Tag: audio control circuits

Circuits controlling the audio signal tone control, bass, treble filter circuits, vu meter display and similar audio electronics circuits

PT2314 Arduino Spectrum Analyzer LCD , Encoder, Remote Control

| 2022/11/17

The PT2314 is a sound processor with a 4-channel stereo input selector, adjustable gain, volume control, frequency loudness compensation and tone control. I implemented the Arduino nano PT2314 project, it works pretty well. 2X20 LCD (LCD2004) is used for the display. 2 buttons are used for input selection mute, standby mode. Menu transitions and other…

PT2322 PT2323 Arduino 5.1 Digital Audio Control Circuit

| 2022/10/27

5.1 Control board project for sound system. Remote control, LCD, Encoder. I have almost no application with Arduino, I always tried to use Arduino alternatives and somehow found circuit solutions. But audio applications always intrigue me. I applied the digital volume control Arduino project made with Arduino Nano PT2323 and PT2322 audio control ICs, the…

Amplifier control ATmega328p STM32F103, STM32F303, ATmega32

| 2022/10/07

STM32F103, STM32F303, ATmega32, ATmega328p Amplifier control project is a control module for your audio amplifier. It supports various I²C/SPI controlled sound processors and FM tuners. All source codes and PCB drawings have been shared. It also has an LCD spectrum analyzer. TDAXXXX is a great source for PTXXXX digital audio control ICs. Library, code files…

Stereo Tone Control Circuit with Opamp

| 2022/09/24

Built on stereo tone control circuit TL072, LM358 Opams PCB dimensions are small 56x68mm. The supply voltage of the tone control circuit is unipolar. A virtual ground is created with the LM358 opamp. The voltage is connected according to the follower circuit. Using the voltage divider R3R4, half the supply voltage is applied to the…

Subwoofer Filter Circuit 50..200Hz

| 2022/09/24

The subwoofer filter, or low-pass filter, is designed to suppress high frequencies that shouldn’t be fed into the audio amplifier’s input and then into the low-frequency head (woofer, subwoofer). The subwoofer filter has a cutoff frequency. A signal input to the filter with a frequency greater than the cutoff frequency will be attenuated. These signals…

TL072 Active Filter Circuit For Subwoofer Amp

| 2020/07/03

The important thing for the subwoofer amplifier is the Bass filter circuit. Circuit TL072 Opamp is built on operational amplifier. The system’s task is to collect signals from both channels and then separate low frequencies. There is a lower level filter, regulation of filter cutoff frequency in the range of 50Hz-150Hz, smooth phase shift and…

TL072 Active subwoofer filter 80 Hz-250 Hz

| 2020/04/02

Active subwoofer filter circuit based on TL072 Opamp is designed for use with Power amplifier with good parameters (narrow frequency response). The transition band of the filter is between about 10Hz (bottom) and 80Hz. + -12v symmetrical Zenerli regulated circuit Max. input voltage + – 38VDC There are PCB and diagram drawings, material list prepared…

MCP602 Sound card adapter

| 2019/12/08

Sound card adapter Multiple devices can be connected to the audio signal output of a computer sound card at the same time: a tower, a TV set, a speaker set, etc. Each of these devices loads the output to some extent and it may happen that the signal attenuation is too strong. This circuit is…

2.1 Preamp Bass Filter Circuit 4558 Opamp

| 2019/12/08

For the 2.1 amplifier project, I prepared a 4558 opamp preamplifier subwoofer filter circuit. The circuit is based on 2 4558 opamps, with the main audio input and bass output volume adjustment. Power supply symmetrical + -15VDC The PCB drawing was not very regular because I had to prepare it very urgently, but I ran…

Class D Bass Guitar Amplifier Circuit

| 2019/08/08

Completed class d amplifier project Class d power amp, preamp, vu meter, psu, panel desing. Learn about design of amplifiers in class D. Design amplifier wiring for bass with a power output of about 100 W. Complete the output stage with an active correction preamp with with a three-band equalizer and a switchable center band…