iButton Reader / 1-Wire Probes with Red or Blue LED Light
 
Description

    This iButton probe with LED provides the electrical contact necessary for the transfer of data to and from the DS19xx family of iButtons. The round probe shape provides a self-aligning interface that readily matches the circular rim of the iButton's MicroCan package. The solid metal contacts resist wear and are easy to keep clean.

   The probe has no moving parts, making it a rugged interface for harsh environments. The round center contact of the ibutton probe houses the LED that is rated for maximum 20mA DC at 2.7V typical.

   The probe comes with a brass nut for panel mounting. Since the body of the probe also forms the ground contact, the panel should be of non-conducting material to avoid ground loops. The 30cm cable with connector is provided for easy connection to the system microcontroller.


Key Features

Solid metal read/write panel-mount probe for the iButton family
Integrated green LED for user-feedback signaling
Probe guides the entry of the iButton
iButton slides over the surface to self-clean contacts
Accessible shallow probe cavity simplifies removal of debris such as mud
Probe suited for panels of up to 3mm thickness
Contacts are made from solid 303 stainless steel with a blue nylon insulation
Metric design, prewired for easy installation


Applications

Communications & Telecom
Transportation & Automotive
Security, Avionics and Defense


What is Ibutton?

   An iButton is a microchip similar to those used in a smart card but housed in a round stainless steel button of 17.35mm x 3.1mm - 5.89mm in size (depending on the function). The iButton was invented and is still manufactured exclusively by Dallas Semiconductor mainly for applications in harsh and demanding environments.

   Like a smart card, an iButton does not have an internal power source. It requires connection to a reader (known as a Blue Dot Receptor) in order to be supplied with power and to receive input and send output. Unlike some smart cards, there are currently no contactless iButtons: they require physical contact with a reader to function.

   There are iButtons that measure temperature (for food storage and transport); have an electronic ID (for physical access to buildings); and store e-cash (for purchases both in stores and via the web). For e-commerce applications, the iButton can support JavaCard 2.0/OpenCard standards in addition to proprietary software.

   iButtons have an advantage over conventional smart cards in term of durability and longevity. The stainless steel casing gives iButton a far greater ability to survive in a range of temperatures -- all versions are functional from -40 C to +70 C -- and in a much harsher range of environments (such as exposure to salt water and long term exposure to physical impacts) than the plastic smart card. For e-commerce and personal ID usage, iButtons can be mounted on a range of personal accessories: watch, ring, key chain, or dog tag.

    Among the major successes for the iButton have been its use in Turkey as an e-purse for the mass transit system; in Argentina and Brazil for parking meters; and in the United States as Blue Mailbox attachments that improve postal efficiency.



Contact

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