• Homemade Electronic Circuits and Engineering Projects

    The bands are painted with specific colors and each colored band represents a number as revealed in Table 1.1. As an example when the bands are brown, red and orange, then the value of the resistor will be 12 X 1,00.0 or 12,000 ohms; 1,000 ohms is normally identified as a kilohm or k, while 1,000,000 is named a megohm or MOhm.

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  • HOMEMADE METAL DETECTOR ~ Simple & Sensitive(Schematic

    18/01/2015· Looking for a simple but effective metal detector circuit for coins, jewelry, and more? Then this one may be exactly what you're looking for. In this video I will show you exactly how mine was

  • How to Make a Simple Metal Detector YouTube

    02/10/2016· This tutorial will show you how to make a metal detector circuit with a few electronic parts.

  • Homemade Zinc Oxide Rectifier Diode. Spark, Bang, Buzz

    The zinc negative resistance diode on the other hand, is great for making oscillators and transmitters but it does not work especially well as a radio detector. This zinc oxide diode produces the best diode rectifier curve that I have ever obtained thus far from a home cooked device but it can only withstand about 3 volts in the reverse direction.


    02/10/2014· HOW TO DIY ONE OF THE BEST METAL DETECTOR CIRCUITS is a premium Interactive video Tutorial. See bottom of Description for The Gold, Coins And Treasure Ebook. This video is

  • Simple Peak Detector to Detect and Hold Peak Voltage

    15/04/2019· Here, we are going to see simple peak detector circuit that consists of one diode, one capacitor and one resistor. The diode permits the current in one direction, which is to charge the capacitor. When the input drops the capacitor holds the value for a short period which gives some time to measure the peak. Here the short period could be

  • How to Make a Simple DIY VLF IB Metal Detector at Home

    14/05/2018· In this project we show you how to make a simple Induction Balance (IB) Very Low Frequency (VLF) metal detector. We used simple components and materials such as: Buzzer, Copper PC Board, Battery

  • How to make a Rain Detector with alarm Electronics projects

    21/05/2017· In this video we shown How to make a Rain Detector with alarm step by step. This is a Rain detector circuit made of 3V battery, Buzzer, Transistor and c board. 1.

  • Build Your Own Metal Detector with an Arduino Projects

    Build Your Own Metal Detector with an Arduino October 03, 2016 by Evan Kale Building a metal detector using a Colpitts oscillator and an Arduino. Learn how to build a metal detector using a Colpitts oscillator and an Arduino. How Do Metal Detectors Work? The tank circuit . In the above circuit, the series capacitor and inductor form a tank circuit. In a tank circuit, energy is transferred

  • Author: Evan Kale
  • PIR Motion Detector E-801 Free Instruction Manuals

    The motion detector has a number of detection zones, at various vertical and horizontal angles as shown (see diagram A). A moving human body needs to cross/enter one of these zones to activate the sensor. The best all-round coverage is achieved with the unit mounted at the optimum height of 2.5m.

  • Crystal radio Wikipedia

    A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio.It uses only the power of the received radio signal to produce sound, needing no external power. It is named for its most important component, a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode.

  • Very Low Frequency (VLF) Detector Circuit Homemade

    19/03/2019· This is the vlf receiver circuit that I've upgraded and modified it senses ac fields lightening and even receives ship and aircraft radio too. Now this is what the circuit looks like without the upgrades and modifications. I've even used a gravity wave detector circuit added to it and also other experimental circuits

  • Diagram of Metal Detector Project in PDF

    The background information of the history and uses of metal detectors is presented as well as the design criteria for out particular project. The theory behind how a basic PI metal detector works is examined, along with the basic details of a readily available design for a detector.

  • Zinc Negative Resistance RF Amplifier for Crystal Sets.

    20/11/2002· To find out more details, about this homemade zinc negative resistance device, see:Zinc Negative Resistance Oscillator. Two circuit configurations are shown below. The coil is wound on 1 1/2 abs pipe with taps every ten turns. The variable capacitor and detector diode tap points should be chosen for best band coverage and optimal headset volume.

