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RFID Circuits, Page 2
RFID Circuits: #'s - N
M - Z
Last Updated on:
Friday, June 04, 2021 01:53 PM |
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Designed by Dave Johnson, P.E.: |
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- OPTICAL
RFID TEST CIRCUIT
I designed this test the concept of using light techniques to send identification
data instead of RF. A more detailed discussion on this scheme can be found in the
Imagineered new products section.
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Wireless RFID Smart Key Detector
Many cars now use a key with an imbedded RFID microchip. The microchip is read
when the key is inserted into the car’s ignition. The keys containing a
microchip often look the same as most other keys. People duplicating car keys will
often not know of the microchip. This circuit will light a LED if it detects a
key containing a 125KHz RFID chip.
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Links to electronic circuits, electronic schematics and designs for engineers,
hobbyists, students & inventors:
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Medium Power 125kHz Oscillator - This circuit is similar to CMOS
INVERTERS FORM 125KHZ OSCILLATOR but adds more inverters in parallel to deliver
yet more power. The values shown are for 125KHz.... [Designed by David A.
Johnson] |
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Medium Power 125kHz Oscillator-2 - This circuit is similar to MEDIUM
POWER 125KHZ OSCILLATOR but adds even more inverters in parallel to deliver yet
more power. The values shown are for 125KHz.... [Designed by David A.
Johnson] |
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Optical RFID Test Circuit - I designed this test the concept of using
light techniques to send identification data instead of RF. A more detailed
discussion on this scheme can be found in the Imagineered new products section.
…. [Designed by David A. Johnson] |
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Passive RFID Basics - Microchip Application Note Published 13-Apr-99
(app note added 2/06) |
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RFID Coil Design - Microchip Application Note Published 29-Sep-98
(app note added 2/06) |
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RFID Demokit 125kHz - Transceiver including antenna for reading and writing,
where possible, the 125kHz transponders EM4100, EM4102, EM4105, EM4150. Includes 2 tags
each using the EM4150 and EM4100 and demonstration software. (added 3/05) |
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RFID Smart Key Detector - Many cars now use a key with an imbedded RFID
microchip. The microchip is read when the key is inserted into the car’s ignition.
The keys containing a microchip often look the same as most other keys. People duplicating
car keys will often not know of the microchip. This circuit will light a LED if it detects
a key containing a 125KHz RFID chip. …. [Hobby Corner Circuit by Dave Johnson] |
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RFID Tag & COB Development Guide with Microchip's RFID Devices - Microchip
Application Note Published 21-Nov-02 (app note added 2/06) |
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Transponder coils in an RFID system - Coilcraft Power Magnetics Application Note
(app note added 6/06) |
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Wideband RF ICs for Power Detection & Control - DN335 Design Notes (Linear
Technology) (app note added 1/06) |
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Wireless RFID Smart Key Detector - Many cars now use a key with an imbedded
RFID microchip. The microchip is read when the key is inserted into the car’s
ignition. The keys containing a microchip often look the same as most other keys.
People duplicating car keys will often not know of the microchip. This circuit will light
a LED if it detects a key containing a 125KHz RFID chip. …. [Hobby Corner Circuit by Dave
Johnson] |
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RFID Circuits: #'s - N
M - Z |
