Hi Gary,chemelec said:Here is a good, simple Proximity detector I designed on my webste.
Nice circuit. :lol:
Aren't you up in the mountains where there isn't hundreds of radio and TV stations for your circuit to fool around with?
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Hi Gary,chemelec said:Here is a good, simple Proximity detector I designed on my webste.
epilot said:Nigel Goodwin said:epilot said:Nigel how it collects the power?
i would like to know more about its performance without any internal power supply
Basically an RF tuned circuit feeding a rectifier - which is why it's short range.
so it sends a electromagnetic signal for feeding the RFID circuit?
The RFID (radio-frequency identification) system consists of an RFID tag, a reader, and a user-interface computer. The passive RFID tag contains a silicon chip and an LC antenna circuit. The passive tag is energized by an RF field that’s transmitted by the reader (interrogation). Therefore, the tag doesn’t require any batteries for its operation.
Passive RFID tags are used for animal tagging, asset tracking, access control applications, etc. When the tag is energized by the RF field, it transmits back the contents of its memory by modulating the incoming RF field. The reader detects and demodulates the signal and identifies the tag.
Nigel Goodwin said:How about RFID tags?, no power required on the animal side.
audioguru said:Hi Gary,chemelec said:Here is a good, simple Proximity detector I designed on my webste.
Nice circuit. :lol:
Aren't you up in the mountains where there isn't hundreds of radio and TV stations for your circuit to fool around with?