Music Box

As the title says it's one box which contains amplifier, speakers and LED :) I found that project when I was cleaning my room there was a watch box in that moment it seems like nice cleanly box and after some time i got amplifier and i started to combine these two. One afternoon i made sketch and said to myself that i must finish it, and that day i drill hole for input, output and also for turn ON/OFF and Volume Up/Down. That's how it started. Next day I experimented with Green LED and LM3915 because i wanted to made equalizer. That's it for now. After I'll explain what LM3915 do and some other stuff. :)


Let's see what do you need for it.

Parts:

• 1 - Empty Watch Box
• 1 - Amplifier 5-10W
• 1 - Prototype PCB 5x5cm (1,97x1,97 inch)
• 1 - 7.4V Battery 
• 1 - LM3915
• 20 - LED 5mm (Color? - it's up to you)
• 1 - 3.7V Battery (for supplying lm3915)
• 2 - Switch button (1st for POWER ON/OFF, 2nd for inside or outside SPEAKER ON/OFF)
• 1 - Potentiometer 
• 1 - Connector 3.5mm 
• 1 - Male To Male 3.5mm Cable
• 2 - Speaker Terminal Connector
• 50cm of wire
• + About one free day :)

On this particular project there is no so much to explain. Everything has been already made and i just need to connect each other how i imagine! First i will show you how to connect lm3915
On the lm3915 datasheet you can find simple circuit how to connect it. There is not much philosophy with connecting just wire it like on the schematic but with one little EXCEPTION that is I'll use 3.7V instead 12-20V on PIN 3. Let's see how it looks like on schematic (theoretically) and practically

Let's see the amplifier, input, potentiometer

Amplifier

Input

Potentiometer

And finally the box

Now it's time for drilling hole and mounting :)

From left to right: 1st hole is for POWER ON/OFF and 2nd for SWITCHING speakers

Input

Inside box (input)

3rd one is POTENTIOMETER

Inside box

That's the terminal connectors for external speakers

I don't have anymore picture of the final product so when i get some time i will publish them too.
Thanks for reading and looking :)
If you like it please like, comment :)