Hi everyone here is my first instructable which is on simple audio systems.
it is a mini portable mobile phone speaker made completely of waste materials of zero of cost.
try this yourself n enjoy!!
Step 1: Things Needed
Bill Of Materials:
soldering iron,wire cutter,tweezer,mini knife etc
IC 8002 (class-D audio amplifier) 8 pin DIP
10 k variable resistor
120 k resistor
0.1 mfd capacitor
10 mfd capacitor
1n 4001 diode 2
330 ohms resistor 2
pcb (small piece of dotted vero board)
speaker 1.5 inch 3 W
3.7 V Li ion battery
small wire pieces
micro usb port from old mobile phones
tin or box of hair gel etc
Step 2: Circuit Work
The heart of this project is the amplifier circuit based on 8002 class d audio amplifier.
8002 or sometimes 2009 is one of the versatile ICs among amplifier ICs.It's operating voltage starts from 3v , so it is easy to use this in portable applications.
First thing to do is realise the circuit diagram on a pcb as small as can.Using smd ICs and components'll help you to achieve this .I've used smds so that my circuit such small.
After making the circuit make sure that it is working fluently by checking it.
Step 3: Craft Work
Now you have to make a perfect enclosure for the speaker.
Take the hair gel tin or box you got and make hole for the speaker accurately .
Fix the speaker using glue.
Then make the holes for on/off switch,volume controller,charging port,audio jack etc.
Fix all the things using glue.
Now attach the circuit to the on/off switch,speaker,charging port etc.
Connect the leds on the circuit board as shown in the circuit diagram and fix them on the hair gel bottle.
Connect the battery as per the circuit diagram and place it in the enclosure safely.
Close the enclosure and use some stickers for it to look cool.
You can now play it and re-charge using you samsung phone chargers.
Make it youself , enjoy every seconds of your life