DIY BLUETOOTH 2.1 TROLLEY SOUND SYSTEM

A new tutorial! This time I chose to build a musical instrument, based on 2.1 home theatre boards.

Things used in this project

Hardware components

• 5pcs. 500 Ohm Resistance
• 2pcs. 220 Ohm Resistance
• 4pcs. 33K Resistance
• 3pcs. 8.2K Resistance
• 4pcs. 20K Resistance
• 3pcs. 3.3 Ohm1/2Watts Resistance
• 2pcs. 0.5 Ohm 1/2Watts Resistance
• 2pcs. 27K Resistance
• 1pcs. 22K Resistance
• 2pcs. 6.8K Resistance
• 2pcs. 10K Resistance
• 2pcs. 1.2K Resistance
• 1pcs. 100 Ohm 1/2Watts Resistance
• 2pcs. 682pf Capacitor
• 2pcs. 682pf Capacitor
• 9pcs. 100Kpf Capacitor
• 1pcs. 150Kpf Capacitor
• 3pcs. 220Kpf Capacitor
• 3pcs. 4007 Diode
• 4pcs. 5399 Diode
• 3pcs. 2.2uf50V Capacitor
• 2pcs. 100uf25V Capacitor
• 2pcs. 0.1uf Capacitor
• 1pcs. 47uf25V Capacitor
• 2pcs. 10uf50V Capacitor
• 1pcs. 4558D IC
• 1pcs. 470uf16V Capacitor
• 3pcs. 22uf50v Capacitor
• 2pcs. 2200uf25v Capacitor
• 1pcs. 3MM LED
• 3pcs. TDA2030 IC
• 1pcs. 7805 IC
• 2pcs. 4 ohm minimum 15 watts Speaker
• 1pcs. 8 ohm minimum 20 watts Subwoofer
• 1pcs 12-0-12 transformer
• 1pcs 5 volt speaker module
• 2pcs 47k potentiometer
• 1pcs PCB Board from JLCPCB

Software apps and online services

• EasyEDA
• JLCPCB

Hand tools

• Soldering iron

• Drill Machine
• 400W Variable Speed Jigsaw

Story

Hey guys! I hope you already enjoyed my previous projects and you are ready for a new one, as usual, I made this tutorial to guide you step by step while making this kind of super amazing low-cost electronic project which is the "Bluetooth Trolley Speaker". During the making of this project, we tried to make sure that this instructable will be the best guide for you in order to help you if you want to make your own Bluetooth Trolley Speaker, so we hope that this instructable contains the needed documents.

This project is so handy to make especially after getting the customized PCB that we’ve ordered from JLCPCB to improve the appearance of our machine and also there are enough documents and diagrams in this guide to allow you to create your Bluetooth Trolley Speaker easily.

We've made this project in just 7 days only, just three days to get all the needed parts, and the next 4 days to finish the hardware making and the assemble.

Before starting let’s see first

What you will learn from this instructable:

• Making the right hardware selection for your project depending on its functionalities.
• Prepare the circuit diagram to connect all the choose components.
• Assemble all the project parts (mechanical and electronic assembly).
• Finally designing your own Sound System.

Step 1: What are the advantages of Trolley Speaker?

Wireless: The wireless feature is one of the biggest advantages of trolley speakers. One does not have to engage with wires.

Easy to install: Because of the installation process, people avoid buying large-sized speakers. But trolley speakers are very easy to install.

Great for outdoors: The speakers are great for those who love enjoying music 24 x 7. Because of the easy-to-carry feature, you can take the speaker while going for picnics and parties.

Step 2: The Hardware Part

Besides all the small size electronic components, we'll take 2pcs 4 ohms minimum 15 watts speaker which will use as left and right speakers and one 8 ohms minimum 20 watts Subwoofer for high bass. We'll need a 12-0-12 transformer to power-up the system and for Bluetooth connectivity, we need a 5-volt speaker module. Here we have used a 2pcs 47k potentiometer to control the Bass and Treble.

DO YOU KNOW THE TECHNICAL DETAILS OF BASS AND TREBLE?

Bass and Treble is a two-band Equalizer. The Bass control is a low-shelf filter with a half gain frequency at 250 Hz. The Treble control is a high-shelf filter with the half gain frequency at 4000 Hz.

Step 3: PCB File

You can easily download the PCB file from here and upload it for making your...