of the present invention plugs directly into a wall outlet. In this case, the power and data adapter may also include circuitry for converting AC power to DC power suitable for being provided to the mobile computing or other type of device.

[0010] The power and data adapter may translate data between the mobile computing or other type of device and one or more other devices. These one or more other devices may communicate using one or more protocols. The power and data adapter may thus translate or convert data using these one or more protocols to optical data to be provided to the mobile computing or other type of device. The power and data adapter may also translate or convert optical data from the computing or other type of device to data consistent with one or more of these protocols to be provided to one or more other devices. The data may be provided by the power and data adapter to the connector system and received by the power and data adapter from the connector system using one or more fiber-optic cables. The power and data adapter may provide and receive data to and from other devices using fiber-optic cables, or other types of wired or wireless connections such as Local Area Networking (LAN), Universal Serial Bus (USB), Digital Visual Interface (DVI), DisplayPort, IEEE 802.11 a, b, g, or other types of connections.

[0011] Other devices may communicate with each other through the power and data adapter. For example, two or more USB devices may communicate with each other via a corresponding number of USB connectors on the power and data adapter. The power and data adapter may also include circuitry for translating among these wired and wireless protocols and one or more protocols suitable for fiber-optic communications. The power and data adapter may communicate with the mobile computing or other type of device over a single cable that includes conductors for the DC power and one or more fiber-optic cables.

[0012] Another exemplary embodiment of the present invention prevents power from being applied at a connector insert until the connector insert is placed in a connector receptacle. In one embodiment of the present invention, the power and data adapter provides a small amount of current between power and ground pins of the connector insert. A resulting voltage is then sense. If the voltage is in a predetermined range, power is applied to the insert's power pins. In another embodiment of the present invention, an identification or other signal is provided by the connector insert. If a proper response is received, power is applied to the insert's power pins. Further embodiments may require that such an identification signal be periodically provided. When the identification is not received for a period of time, power is removed from the connector insert.

[0013] Various embodiments of the present invention may incorporate one or more of these and the other features described herein. A better understanding of the nature and advantages of the present invention may be gained by reference to the following detailed description and the accompanying drawings.

[0029] FIG. 1 illustrates a power and data transfer system according to an embodiment of the present invention. This figure includes a power and data adapter 110 and a connector system including a connector receptacle 132 and a connector insert 120 coupled to the power and data adapter 110 via cable 124. This figure, as with the other included figures, is shown for illustrative purposes only and does not limit either the possible embodiments of the present invention or the claims.

[0030] The power and data adapter 110 receives a first power supply voltage and provides either the first power supply voltage or a second power supply voltage to the connector insert 120 via the fiber-optic and DC power cable 124. In this specific example, the power and data adapter 110 receives power at power terminals 112. The power terminals 112 may be arranged to receive AC power from a conventional wall socket or other appropriate source. In other embodiments of the present invention, the power and data adapter 110 may receive power from a car outlet or other source.

[0031] The power and data adapter 110 may receive and provide data using one or more data connections. In this specific example, the data connections include a USB 114, Ethernet or RJ 45 115, DVI connector 116, and optical connection 118. The optical connection can be an optical connection such as a Sony/Philips Digital Interconnect Format (S/PDIF), optical Ethernet, Fiber Optic Service (FIOS), 100 or 1000 baseFL, or other fiber optic connection. Data received at the data connections is converted to optical data by the power and data adapter 110 and provided to the connector insert 120 via the fiber-optic and DC power cable 124. Data received at the connector insert 120 is received by the power and data adapter 110, again via the fiber-optic and DC power cable 124. The power and data adapter 110 can then convert this data and provide it on the appropriate connector.

[0032] The power and data adapter 110 provides DC power and fiber-optic data to the connector insert 120 using the fiber-optic and DC power cable 124. In various embodiments of the present invention, the fiber-optic and DC power cable 124 may be connected to the power and data adapter 110 using a connector system such as the connector insert 120 and connector receptacle 132. In other embodiments of the present invention, the fiber-optic and DC power cable 124 can be hardwired to the power and data adapter 110.

