Audio Circuits
Audio Circuits
6 LED VU meter using a single transistor (circuit)
This simple 6 LED VU meter circuit allows us to visualize the level of an audio signal. Due to its few components, it is a cheap circuit and easy to build.
Metronome circuit with adjustable BPM
This metronome circuit with adjustable BPM, allows those persons who study or are music fans, to keep the timing, quite accurately for a long period of time.
400-Watt Stereo Amplifier Circuit with STK4050
This 400 watts stereo amplifier circuit uses the Sanyo STK4050 hybrid IC, a high quality low noise amplifier. Its maximum output power is 200W per channel
Audio Splitter Circuit Diagram – 1 Input – 4 Outputs
This circuit has a single input and 4 independent outputs, each amplified with an operational amplifier.
How to add a tweeter to a baffle or speaker
How to add a tweeter to a baffle or speaker. Very simple circuit, using only one potentiometer and two capacitors, very easy to install.
Guitar Synthesizer using CD4046
Guitar Synthesizer using CD4046. To achieve the objective, the CMOS PLL CD4046 integrated circuit is used, producing an unusual sound from a guitar which sounds very similar to a synthesizer.
4-channel audio mixer using LM3900 IC
4-channel audio mixer using LM3900 IC
4 operational amplifiers, some resistors and capacitors to implement an audio mixer with a very simple design.
Microphone Mixer using operational amplifiers
Microphone Mixer using operational amplifiers
This Microphone Mixer combines signals from 3 different sources (3 microphones) easily and economically.
6 Watts Audio Amplifier Circuit with TDA2613 (Hi-Fi)
6 Watts Audio Amplifier Circuit with TDA2613 (Hi-Fi)
High fidelity 6 watts audio amplifier circuit with the TDA2613 Integrated Circuit, very easy to implement due to its very few external components
Audio Level Indicator Circuit Diagram using LM339
Audio level indicator circuit using LM339
This audio level indicator is very interesting because it allows us to visualize the audio level intensity by connecting this circuit to the input of a loudspeaker.
Tone generator using two 555 timers
Tone generator using two 555 timers
This circuit uses the well-known 555 integrated circuit to generate a range of sounds that are heard through a small loudspeaker.
8 LED VU meter circuit using LM324 IC
8 LED VU meter made of IC-LM324.
This circuit can be used to display the variation of an audio signal in a group of 8 LEDs, behaving like a VU meter. We could use an specific integrated circuit used for VU meters, but we decided to use a readily available integrated circuit: The LM324 op amp.
2 watts Audio Amplifier Circuit with the TDA2822M IC
TDA2822M 2 watt audio amplifier circuit
This 2 watt audio amplifier circuit is specially designed to consume little power and to be used with batteries or low voltage power sources.
Music Box Circuit using a CD4017 and two 555
Music box circuit using a CD4017 decade counter and two 555 timers.
This circuit attempts to emulate the operation of a music box. The maximum number of notes is 10, allowing us to make a simple melody.