cara pasang mp3 bluetooth pada amplifier

Summary

This tutorial demonstrates how to connect an MP3 Bluetooth module to an active speaker or amplifier setup, using the main PSU for power supply to reduce noise. It includes step-by-step instructions on using a 7812 regulator IC and a 220 Ohm resistor to stabilize the power input, as well as a method to eliminate buzzing and humming noises by adding a 2200µF capacitor. The video also compares different MP3 Bluetooth modules, highlighting the impact of component quality on sound clarity. The tutorial concludes with a demonstration of the improved audio output.

Takeaways

• 😀 The tutorial demonstrates how to integrate an MP3 Bluetooth module with an active speaker or amplifier circuit.
• 😀 The MP3 Bluetooth module gets its power supply from the main PSU to avoid additional power transformers.
• 😀 An IC regulator (7812) is used along with a 220 Ohm resistor to stabilize the voltage and prevent the regulator from overheating.
• 😀 The 220 Ohm resistor is connected to the input leg of the IC regulator to help manage current flow.
• 😀 A connection is made between the IC regulator's input and the positive output of the main PSU to ensure proper voltage distribution.
• 😀 The negative output of the PSU is connected to the ground of the IC regulator to complete the circuit.
• 😀 The output voltage from the regulator is checked to be 12V, which is suitable for powering the MP3 Bluetooth module.
• 😀 It’s essential to properly connect the MP3 Bluetooth module’s power input cables to the regulator, ensuring correct polarity.
• 😀 The speaker connections are tested, and audio distortion or humming sounds are addressed by adding a 200μF capacitor to eliminate noise.
• 😀 The capacitor (Elco) is added to the regulator’s input and ground to stabilize the MP3 module's power supply and reduce unwanted noise.
• 😀 When using a separate power supply, the noise issues are less noticeable, and the sound remains clean without needing a capacitor.

Q & A

What is the purpose of connecting the MP3 Bluetooth module to an active speaker or amplifier?

The purpose is to supply power to the MP3 Bluetooth module from the main PSU of the speaker or amplifier. This approach minimizes the need for an additional transformer, saving on space and simplifying the setup.

Why is a 7812 IC regulator used in the setup?

The 7812 IC regulator is used to step down the voltage to a stable 12V, which is required for the MP3 Bluetooth module. It ensures that the module receives the correct voltage to function properly without overheating.

What role does the 220 Ohm resistor play in the circuit?

The 220 Ohm resistor is used to limit the voltage and current entering the 7812 IC regulator. It helps prevent the regulator from overheating and ensures it operates efficiently and lasts longer.

What is the function of the Elco 2200uF capacitor in this setup?

The Elco 2200uF capacitor is added to reduce noise, specifically to eliminate the humming or 'nging' sound that may occur when the MP3 Bluetooth module shares the PSU with other components. It helps stabilize the power supply and filter out unwanted noise.

What is the difference in performance when the MP3 module shares the PSU with the amplifier compared to using a separate transformer?

When the MP3 module shares the PSU with the amplifier, there can be noise, such as humming or 'nging'. Using a separate transformer for the MP3 module ensures a clean and noise-free audio output, as the power supply is isolated.

Why does the speaker emit a loud humming or 'nging' sound when the MP3 Bluetooth module shares the PSU?

The humming or 'nging' sound occurs because the MP3 Bluetooth module's power supply is not isolated from other components, leading to interference. This can be mitigated by adding a capacitor or using a separate PSU for the module.

How does the addition of a 200uF Elco capacitor affect the sound quality?

Adding the 200uF Elco capacitor to the power supply of the MP3 Bluetooth module helps eliminate unwanted noise, such as the humming or 'nging', leading to cleaner, more stable audio output.

What should be done before soldering components like the Elco capacitor to avoid damaging the circuit?

Before soldering components like the Elco capacitor, it's important to disconnect the power supply to avoid short circuits or damaging the circuit. This ensures a safe and successful soldering process.

What is the significance of ensuring that the L and R connections are not reversed when connecting the MP3 Bluetooth module?

Reversing the L (left) and R (right) audio connections can cause the stereo channels to be swapped, resulting in incorrect audio output. Properly connecting these wires ensures that the left and right audio channels are correctly aligned.

How does the quality of the MP3 Bluetooth module affect the audio output?

The quality of the MP3 Bluetooth module affects the clarity and consistency of the audio output. Higher quality modules typically have better ICs (chipsets), which can produce clearer sound with fewer issues like noise or distortion.