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Yes, why not, one Resistor and the LDR should be enough to be connected to an analog pin.

Hello everybody. @ http://gcbasic.sourceforge.net/Typesetter/index.php/Home we have an interesting new Guest Contribution. Nothing done in GCB but why not throw over the fence into other gardens? Maybe this will inspire one or the other to implement a similar project with "our" means? And if not, Li grey's project can still serve as a prime example of successful documentation. At least I think so. Have fun reading! Direct link: http://gcbasic.sourceforge.net/Typesetter/index.php/Guest-Contributi...

No, it is a colpitts oszillator, it it is continous swinging

As I said, I did not look at the original source code, I dislike C++ anyway ;-) Apart from that it's good if you think about it and follow your own ideas, like here for example. It doesn't matter how it is really implemented. Also my idea is, where would you get if you use everything only 1:1 and don't question. Sometimes, at least I hope so, you create a new way that is more efficient, more elegant or simply different from the original solution. So far I have only dealt with metal detectors in a...

It may be that I am wrong, but I read in the description that it is basically a frequency measurement and the oscillator is always running. It simply determines the deviation of the frequency. With this you can even distinguish non-ferrous metals from iron. I did not bother to examine the source code. But for sure you don't work with ringing here, but by changing the quality in the search coil the frequency change is determined. Moreover, the circuit lacks the possibility to program the oscillat...

Metal detectors normally work with two oscillators, which are floatingly adjusted to the same frequency. By approaching metals one oscillator is detuned and this change is made audible by the mixture. In the present circuit only one oscillator is used and the controller measures the frequency. When approaching metals the frequency difference is used to generate a tone. This is quite ingenious. One saves an adjustment before use because the controller measures the frequency immediately after switching...

Metal detectors normally work with two oscillators, which are floatingly adjusted to the same frequency. By approaching metals one oscillator is detuned and this change is made audible by the mixture. In the present circuit only one oscillator is used and the controller measures the frequency. When approaching metals the frequency difference is used to generate a tone. This is quite ingenious. You save an adjustment before use because the controller measures the frequency right after switching on...

Metal detectors normally work with two oscillators, which are floatingly adjusted to the same frequency. By approaching metals one oscillator is detuned and this change is made audible by the mixture. In the present circuit only one oscillator is used and the controller measures the frequency. When approaching metals the frequency difference is used to generate a tone. This is quite ingenious. You save an adjustment before use because the controller measures the frequency right after switching on...