You can watch the video first before reading this post.
For so long i wanted to make an audio amplifier to enjoy my music i used
the well know IC lm386 but it wasn’t e enough to power big speakers so i changed the IC to TDA2003 . im going to show you now how to make a nice and powerful amplifier.
Step 1: Tools and parts
For this project you will need the following parts:
10 uf cap
470 uf cap
220ohm resistor
2.2ohm resistor
39 nf
39ohm resistor
1000uf cap
2X 100nf
2X100uf
3 X connectors (see the photo)
TDA2003(you can buy it from http://www.kynix.com/Detail/777791/TDA2003A.html)
12v to 18 v adapter and make sure its 2A at least (prefer 3.5A)
for the tools you will need:
soldering iron
PCB
soldering wires
Step 2: Schematics
Here is the chematics in case you couldnt find the 39nf (its hard to find) then you can go with 33nf cap and 47 ohm resistor.
Step 3: Printed bored
you can ether use a printed bored or a normal throw hole PCB i will provide better quality in a link later
Step 4: Bending the TDA2003 pins
like you have seen in step3 the printed the holes will not match with the TDA2003 that’s why you need to carefully bend them a little so they can be in the photo and then solder some left over parts to them (led pings/resistors…) you need to extend the legs so they don’t broke (i broke my first tda2003)
Step 5: BE careful&&success!!
If your are going with the PCB type don’t rush things and always check again and again before powering so you don’t end it with this.!!!