metal detector - Circuitos electrónicos

This is the circuit diagram of rain detector alarm. When the sensor is wetted with the water, then the alarm will be activated.This circuit can be used for other purposes. A 555 astable multivibrator is used here which gives a tone of about 1kHz upon detecting water. The sensor when wetted by water completes the circuit and makes the 555 oscillate at about 1kHz. The sensor i.......

https://skema-elektronik.blogspot.com/2015/03/rain-detector-alarm.html

only metal detector circuit diagrams. Search DIY electronic projects and circuit diagrams with descriptions. Learn electronics.

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Diagram High LASER Power Supply

https://circuitndiagram.blogspot.com/2013/05/diagram-high-laser-power-supply.html

Here is simple circuit of a simple emergency light that can be constructed without much pain

https://circuitsector.blogspot.com/2010/05/20w-low-cost-emergency-light.html

Simple ON OFF Touch Switch with 555 Schematic

https://circuitsstream.blogspot.com/2013/05/simple-on-off-touch-switch-with-555.html

http://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/161kHz_Metal_Detector.gif

http://www.techlib.com/electronics/audioamps.html

https://easycircuit012.blogspot.com.es/search/label/Detectors?&max-results=5

A precision capacitance meter that measures one picofarad with one percent error.

http://www.nov47.com/cap/cap1.htm

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https://andonsale.blogspot.com/2013/07/deals-intended-for-extech-382200-single.html

This unit is an updated version of the Wide Dynamic Range Field Strength Meter. While the basic function is the same, it has several critical differences: It uses a specialized integrated circuit, the Analog Devices AD8307. This chip is designed specifically as a logarithmic amplifier for use through 500 MHz. Using the AD8307, it has a wider dynamic range (85 dB versus 55 dB) and it has built-in temperature compensation. Because of the different nature of this type of detector - and the fac.......

http://www.electronics-diy.com/field-strength-meter-wide-dynamic-range.php

This simple circuit can be used to activate whatever you like, for example, by connecting it to microcontroller, relays, secret alarms, robot applications or just turn on LED1 which lights up as long as you touch the metal plate. The circuit consists of voltage divider R1 and R2, one Schmitt trigger/inverter gate from a 40106 IC, a small capacitor to keep strong RF at bay and LED1 with current limiting resistor R3. The metal plate is connected via a wire to R1. R1 and R2 together form a voltage .......

http://www.circuit-finder.com/categories/sensor/touch-sensor/742/simple-one-wire-touch-detector

https://electgpl.blogspot.com.ar/search/label/Sensor Inductivo

http://bbs.dapj.com/2004/10/datasheets-and-application-answer.html

https://embeddedprojectideas.blogspot.com/2009/03/engineering-projects-vi.html