졸업작품 의뢰는 ▶LINK 로 방문해주세요
http://www.talkingelectronics.com/projects/200TrCcts/MetalDetectors/MetalDetectors-1.html
Remember this: almost all circuits (up to about 4 - 6 transistors) have the same capability
: detecting a 20mm coin at about 100mm.
기억해라. 이걸 : 대부분의 모든 회로들은 갖고있다. the 같은 용량을
: 감지하며 a 20mm 코인을 at about 100mm에서.
It doesn't matter if the circuit is simple or complex,
The sensitivity revolves around the circuit driving the coil.
Some circuits are more sensitive to "interference" and we have demonstrated this in Circuits 1 - 8 at the end of the page.
이건 문제가 아니다. 만약 the 회로가 간단하면 or 복잡하며,
이 민감도는 연관된다. around the 회로에
The most-sensitive circuit is a 100mm dia coil with just 12 to 20 turns and operates at about 200kHz as shown in circuit 8.
The frequency of the circuit will change by one Hertz and this can be detected on an AM radio. You cannot get better than this.
