Oct 14th, 2009
by Electronics Online.
This is the circuit diagram of 10 watt stereo audio amplifier built based on single TDA2009A as the main component. This circuit will be very easy and cheap to build, nice project for junior high school students.
Component list:
R1, R3_________ 1K2 ohm
R2, R4_________ 18 ohm
R5, R6_________ 1 ohm
C1, C2_________ 3u3 50V mini
C3_____________ 22uF 16V
C5_____________ 100uF 35V
C6, C7_________ 220uF 10V
C10, C11_______ 2200uF 35V
C4, C8, C9_____ 100nF
IC_____________ TDA2009A
Heat sink
You can download the 10 Watt Amplifier with TDA2009A in PDF version schematic diagram from HERE
Sep 23rd, 2009
by Electronics Online.
This simple amplifier circuit will be nice for newbie project/junior student. Require an IC LM386N to build a mono channel amplifier. There are few components such as capacitor, resistor, potensiometer and speaker in this circuit, so the students will know the real shape of components.
Parts List :
Capacitors :
C1, C5 2.2 uF / 50Vecap _________2
C2, C9 10 uF / 25V ecap _________2
C3, C7 100 nF mono (104) ________2
C4 100 uF / 16V ecap ____________1
C6, C8 470 uF / 16V ecap ________2
C10, C11 47 nF mylar (473) ______2
Resistors :
R1, R2 10 ohm ___________________2
Pot 1 10k ohm stereo pot ________1
Misc. :
IC 1, 2 LM386N __________________2
8 pin IC socket _________________2
Jun 19th, 2009
by Electronics Online.
Here the simple and unexpensive 100W power audio amplifier. This circuit should be easy to made.. 
Use this power supply circuit:
Mar 31st, 2009
by Electronics Online.
This amplifier circuit design is based on the 18 Watt Audio Amplifier, and was developed mainly to satisfy the requests of correspondents unable to locate the TLE2141C chip. It uses the widespread NE5532 Dual IC but, obviously, its power output will be comprised in the 9.5 – 11.5W range, as the supply rails cannot exceed ±18V.
As amplifiers of this kind are frequently used to drive small loudspeaker cabinets, the bass frequency range is rather sacrificed. Therefore a bass-boost control was inserted in the feedback loop of the amplifier, in order to overcome this problem without quality losses. The bass lift curve can reach a maximum of +16.4dB @ 50Hz. In any case, even when the bass control is rotated fully counterclockwise, the amplifier frequency response shows a gentle raising curve: +0.8dB @ 400Hz, +4.7dB @ 100Hz and +6dB @ 50Hz (referred to 1KHz).
Mar 10th, 2009
by Electronics Online.
Here the schematic diagram of 60 watts power audio amplifier. The main components is a pair of power transistor 2N3055.
Further information, please visit this page