[0033] The connector system includes the connector insert 120 and the connector receptacle 132. The connector insert 120 further includes a connector insert or housing 122, which may be held by a user when the connector insert 120 is inserted into the connector receptacle 132. In this specific example, the connector receptacle 132 is located in a laptop 130, though in other embodiments of the present invention, the connector receptacle 132 may be located in other types of mobile or other electronic devices. For example, the connector receptacle 132 may be located in a portable media player, display, cell phone, desktop computer, or other mobile or non-mobile computing or other type of device.

[0034] In various embodiments of the present invention, the power and data adapter 110 is capable of determining one or more characteristics of a computer, such as the laptop 130 that it is connected to. These characteristics can be determined by the power and data adapter sensing a voltage at the connector receptacle 132, by reading data stored on the computer, by receiving data from the computer, or in other ways. The characteristics can be power supply requirements, the type of data or format needed by the computer, or other characteristics. After determining these characteristics, the power and data adapter 110 then configures itself to provide the required power and data.

[0035] In various embodiments of the present invention, a laptop 130 or other computer is capable of determining one or more characteristics of a power and data adapter, such as the power and data adapter 110. These characteristics can be determined by the laptop sensing a voltage at the connector insert 120, by reading data stored on the power and data adapter 110, by receiving data from the power and data adapter 110, or in other ways. The characteristics can be power supply capabilities, the type of data or format that can be provided by the power and data adapter 110, or other characteristics. After determining these characteristics, the computer can configure itself to make use of the available power and data.

[0036] FIG. 2 illustrates circuitry for a power and data adapter, such as the power and data adapter 110 in FIG. 1 or other power and data adapters consistent with embodiments of the present invention. In this example, a transformer and rectifier 210 receive power from power connection 220. In this example, the power connection 220 may be power prongs configured to be inserted into a conventional wall socket or outlet. The AC power received at the power connection 220 is converted by the transformer and rectifier 210 and provided to a DC power supply circuit 215, which generates regulated DC power supplies that can be provided to a connector insert and to the remaining power and data adapter circuitry.

[0037] This example further includes a number of data ports, including USB data ports 230 and 232, local area network port 240, DVI port 250, and optical port 255. In various embodiments of the present invention, fewer, more, and other types of data ports may be included. These ports may be wired electronic data ports, fiber-optic data ports, wireless data ports, or other types of data ports. Data may be received and transmitted at one or more of these ports. Data received at these ports may be translated by translation circuitry 270 into fiber-optic data and provided by the fiber-optic interface 260 to the connector insert. Similarly, data received from the connector insert by the fiber-optic interface 260 can be translated by the translation circuitry 270 and provided to the appropriate data port. In various embodiments of the present invention, one or more of these data ports may communicate with each other. For example, USB data ports 230 and 232 may communicate with each other via hub 234. In this way, the power and data adapter 110 acts as a USB hub, where data can be transferred from one USB port to another or from one USB port to a connector insert via fiber-optic interface 260 and translation circuitry 270.

[0038] In various embodiments of the present invention, it is desirable if the power and data adapter does not need to be plugged directly into a wall outlet or other power supply source. In such an example, the power and data adapter may have its own power cable. This allows the power and data adapter to be remotely located from its power source. An example is shown in the following figure.

[0039] FIG. 3 illustrates another power and data transfer system according to an embodiment of the present invention. This example includes a power and data adapter 310 and a connector system including a connector insert 320 and connector receptacle 332, where the connector insert 320 and power and data adapter 310 are coupled via DC power and fiber-optic cable 324.

[0040] In this example, a power cable 350 powers the power and data adapter 310. The power cable 350 includes a power connection 352, which may include prongs adapted to be inserted into a wall socket. A power transformer 354 may convert AC power received at the power connection 352 to DC power for use by the power and data adapter 310. The DC power provided by the power transformer 354 may also be provided to the connector insert 320, though in other embodiments of the present invention, a DC-to-DC converter is used to provide a second DC voltage to the connector insert 320.

