Editing 1-Wire (section)

== Usage example ==
1-Wire devices are available in different packages: [[integrated circuit]]s, a [[TO-92]]-style package (as typically used for transistors), and a portable form called an {{not a typo|iButton}} or Dallas key which is a small stainless-steel package that resembles a [[Button cell|watch battery]]. Manufacturers also produce devices more complex than a single component that use the 1-Wire bus to communicate.

1-Wire devices can fit in different places in a system. It might be one of many components on a circuit board within a product. It also might be a single component within a device such as a temperature probe. It could be attached to a device being monitored. Some laboratory systems connect to 1-Wire devices using cables with [[modular connector]]s or [[Category 5 cable|CAT-5]] cable. In such systems, [[Registered jack#RJ11|RJ11]] (6P2C or 6P4C [[modular connector|modular plugs]], commonly used for telephones) are popular.

Systems of sensors and actuators can be built by wiring together many 1-Wire components. Each 1-Wire component contains all of the logic needed to operate on the 1-Wire bus. Examples include [[temperature]] loggers, timers, [[voltage]] and current sensors, battery monitors, and [[memory]]. These can be connected to a PC using a bus converter. [[USB]], [[RS-232]] serial, and [[parallel port]] interfaces are popular solutions for connecting a MicroLan to the host PC. 1-Wire devices can also be interfaced directly to microcontrollers from various vendors.

{{not a typo|iButtons}} are connected to 1-Wire bus systems by means of sockets with contacts that touch the "lid" and "base" of the canister. Alternatively, the connection can be semi-permanent with a socket into which the {{not a typo|iButton}} clips, but from which it is easily removed.

<!--The '''Java Ring''' is a ring-mounted {{not a typo|iButton}} with a [[Java virtual machine]] that is compatible with the [[Java Card]] 2.0 specification. These were given to attendees of the 1998 [[JavaOne]] conference.<ref name="JavaWorld">''[http://www.javaworld.com/javaworld/jw-04-1998/jw-04-javadev.html?page=1 An introduction to the Java Ring]'', by [[Stephen M. Curry]], [[JavaWorld.com]], April 1st, 1998.</ref>-->
<!--I feel that this was only kinda relevant to the article, and them being handed out at a Java conference was likely not so-->
Each 1-Wire chip has a unique identifier code. This feature makes the chips, especially {{not a typo|iButtons}}, suitable electronic keys. Some uses include locks, burglar alarms, computer systems, manufacturer-approved accessories, time clocks and courier and maintenance keys for smart safes. {{not a typo|iButtons}} have been used as [[Akbil (smart ticket)|Akbil smart ticket]]s for the [[public transport in Istanbul]].

=== Power supplies ===
Apple [[MagSafe]]- and MagSafe-2-connector–equipped power supplies, displays, and Mac laptops use the 1-Wire protocol to send and receive data to and from the connected Mac laptop, via the middle pin of the connector. Data include power supply model, wattage, and serial number; and laptop commands to send full power, and illuminate the red or green [[light-emitting diode]]s in the connector.<ref>{{Cite web | url=http://www.righto.com/2013/06/teardown-and-exploration-of-magsafe.html | title="Teardown and exploration of Apple's Magsafe connector" | publisher=rightTo.com | access-date=2017-07-18}}</ref>

Genuine [[Dell]] laptop power supplies use the 1-Wire protocol to send data via the third wire to the [[laptop|laptop computer]] about power, current and voltage ratings. The laptop will then refuse charging if the adapter does not meet requirements.<ref>{{Cite web | url=http://hackaday.com/2014/03/03/hacking-dell-laptop-charger-identification/ | title=Hacking Dell Laptop Charger Identification | publisher=hackaday.com | access-date=2015-11-30}}</ref>