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چه گیری دادی ها
بابا اصلا این از لورنز هم قویتر
هرکی دلش می خواد می سازه دیگه
اینم ورزن جدید همین مدار
Intro:
This is an Improvement on my Pi Detector. Features Either a Single Coil Metal Detector, or 2 possible Dual Coil Configurations! You choose which. Same Features as my Pulse-1 but with additional controls forvarying most of the parameters. The price to build this device will rise to about 40$. As you can see bellow, the detector was constructed by me, step by step in two days.
Performance:
This metal detector was not specifically designed to Detect Gold Nuggets but these added controls may help.
Quotes:
The circuit now detects a 1 ounce gold eagle at 21 inches and is very solid. Barely detect is more like 25 inches so I am impressed. With some tweaking I am sure this can be improved.
# A 1/2 Gram
Gold Nugget. NOT DETECTABLE
# It detects a Canadian Quarter at 4 Inches.
# My one ounce Pure
Gold bar at 6 Inches.
# Large Mans
Gold Ring at 5 1/2 Inches.
# Side of a Car (Steel Body) at 23 Inches.
# Side of a Truck (Aluminum Body) at 12 Inches.
# Canadian Copper Penny at 3 1/2 Inches.
# 12 Inch Square Copper Plate at 14 Inches
# Can at 23"
# Bar of pure gold (99.9%) with dimensions of 1.15" * 2.00" * .05" it detects it at 6 inches. After making another flat wound coil with 35 turns of #21 AWG wire, 1" ID. and 4" OD., it detects the gold bar at about 11 inches on flat and 9 1/2 inches.