[0041] In other embodiments of the present invention, it is desirable that the DC power be provided to a connector insert separately from the fiber-optic data. An example is shown in the following figure.

[0042] FIG. 4 illustrates another power and data transfer system according to an embodiment of the present invention. This example includes a data adapter 410 and a connector system including a connector insert 420 and connector receptacle 432, where the connector insert 420 and data adapter 410 are coupled together over a fiber-optic cable 424. A separate DC power cable 450 provides DC power to the connector insert 420. The DC power cable 450 has a power connection 450, which may include prongs adapted to fit into a wall outlet. Also included is a power transformer 454, which converts AC power received at the power connection 452 to DC power, which can be provided to the connector insert 420.

[0043] Connector systems according to embodiments of the present invention include a connector insert and a connector receptacle that are capable of transferring a power supply, for example, a power supply including a supply voltage and a ground, and a fiber-optic data signal. Various embodiments of the present invention are arranged such that the connector insert is magnetically held in contact with the connector receptacle. These embodiments of the present invention provide a connector insert that is easily disengaged from its receptacle when a cable connected to the connector insert is pulled. Raised guides and corresponding recesses on the insert and receptacle can be used to align the connector insert to the connector receptacle. Examples are shown in the following figures.

[0044] FIGS. 5A-5D illustrate front views of a connector insert 510 and a connector receptacle 560 according to an embodiment of the present invention. While this connector insert 510 and connector receptacle 560 are well suited for use with a power and data adapter according to an embodiment of the present invention, they may be used in other situations not including such a power and data adapter. In FIG. 5A, a single fiber-optic line 530 is used to transfer optical data from the connector insert 510 to the connector receptacle 560. In this example, the connector insert 510 includes a number of pins 520 on each side of the fiber-optic line 530. In other embodiments, pins 520 and one or more fiber-optic lines 530 may have various configurations. In this example, four pins 520 are shown. Two of these pins may be used to provide a positive power supply, while two pins may be used for ground. In other embodiments of the present invention, other power supplies may be provided. The pins 520 and fiber-optic line 530 are located in a recess 535, which is surrounded by a raised guide 550. An insert housing 540 may be employed to protect the raised guide 550.

[0045] The connector insert 510 inserts into the connector receptacle 560. The connector receptacle 560 includes a corresponding number of contacts 570 and a fiber-optic line 580. The contacts 570 and fiber-optic line 580 may be on a raised guide 595. A recess 590 may surround the raised guide 595. The recess may be located in a housing 585, which may be a separate entity or may be a portion of a device such as a laptop computer.

[0046] When the connector insert 510 is mated with the connector receptacle 560, the raised guide 550 fits into the recess 590. Similarly, the raised guide 595 fits into the recess 535. This arrangement provides alignment between the connector insert 510 and connector receptacle 560. Also, the connector insert 510 is easily disengaged when a cable connected to the connector insert 510 pulled away from the connector receptacle 560.

[0047] In various embodiments of the present invention, the connector insert 510 and connector receptacle 560 are magnetically attracted to each other. This may be accomplished by placing one or more magnets in either the connector insert 510 or connector receptacle 560. In various embodiments of the present invention, one or more magnets are located in the connector insert 510. In a specific embodiment of the present invention, four magnets are placed in the connector insert. Specifically, the raised guide 550 comprises four magnets. These magnets may be generally located in each corner of the connector insert 510. These magnets further may have alternating polarities. In this specific embodiment of the present invention, the connector receptacle 560 includes an attractor plate. Specifically, an attractor plate is located behind recess 590. This attractor plate may be made using a magnet or ferromagnetic material. In this way, field lines originating in one magnet in the connector insert 510 travel through the attraction plate in the connector receptacle 560 to a second magnet having an opposite polarity in the connector insert 510. This increases the magnetic attraction between the connector insert 510 and connector receptacle 560. Further details, for example details pertaining to these magnets, attractor plates, and alignment and disengagement features can be found in U.S. Pat. No. 7,311,526, which is incorporated by reference.

