Category Archives: Educational and Fun Projects for Kids

Ideas for hands-on educational projects for kids, parents, teachers, home-schoolers …

Simplest Seismometer – Experiments with direct recording through PC sound card

In this post I am not talking about the chopped audio method used in all my previous devices. This one is just straight audio – directly into the PC’s sound card. Some time ago I had bought into the idea … Continue reading

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Simple AM and Short Wave Radio Projects for Beginners

AM radio with spiral-wound coil and home-made tuning capacitor The radios described here are a regenerative design utilizing a single JFET and cheap audio amplifier integrated circuit. (JFET: “Junction Field Effect Transistor”, a small electronic device which can amplify radio … Continue reading

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BFO Metal Detector – Student Project

(* BFO: “Beat Frequency Oscillator” a technical term describing the most common operating method used by metal detectors.) Here are the technical details of the metal detector our students made during the winter vacation. Continue reading at Kids’ Resource Center……

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Home Made Speaker Experiment

Here is an easy way to demonstrate how sound is reproduced electronically. This is how a speaker works:

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Student Seismology Research Station – Seismometer and Magnetometer Recording Via Computer Sound Card

(Seismology = the study of earthquakes Seismometer = device for measuring earthquakes Magnetometer = device for measuring magnetic fields) One cannot ordinarily record earthquakes via a computer sound card as they don’t respond much to the slow vibrations experienced in … Continue reading

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Simple Magnetometer Science Project Using Water as Lens

(Click on photos to see full size image.) Theory A magnetometer such as this can detect small changes in the Earth’s magnetic field. It can be useful to monitor these changes as they may indicate the occurrence of natural phenomena … Continue reading

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Simple magnetometer for detecting earthquake precursors

(Electronic gadget for predicting earthquakes)   magnetometer: n. [Magneto- + -meter] An instrument for measuring the intensity of magnetic forces [1913 Webster] precursor:  One who, or that which, precedes an event, and indicates its approach; a forerunner [1913 Webster] Scientists, … Continue reading

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Recording Earthquakes for Beginners

One of many earthquakes I’ve recorded. This one was a 4.2 around 90 Km away. Background In my search for educational projects that can engage a kid’s interest, I recently began looking into seismology (from Ancient Greek, “seismos”, an earthquake … Continue reading

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Wooden Crane

This project is similar to the 4WD car, not only in that the student is working with wood and electrics, but also that the concept of drive ratios is involved. The crane takes this a little further: one can observe … Continue reading

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Home made battery checker

Technically, this is called a “galvanometer.”I didn’t want to put that word at the top of the post in case it scared people away. A galvanometer is a device for measuring the flow of an electric current. (From Galvani, a … Continue reading

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