High-Impedance Input Hi-Fi Tone Control
Tone control circuit is an electronic circuit which is designed to manipulate the tone of audio signal. Tone of audio signal is analog to color in light. We.....
VOX (Voice-Operated Switch)
This schematic diagram below show a circuit of VOX Box (voice-operated switch). This circuit consist of a Schmitt trigger, a relay driver, and microphone.....
basic circuit makes rgb color organ
The idea of a color organ is that any sound, including musical sound, can be transformed into light. As stated by wave theory, both music and light have.....
Mic Pre-Amp with Clipping
Signal clipping is usually avoided in most application, but we can find some useful examples where clipping is intentionally employed in audio processing. One.....
Audio Signal Strength Detector/Converter
Below is the schematic diagram of an audio input module. We can produce a DC output voltage that is proportional to the input signal amplitude (the signal.....
Magnetic Phono Preamp Has Ultra Low Noise Figure
This circuit is a ultra low noise magnetic phono preamp. This circuit uses an LM381/1A. This circuit also includes RIAA equalization. This circuit has ultra.....
Turbo Bass (Booster)
This is a Turbo Bass circuit. Using this circuit, the low frequency sound signals(bass) can be multiplied. This circuit is an active circuit. The first op-amp.....
Single Chip Two-Tones Siren
Kids like the police or fire-brigade cars siren sound. This circuit can generate dual tone like Police or Fire-brigade cars siren sound. This circuit usually.....
Audio Signal Clipping Indicator
A window comparator formed by two op-amps packaged into IC1 is the heart of the circuit below. With this technique, we can detect precisely and symmetrically.....
Dual-Tone (Frequency) Decoder (Detector)
The output of this circuit will be activated when a mix of two tone/frequency is detected on the input. The frequency f is determined by the values of R1 and.....
Microphone or Electric Guitar Pre-Amplifier with Noise Gate and Compression
In personal electronics and computer audio system, the SSM2167 is a complete and flexible solution for conditioning microphone inputs. It is also very good for....
Electronic Drum Synthesizer
The circuit below consists of two twin-T oscillators set to a point below oscillation. To set the circuit into oscillation, we can touch the Touch Pad. Here ...
Dynamic Microphone Pre-Amplifier
Dynamic microphone uses a moving coil around magnetic field to convert mechanical movement into electrical signal. The ordinary mini speaker is turned into a.....
Ambulance (Hee-Haw) Siren
The circuit below consists of two multivibrators. The first multivibrator provides the speed of the change from `hee` to `haw` and operates at a low frequency.....
Voltage-Controlled Tone/Volume/Balance Circuit
The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit which can be applied in car radio, TV and audio systems. Loudness compensation to.....
Single Supply Summing Amplifier for Audio Mixer
The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used. To increase dynamic range,.....
Single Supply Summing Amplifier for Audio Mixer
The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used. To increase dynamic range,.....
True Subwoofer Circuit
This is true subwoofer circuit. This circuit is used for 15- to 18-inch woofers and will not work with 8- or 6- inch subwoofers. It has bass-reflex, a.....
True Subwoofer Circuit
This is true subwoofer circuit. This circuit is used for 15- to 18-inch woofers and will not work with 8- or 6- inch subwoofers. It has bass-reflex, a.....
Magnetic-Pickup Phono Preamplifier
This is a simple circuit of magnetic pickup phono preamplifier. A proper loading to a reluctance is provided by this circuit. Here is the circuit: The gain.....