[0048] In this example, the connector insert 510 may be inserted into the connector receptacle 560 either right side up or upside down relative to horizontal line “A.” Also in this example, only one fiber-optic line is used. In various embodiments of the present invention, data communication is only one way. In such a situation, no more than one fiber-optic line is needed. In other embodiments of the present invention, bidirectional or full-duplex communication is desired. In these situations, either one fiber-optic line may be multiplexed between transmit and receive channels, or other fiber-optic lines may be included. An example is shown in the following figure.

[0049] FIG. 5B illustrates front views of a connector insert and connector receptacle according to an embodiment of the present invention. The connector insert 510 in this example includes two fiber-optic lines 530. In this example, one fiber-optic line is used for transmitting and a second is used for receiving. This allows full-duplex communication without having to multiplex signals. Unfortunately, in this configuration, the connector insert 510 can only be placed in the connector receptacle 560 in the right side up orientation. If the connector insert 510 is inserted into the connector receptacle 560 in an upside down position, the fiber-optic transmit channel of the connector insert 510 will be in communication with the transmit channel of the connector receptacle 560. Accordingly, in a specific embodiment of the present invention, the TX and RX fiber optic lines 530 or 560 can be multiplexed, that is, they can be reversed if an upside down insertion is detected. The multiplexing can take place in either the connector insert 510 or the connector receptacle 560. This multiplexing may be performed optically or electrically. To enable upside down insertions and full-duplex communication without the need to multiplex transmit and receive lines, an embodiment of the present invention employs four fiber-optic cables. An example is shown in the following figure.

[0050] FIG. 5C illustrates front views of a connector insert and a connector receptacle according to an embodiment of the present invention. The connector insert 510 in this example includes four fiber-optic lines 530. In this example, two lines are used for transmitting and two are used for receiving. The two transmitting and two receiving fiber-optic lines may each be implemented as one split fiber-optic cable. That is, each may be implemented as one fiber-optic cable whose end is split. This allows full-duplex communication without having to multiplex transmit and receive signals. Since the four fiber-optic lines are rotationally symmetrical, the connector insert 510 may be inserted into the connector receptacle 560 in either the right-side up or upside down positions.

[0051] FIG. 5D illustrates front views of a connector insert and a connector receptacle according to another embodiment of the present invention. The connector insert 510 in this example includes four fiber-optic lines 530. As before, two lines are used for transmitting and two are used for receiving. An additional pin, which may be a signal or a power pin, is placed in the center of the four fiber optic lines. This allows backward compatibility with currently available connectors and receptacles that are discussed in U.S. Pat. No. 7,311,526, which is incorporated by reference. Again, since the four fiber-optic lines are rotationally symmetrical the connector insert 510 may be inserted into the connector receptacle 560 in either the right-side up or upside down positions. The additional pin show may be included in the other examples above, and in other connector systems according to embodiments of the present invention.

[0052] FIGS. 6A-6C illustrate transmit and receive circuitry employed by connector systems according to embodiments of the present invention. In FIG. 6A, only one fiber-optic cable is used, such as in the example shown in FIG. 5A. In this case, data provided by transmitter 610 and received by receiver 620 is multiplexed over a fiber-optic multiplexer 630. That is, when transmitter 610 transmits data, transmitter 610 provides data to the fiber-optic multiplexer 630, which provides it over the fiber-optic line. Data received over the fiber-optic line is multiplexed by the fiber-optic multiplexer 630 and provided to the receiver 620. In FIG. 6B, two fiber-optic cables are used, such as in the example of FIG. 5B. In this case, the transmitter 610 and receiver 620 each have their own fiber-optic cable, so no multiplexing is required. In FIG. 6C, the transmitter 610 and receiver 620 each have two fiber-optic cables. Accordingly, a fiber-optic cable from the transmitter 610 is split. Similarly, the fiber-optic cable to the receiver 620 is split.