  • Home Made Metal Detector Circuit Wiring Diagrams

    This homemade metal detector circuit will help you find objects composed of materials with relatively high magnetic permeability. It is not suitable for buried coins discovery that is not sensitive enough but you can detect pirates treasures! The metal detector is powered by 2 × 9V batteries, each of it charges with 15mA. L1 detector coil is

  • Ghost Detection Equipment Learn to Build Your Own RF

    Enclose the whole circuit in a suitable sturdy plastic box with the antenna protruding out of the box. Bravo, you are now free to go for a 'ghost hunting' with this 'ghost detector', but wait please don't panic if the LED starts flickering intermittently, It might just be your friend next door making a call on his cell phone! Interesting

  • Metal detector circuit diagrams and projects

    10/11/2009· Metal detector circuit diagrams and projects. Note that all these links are external and we cannot provide support on the circuits or offer any guarantees to their accuracy. Some circuits would be illegal to operate in most countries and others are dangerous to construct and should not be attempted by the inexperienced. If you would like

  • Proximity Detector IC CS209A Pinouts Datasheet Explained

    15/06/2019· Introduction. The device CS209A is a bipolar monolithic IC specifically designed for metal detecting circuit applications. The IC fundamentally has a built-in oscillator stage, a couple of current regulator stages, a low level feed back circuit, and a few other relevant stages like peak detection/demodulation stage, a comparator stage and a couple of complementary output blocks.

  • How to Make a Ghost Detector Circuit Homemade Circuit

    11/05/2019· 010jpg is the top view of the printed circuit board for the swagatam ghost detector circuit. 006 jpg is a close up of another ghost detector i just made notice the home made optocoupler using the fairchild photo transistor and led at each ends of a short length of black heatsink tubing.

  • Metal Detector DIY Circuit electroschematics

    The heart of this diy metal detector circuit is the CS209A IC. The metal detector is built with one 100µH coil that has 40 mm in diameter and is made of 50 turns/0.4 mm wire. CS209A has one oscillator wich forms a LC circuit, the inductance of the coil will change when it is near metal objects.

  • How to Build a Voltage Sensor Circuit

    How to Build a Voltage Sensor Circuit. In this circuit, we will show how to build a voltage sensor circuit. A voltage sensor circuit is a circuit that can sense the voltage input into it. If the voltage reaches a certain threshold, then an indicator, such as an LED, will turn on.

  • How to Make Your Own Detector Lapidary World

    How to Make Your Own Detector YOU CAN build a quality metal detector on your own home workbench, It’s fun and depending upon your junk box and parts hunting ability, you can save as much as a hundred dollars over the cost of an equivalent commercial in-strument. The workbench referred to can be a kitchen table, a plank

  • metal detector circuit Metal Detector Metal detector

    Arduino Projects Electronics Projects Electronics Gadgets Circuit Projects Metal Detektor Ground Penetrating Radar Walk Through Metal Detector Waterproof Metal Detector Garrett Metal Detectors PTI makes the most sensitive walk through metal detector

  • Homemade Metal Detector Circuit Schematic Tech Wise Ideas

    homemade metal detector circuit schematic Tech Wise from diy metal detector,source:pinterest. simple bfo metal detector on the scoop [project] time for science basic circuitry of metal detection basic circuitry of metal detection how to build a pulse induction metal detector from a diy kit which basic circuitry of metal detection gold detector circuit diagram beautiful build your own

  • Making homemade detectors {diodes} The RadioBoard Forums

    29/10/2011· I heated a penny sized piece of zinc in a stainless steel spoon held in locking pliers with a propane torch. In less than a minute of heating it melted and I poured it out on a scrap of sheetmetal. Bottom line- the best homemade detector so far. Hard to find the sweet spot but as sensitive as average galena. The heated sheetmetal zincite worked

  • Metal Detector Circuit Diagram Project Lovely Homemade

    Metal Detector Circuit Diagram Project Lovely Homemade Metal from diy metal detector,source:dreamdiving-resort. simple bfo metal detector on the scoop [project] time for science basic circuitry of metal detection basic circuitry of metal detection how to build a pulse induction metal detector from a diy kit which basic circuitry of metal detection gold detector circuit diagram beautiful

  • Free Electronic Circuit Collection of 45,000 + electronic

    has 45,000+ electronic circuits, cross-referenced into 500+ categories. We have searched the web to help you find quick design ideas. We make every effort to link to original material posted by the designer. Please let us if you would like us to link to or post your design.

  • About Us Circuits At Home

    About Us. I’ve been fascinated with electricity for as long as I can remember. I grew up in an old home in a rural setting, so the quality and continuity of our electrical service was spotty at best.

  • Simple Metal Detector Circuit with Applications

    A Metal Detector Circuit using IC 555. A simple metal detector circuit diagram project is designed using IC 555, as you can see in the 555 timer circuits, these circuits detect the metals and magnets. When a magnet is near to the 10mH choke, the o/p frequency changes.This circuit can be powered from a power supply, which can provide an o/p DC

  • RF Spy Bug Detector Circuit electroschematics

    Hi Sir excellent work! I want to do something similar. But I want to power up a RF detector circuit with 12V,detect signals of about 433Mhz(400mhz-500mhz) and give a sound during detection. Sensitivity to about 12m. Could you assist me please, a schematic maybe. I would really appreciate it thank you!