The Sonicake pocket master is a great cheap guitar effects you can buy. But it lacks control
Continue reading “Sonicake pocket master midi control using ESP32 CYD”Category: Audio Processor
TDA7419 Project (Bluetooth + spectrum analyzer + bass mid treble volume control)
Here is a simple circuit that have 7 band spectrum analyzer, bass mid treble and volume controls and input selector. This TDA7419 project is intended for bluetooth speaker project.
Arduino controlled bass mid treble and input selector with tda7419
If you are looking to control your audio with arduino, here’s it is. It uses TDA7419 chip which has a lot of features for controlling your audio. It has 4 input selector, bass control, mid control, treble control, loudness control and a built-in 7 band spectrum analyzer.
Continue reading “Arduino controlled bass mid treble and input selector with tda7419”Simple but effective 2 Band Tone Control Circuit using transistor
Build this simple 2 band tone control Circuit using transistor with complete schematic and layout you can download.
Continue reading “Simple but effective 2 Band Tone Control Circuit using transistor”Audio Limiter Circuit
A good way to protect your speaker from overloading is by using a limiter circuit. This circuit protects your speaker by limiting the input signal to the amplifier by a certain level.
This circuit uses an IC from New Japan Radio Inc. It is NJM2761 which is specially designed for limiting audio signals. It is designed for powered speaker system to protect the speaker from overloading.
Continue reading “Audio Limiter Circuit”3-band Tone Control with Subwoofer signal Output design
Here’s a 3 band tone control with subwoofer output circuit. Take note that the main output are full range. This is not a 2.1 crossover circuit. It is powered with single power supply so you can use a battery or a simple ac/dc power supply.
Continue reading “3-band Tone Control with Subwoofer signal Output design”
Simple 2-way crossover circuit using npn transistor
Here’s a simple circuit you can build for your own low power home audio project. It only uses a NPN transistor rather than the most conventional OPAMP versions. It is simple and easy to build using an universal board. It can be powered by 9v or 12v single power supply.
Continue reading “Simple 2-way crossover circuit using npn transistor”
Super Bass Booster
Here’s a simple circuit you can use to boost more bass from your music. It can be powered by 9V battery or a 12V DC adapter. Take note that this is just basically a 1 band tone control with +- 17dB range at 60Hz bass frequency. You need it to connect before the amplifier input. This can’t be connected directly to speaker. The output of this circuit will be connected to the input of your amplifier and the input of this circuit will be connected to your audio source(i.e. mp3 player).
Audio source selector for arduino
Here’s a simple electronic stereo audio selector switch that can be used for arduino. You can directly connect the pin 1, 16, 3 and 18 to arduino for selecting the source. This pin can accept as low as 2V for logic high according to its datasheet so no need for level shifter.
Mic Preamp With bass treble Tone Control for videoke
If you are looking for a mic preamp with bass and treble control, you may consider this one. I designed it for my future mixer build. I am planning to build one someday when I am not too busy.
ABOUT THE CIRCUIT
The circuit is only on design stage, not yet done any prototype but it is working on my simulation. This is an improved version of the preamp on my audio mixer design I posted.
The rolloff on the 10k-20kHz range is caused by the capacitor C8. This is done to make sure the system will not allow any radio frequency to pass especially AM radio signals. If you want that roll-off to be more aggressive, you can increase it. Treble frequency is set by C3 and C4 while C2 is for setting the bass frequency. Increasing those capacitor values will decrease the frequency. For instance you want the bass to have more boost on the lower end frequency, just increase the value of C2.
Gain is set by R1, if you want more gain, increase R1 value. Potentiometer used are 100k, using 50k or lower will decrease the boost and cut range by around 3dB.
Simulation Results
All range: bass and treble at 0%, 50% and 100%
Bass control (0%-100% at 10% increment)
Treble control (0%-100% at 10% increment)