[0053] FIG. 7 illustrates a top view of a connector insert 710 and connector receptacle 760 according to an embodiment of the present invention. Connector insert 710 includes a number of pins 720 and a fiber-optic line 730. A raised guide 750 surrounds the pins 720 and fiber-optic line 730. When the connector insert 710 is mated with the connector receptacle 760, the raised guide 750 is arranged to fit into the recess 790 in the connector receptacle 760. Similarly, the raised guide 795 on the connector receptacle 760 fits in the recess 735 of the connector insert 710. The pins 720 are arranged to contact the contacts 770 and make electrical connections. In order to ensure proper contact, the pins 720 may be biased, for example by a spring. The fiber-optic line 730 comes in close proximity with the fiber-optic line 780 in the connector receptacle 760 in order to form a fiber-optic connection. In this example, the fiber-optic connection reliability is enhanced by the use of lenses 732 and 782. In other embodiments of the present invention, lenses are not used, rather the close proximity of the fiber-optic lines is relied upon.

[0054] In various embodiments of the present invention, a fiber-optic line in the connector insert transfers data with a fiber-optic line in the connector receptacle. Successful transfers of data rely on the fiber-optic lines being in close proximity. This transfer can be aided by the use of a lens as shown above.

[0055] Again, to improve reliability, lenses may be used to focus light provided and received by the fiber-optic lines. In other embodiments of the present invention, other devices such as collectors may be used. These collectors may be rounded, flat, or other shaped mirrors or reflectors to gather light provided by a fiber-optic line. Examples of these techniques are shown in the following figures.

[0056] FIGS. 8 and 9 illustrate side views of a connector insert and connector receptacle according to an embodiment of the present invention. In FIG. 8, lenses 832 and 882 are used to improve the fiber-optic signal between fiber-optic lines 830 and 880. These lenses focus light emitted and received by their corresponding fiber-optic line for improved reception In FIG. 9, collectors 936 and 986 are used to gather light received by their corresponding fiber-optic line to improve the signal reliability between fiber-optic lines 930 and 980.

[0057] In the above examples, only one fiber-optic line is shown for simplicity. In other embodiments of the present invention, two, three, four, or more fiber-optic lines may be used. Also in the above examples, the connector insert and connector receptacle each have five locations, where four locations are electrical connections and one location is for an optical data connection. Another embodiment of the present invention, other arrangements are possible. In some of these arrangements, two pins are used for power, while two are used for ground. Various arrangements that may be employed by an embodiment of the present invention are shown in the following figure.

[0058] FIG. 10 illustrates electrical pin and fiber-optical line positions of a connector insert according to embodiment of the present invention. In some of these examples, two pins are used for power, while two are used for ground. Often, the central location is used for optical data. This allows a connector insert to be inserted in one of two ways along a central line of symmetry, as discussed above. In other examples, two of the five locations may be used for optical data lines. In still other embodiments of the present invention, either more or fewer than five locations may be used.

[0059] It can be undesirable for connector insert pins to be supplied with power when the connector insert is not inserted into a connector receptacle. In such a case, inadvertent currents may flow between pins of the connector insert when the connector insert comes in contact with a conductor of some sort, such as a paper clip. Having power applied to the connector insert when the connector insert is not located in the connector receptacle is particularly undesirable when there are magnets located in the connector insert, since these magnets may attract conductive materials. Accordingly, embodiments of the present invention determine whether a connector insert is inserted into a connector receptacle before applying power to the connector insert. Examples of this are shown in the following figures.

[0060] FIG. 11 illustrates a power and data transfer system according to an embodiment of the present invention. The power and data adapter 1110 in this example does not apply power to a connector insert until the connector insert is seated in a connector receptacle. In this example, a power connection is made to a wall outlet or sockets using power terminals 1112. The power and data adapter 1110 determines that connector insert 1120 is not seated in the connector receptacle 1132. Accordingly, the power and data adapter 1110 does not provide power to the connector insert 1120. At some point, the connector insert 1120 is inserted into the connector receptacle 1132. Afterwards, the power and data adapter 1110 determines that the connector insert 1120 is located in the connector receptacle 1132. The power and data adapter 1110 then applies power to the connector insert 1120.

