The ability to be able to read a 125Khz access card or keyfob at a large distance involves numerous factors including reader antenna size, radiated power, receiver sensitivity and the like. The reader cloner shown on the previous web page has the benefit of simplicity and low cost but is only capable of reading an RFID tag from a distance of appro
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ximately 3-4 inches. The ability to read a tag from much greater distances requires much more complicated receiver circuitry and the ability to generate a higher power RF magnetic field. Rather than designing a long range reader from scratch, my long range cloner project leverages the use of a commercial off-the-shelf long-range reader that I have modified to be able to write a T5567 Read/Write card with the information that is output by the commercial reader. The reader that I selected for my project is the 5375AGN00 MaxiProx reader that is manufactured by HID. The reader has a typical read range of up to 24 inches for a standard ProxCard II access card. The reader outputs the card information via a standard Wiegand interface following each read of a valid tag. The wiegand data stream is then sent to a custom circuit board that I have physically installed into unused space within the MaxiProx reader. The custom circuit board utilizes a Parallax SX28 8-bit microcontroller to decode, display and store the data that is sent by the reader. Commercial readers do not output all of the binary information that is transmitted by the tag. Information such as the card number, the facility code and parity bits are transmitted by the reader whereas the front end preamble and detailed card format information are verified by the reader but not output as part of the wiegand data stream. However, this missing information can be captured...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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