Collect non-complex metal detector on the chip K155LA3
When I rested on the sea in Feodosiya, I noticed how one tourist was collected using the gold not tricky, but industrial metal detector. All saw it and he attracted the attention, and this prevented the work. I also wanted to try to look, but thought it would be easier to do something of their own, so to do, make no thought what you are looking for gold in the waters of the Black sea. The long search for a suitable scheme to succeed. I built myself a special device and buckled him in the leg, the coil was mounted in the feet. In the end, I completed instead of the headphone output of the vibrator from your phone as a signaling device. Go along the bottom and not bothering anyone, and as you start to rattle at the ankle and actively start there to dive with a small scoop:)) will Tell you so, your success is guaranteed:)) Now talk about a simple circuit that I modified. It is simple and you will be able to collect on Saturday. It will be important for the results not to collect it, and efficiently to set. You will need to configure in the water:)) Surprised It is! Otherwise something is not working properly and not! On the chip K155LA3 collected two conventional LC oscillator, the schema modules DD1.1-DD1.4. The detector is assembled by the voltage doubling circuit, used to plot a scheme on VDI, VD2 . As you have seen here use high impedance headphones, so the sound to listen to. I put in a load key and it loaded the vibrator from phone Nokia 3101. It needs to be remote to be attached with Velcro to the leg. The experiment showed that the detector captures an engagement ring at a depth of five cm, not deeper. This is considering the fact that he tied to his leg and coil in Lasta. If changes the key or key work, it is clearly under foot. Very often dive for corks from beer times of the 80, they rusted, but their sea. First generator parts on the chip DD1.1 and DD1.2 starts on the frequency of the circuit L1CI that its load is. He is set to about 465 kHz. The second generator blocks on the chip DD1.3. DD1.4 is associated with the antenna coil and it determines its frequency. Coil do so. On a log with a diameter of 200 mm are doing the groove, insert the cut tubing and wound 30 turns of wire PEL of 0.4 that before the capacitor C2, it adjusts the sensitivity of the device.
by the Way, for detector on your phone, you can use any germanium diodes. In the overall experiment, as you get something good, write a review! I too will be interested to see your solution for this here hunting for metal.
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