[0061] FIG. 12 illustrates another power and data transfer system according to an embodiment of the present invention. The power and data adapter 1210 in this system does not apply power to a connector insert until it is seated in a connector receptacle. In this example, the connector insert 1220 is inserted into the connector receptacle 1232. After this, a power connection for the power and data adapter 1210 is made to a wall socket, for example, using power terminals 1212. The power and data adapter 1210 determines that the connector insert 1220 is inserted into the connector receptacle 1232. Accordingly, the power and data adapter 1210 applies power to the connector insert 1220. A flowchart outlining this is shown in the following figure.

[0062] FIG. 13 illustrates a method of applying power to a connector according to an embodiment of the present invention. In act 1310, power is received from a wall socket. In act 1320, it is determined whether a connector insert has been inserted into a connector receptacle. If it is not, power is not applied to the connector insert in act 1330. If the power and data adapter determines that the connector insert has been inserted into a connector receptacle, power is applied to the connector insert in act 1340. In act 1350, it is determined whether the connector insert has been removed. If it has not been removed, power continues to be applied to the connector insert in act 1340. If the connector insert has been removed, then power is not applied to the connector insert in act 1330.

[0063] In various embodiments of the present invention, a determination that the connector insert has been inserted into a connector receptacle may be made by providing a sense current between the power and ground pins of the connector insert. If a voltage in a specific range is measured, power can then be applied to the connector insert. Optionally at this time, the device attached to the connector receptacle can receive, provide, or trade identification information with a power and data adapter. Example circuitry that may be employed by a power and data adapter to accomplish this is shown in the following figure.

[0064] FIG. 14 illustrates circuitry in a power and data adapter according to an embodiment of the present invention. The power and data adapter 1410 includes a power connection 1412, that may be, for example, prongs that are arranged to be inserted into a wall outlet. The prongs may rotate between two positions: a first position extended from the power and data adapter such that they may be inserted into a wall outlet, and a second position where they are not extended to save space. The power and data adapter 1410 further includes a transformer and rectifier circuit 1420 to convert the AC power received to the power connection to DC power that is provided to the power switch 1430. The power switch 1430 determines whether power should be applied to the power lines 1432 in the DC power and data cable 1440. Initially, the low current output and voltage sense circuit 1450 provides a small current between power and ground pins of a connector insert (not shown.) If a resulting voltage in the proper range is detected, power switch 1430 applies power between the power line 1442 and ground line 1444. Following that, device identification can be received, provided, or traded over the optical data lines 1446 using the device identification interface circuitry 1460.

[0065] FIGS. 15 and 16 illustrate the operation of the circuitry in FIG. 14. In act 1510, power is received at a power connection from a wall socket or other source. A low current is provided at an insert in act 1520. For example, a low current may be provided between the power and ground pins of a connector insert. In act 1530, a resulting voltage is measure, and it is determined whether the resulting voltage is in a specific range. If it is not in the specific range, then power is not switched to the connector insert in act 1540. If a correct voltage is sensed, full power may be switched to the connector insert in act 1550.

[0066] In act 1620, identification data may be sent by the power and data adapter. In act 1630, it is determined whether proper identification data is returned. If it is not, power is removed from the connector insert in act 1640. At this point, a low current is again provided in act 1520. If a proper identification is received in act 1630, then power is maintained in the connector insert in act 1650. This identification data can be checked periodically in act 1660. If the data is received, power is maintained in act 1650. Once the data is no longer periodically received, the power is removed from the connector insert in act 1640, and again a low current is provided in act 1520.

[0067] The above description of exemplary embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form described, and many modifications and variations are possible in light of the teaching above. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications to thereby enable others skilled in the art to best utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated.