Ever try to listen to the radio but there is a static noise making it hard to hear? This post shows you 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 […]
Audio Circuits
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Bass Treble Tone Control Circuit using a Single Transistor
This circuit is a basic one transistor bass and treble control circuit using a BC547 transistor. It is a simple tone control circuit that allows you to adjust, the bass and treble levels in an audio signal. What is Bass Treble Tone Control Circuit: It is an electronic circuit in which the maximum bass setting […]
Simple Beeper Circuit
This post shows you how to build a simple beeper circuit. When you press a button, it makes a sound using a special type of electronic circuit called an asymmetric multivibrator. The sound comes out of a small speaker. This is a fun project to learn about electronics and sound. What is a Beeper Circuit: […]
Simple Adjustable Oscillator Circuit using Two Transistors
This post shows you how to build a mini sound generator circuit with just two transistors! You can adjust the sound to be high pitched like a beep or low pitched like a growl by turning a knob. The circuit can be powered by either four AA batteries or a small wall adapter. This is […]
Simple LM386 Audio Amplifier Circuit
This post shows you how to build a mini amplifier circuit using a common chip called the LM386. It is cheap, easy to make and can make your music player or speakers much louder. This amplifier is perfect for small projects and is not powerful enough for huge concerts, but it is a great way […]
Simple Piezo Buzzer Circuit
This project makes sound in a whole new way. It is surprisingly easy to build and only uses a few parts: The result is a high pitched sound, kind of like a whistle. This circuit is unique because it uses the coil to make the sound keep going unlike most circuits that use resistors and […]