Book Shelve Stereo Amplifiers - DIY
by profpat in Circuits > Computers
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Book Shelve Stereo Amplifiers - DIY
![2012-10-30 19.53.22.jpg](/proxy/?url=https://content.instructables.com/FR8/A4PY/I376RJAR/FR8A4PYI376RJAR.jpg&filename=2012-10-30 19.53.22.jpg)
Hi there fellow Instructablers!
I made this mini stereo amplifier for my son, it is powered by a used laptop 19V 3.43A adapter-charger. the audio source is his laptop headphone output. This amplifier will drive two bookshelf speakers. The heart of this circuit are two TDA2003 audio amplifier costing around $ 1.5 for a pair here in the Philippines. Overall cost is around $10.00 not including the laptop ac adapter and book shelf speakers. The input from the audio source is wired to a dual gang 10K volume control. Pin 1 of the volume control (variable Potetionmeter) is wired to ground, Pin 2 is wired to the input of the amplifier, and Pin 3 is wire to the rca jack. total output power is 20 watts.
Circuit Schematic Diagram
![10w-amplifier-using-tda2003.jpg](/proxy/?url=https://content.instructables.com/F83/B5HN/I376RIC6/F83B5HNI376RIC6.jpg&filename=10w-amplifier-using-tda2003.jpg)
here is the tda 2003 schematic diagram make two of this circuit for stereo or dual channel!
parts list :
- 2 pcs. TDA2003 integrated circuit amplifier
- 1 pc. 10 k Ohm stereo volume control
- 1 pc. plastic knob for the volume control
- 1 pc. perforated pcb
- 1 pc. suitable plastic casing
- 1 pc. aluminum heat sink fins
- 1 pc. dual rca jack
- 1 pc. mini stereo jack
- 1 pc. dual speaker terminals
- 1 pc. crown dc jack (adapter input)
- 1 meter soldering lead 0.8 mm 60/40
- 4 pcs. 1/4 plastic stand or double mounting tape
- 2 pcs. 39 nf ceramic capacitors
- 4 pcs. 100 nf ceramic capacitors
- 2 pcs. 10uf 25v electrolytic capacitors
- 2 pcs. 100uf 25V electrolytic capacitors
- 2 pcs. 470uf 25V electrolytic capacitors
- 2 pcs. 1000uf 25V electrolytic capacitors
- 2 pcs. 39 ohms 1/2 watt resistors
- 2 pcs. 2.2 ohms 1/2 watt resistors
- 2 pcs. 220 ohms 1/2 watt resistors
- 2 pcs. 1 ohm 1/2 watt resistors
Tools Needed or Required!
![2012-10-30 19.53.03.jpg](/proxy/?url=https://content.instructables.com/F9C/CIU5/I376RJ9S/F9CCIU5I376RJ9S.jpg&filename=2012-10-30 19.53.03.jpg)
tools
- soldering iron
- long nose pliers
- side cutter pliers
- electric drill and drill bits
- screw driver set
Assemble the Circuit Board!
![Samsung-0330.jpg](/proxy/?url=https://content.instructables.com/FFM/7U04/I376RJEF/FFM7U04I376RJEF.jpg&filename=Samsung-0330.jpg)
![Samsung-0331.jpg](/proxy/?url=https://content.instructables.com/FYU/P4A9/I376RJEK/FYUP4A9I376RJEK.jpg&filename=Samsung-0331.jpg)
![Samsung-0332.jpg](/proxy/?url=https://content.instructables.com/F06/NF78/I376RJEQ/F06NF78I376RJEQ.jpg&filename=Samsung-0332.jpg)
![Samsung-0333.jpg](/proxy/?url=https://content.instructables.com/FU4/DGN7/I376RJES/FU4DGN7I376RJES.jpg&filename=Samsung-0333.jpg)
![Samsung-0334.jpg](/proxy/?url=https://content.instructables.com/FZ7/2OS3/I376RJET/FZ72OS3I376RJET.jpg&filename=Samsung-0334.jpg)
![Samsung-0335.jpg](/proxy/?url=https://content.instructables.com/F55/Z3OV/I376RJEU/F55Z3OVI376RJEU.jpg&filename=Samsung-0335.jpg)
![tda2002amp.jpg](/proxy/?url=https://content.instructables.com/FT6/7NJ8/I376RJEW/FT67NJ8I376RJEW.jpg&filename=tda2002amp.jpg)
using the perfboard or proto board, mount all the components as in the pictures, and solder junction and connectors under and over the perfboard or proto board.
Make the Casing!
