A special technique is used in this article for designing a metal detector. It only uses a circuit design that is different from the others circuit and needs only one transistor. The circuit picks up signals reflected off metal using a regular radio. What is a Metal Detector: A metal detector is an electrical circuit […]
Simple Beat Frequency Oscillator (BFO) Circuit
Building a special circuit known as a local oscillator or BFO is shown in this article. This kind of circuit is used in many electronics testers and other devices to generate a signal. It makes use of a common circuit component called a bipolar junction transistor (BJT). What is Beat Frequency Oscillator: Applications for the […]
Simple Noise Limiter Circuit
Ever try to listen to the radio but there is a static noise making it hard to hear? This post shows how to build a circuit that can reduce that noise and make the radio signal clearer. This circuit uses transistors like tiny switches to filter out the unwanted noise. WARNING: Building electronics projects can […]
Simple Class A Amplifier Circuit
The class A amplifier circuit type discussed in this post is suitable for tiny speakers or headphones. Amplifiers enhance the volume of sounds. Class A amplifiers use roughly 20 milliamperes of energy making them suitable for devices with lesser power requirements. This article explains how we can construct one by using Q1 and Q2 transistors […]
Bass Treble Tone Control Circuit using a Single Transistor
This circuit is an easy one transistor bass and treble control circuit using a BC547 transistor. It is a simple tone control circuit that allows one to adjust the bass and treble levels in an audio signal. What is Bass Treble Tone Control Circuit: It is an electrical circuit where the maximum treble setting shapes […]
Simple Beeper Circuit
How to build a simple beeper circuit is described in this article. An unbalanced multivibrator is a type of electrical circuit that produces sound when a button is pressed. A little speaker produces the sound. Learning about music and electronics through this project is fun. What is a Beeper Circuit: The Beeper circuit is a […]