![2012-10-30 15.07.51.jpg](/proxy/?url=https://content.instructables.com/FAD/NMM3/I376RJL8/FADNMM3I376RJL8.jpg&filename=2012-10-30 15.07.51.jpg)
![2012-10-30 15.08.35.jpg](/proxy/?url=https://content.instructables.com/F50/AJ9L/I376RJKC/F50AJ9LI376RJKC.jpg&filename=2012-10-30 15.08.35.jpg)
![2012-10-30 17.59.33.jpg](/proxy/?url=https://content.instructables.com/FSC/N4N9/I376RJKD/FSCN4N9I376RJKD.jpg&filename=2012-10-30 17.59.33.jpg)
![2012-10-30 18.09.05.jpg](/proxy/?url=https://content.instructables.com/FJ2/PT6U/I376RJKG/FJ2PT6UI376RJKG.jpg&filename=2012-10-30 18.09.05.jpg)
with your suitable plastic casing, drill out for mounting the hardware. use masking tape for the pencil marks.
Install the Circuit Board Inside the Casing!
![2012-10-30 15.08.16.jpg](/proxy/?url=https://content.instructables.com/FY0/UCGO/I376RK10/FY0UCGOI376RK10.jpg&filename=2012-10-30 15.08.16.jpg)
![2012-10-30 15.07.33.jpg](/proxy/?url=https://content.instructables.com/FMX/IUJF/I376RK4A/FMXIUJFI376RK4A.jpg&filename=2012-10-30 15.07.33.jpg)
![2012-10-30 15.08.03.jpg](/proxy/?url=https://content.instructables.com/FZQ/VSD0/I376RK7I/FZQVSD0I376RK7I.jpg&filename=2012-10-30 15.08.03.jpg)
After drilling holes for the hardware, install the circuit board and assemble everything in place!
Your Finished Book Shelf Stereo Amplifier
![2012-10-30 19.58.32.jpg](/proxy/?url=https://content.instructables.com/FQJ/CKVL/I376RL9C/FQJCKVLI376RL9C.jpg&filename=2012-10-30 19.58.32.jpg)
![2012-10-30 19.52.45.jpg](/proxy/?url=https://content.instructables.com/FTZ/XHMZ/I376RL9T/FTZXHMZI376RL9T.jpg&filename=2012-10-30 19.52.45.jpg)
![2012-10-30 19.53.03.jpg](/proxy/?url=https://content.instructables.com/FPA/0E0T/I376RL9U/FPA0E0TI376RL9U.jpg&filename=2012-10-30 19.53.03.jpg)
![2012-10-30 19.53.22.jpg](/proxy/?url=https://content.instructables.com/FFW/TMFR/I376RL9V/FFWTMFRI376RL9V.jpg&filename=2012-10-30 19.53.22.jpg)
![2012-10-30 19.56.54.jpg](/proxy/?url=https://content.instructables.com/F1X/MJH5/I376RL9W/F1XMJH5I376RL9W.jpg&filename=2012-10-30 19.56.54.jpg)
![2012-10-30 19.57.13.jpg](/proxy/?url=https://content.instructables.com/FSM/8BPW/I376RLA5/FSM8BPWI376RLA5.jpg&filename=2012-10-30 19.57.13.jpg)
![2012-10-30 19.57.43.jpg](/proxy/?url=https://content.instructables.com/F8J/XPRL/I376RLAE/F8JXPRLI376RLAE.jpg&filename=2012-10-30 19.57.43.jpg)
![2012-10-30 19.57.53.jpg](/proxy/?url=https://content.instructables.com/FMJ/9QM5/I376RLAO/FMJ9QM5I376RLAO.jpg&filename=2012-10-30 19.57.53.jpg)
![2012-10-30 19.58.15.jpg](/proxy/?url=https://content.instructables.com/FVZ/01SW/I376RLAQ/FVZ01SWI376RLAQ.jpg&filename=2012-10-30 19.58.15.jpg)
Here some photos of different views of the amplifier!
Amplifier in Use, With My Ipod and Radio Shack Book Speakers
![2012-10-31 20.19.03.jpg](/proxy/?url=https://content.instructables.com/FOB/Q4QH/I376RLV3/FOBQ4QHI376RLV3.jpg&filename=2012-10-31 20.19.03.jpg)
![Gateway 13 MT6458 ac adapter.jpg](/proxy/?url=https://content.instructables.com/FJZ/9CBP/I376RLV5/FJZ9CBPI376RLV5.jpg&filename=Gateway 13 MT6458 ac adapter.jpg)
Here, i am testing the amplifier using my ipod and two radio shack book shelf speakers. my power supply came from my old laptop. It is a 220Volts AC to 19Volts DC 4Amperes brick adapter.