Feb 17th, 2010
by Electronics Online.
This is a high quality audio class AB amplifier in hi-fi applications. It has very low noise and distortion, wide bandwidth and good output current capability, enabling it to supply high power into both 4Ω and 8Ω loads. It has both short circuit and thermal protection, so is quite robust.
Component part list:
R1_____________ 150R
R2, R3, R5_____ 10K
R4_____________ 680R
R6_____________ 22K
IC1____________ TDA 7294
Heatsink
|
C1____________ 1u5F or 1u
C2____________ 2n7F
C3, C6________ 22uF 63V
C4, C5________ 10uF 63V
C7, C9________ 2200uF 50V
C8, C10_______ 100nF |
Jan 15th, 2010
by Electronics Online.
This amplifier circuit will be nice for your car audio system. The circuit is simple, easy to build and not required large box or space.
The TDA1553CQ is a monolithic integrated class-B output amplifier in a 13-lead plastic DIL-bent-SIL power package. It contains 2×22 W amplifiers in BTL configuration. The device is primarily developed for car radio applications.
Dec 11th, 2009
by Electronics Online.
This is another simple schematic diagram of 25W power audio amplifier using single IC LM1875.
Component part list
R1 _____________ 1K
R2 _____________ 1M
R3 _____________ 22K
R4 _____________ 10K
R5 _____________ 180K
R6 _____________ 1R
IC1 ____________ LM1875
|
C1 _____________ 1uF 50V
C2,6 ___________ 100nF
C3 _____________ 22uF 63V
C4 _____________ 0.22uF
C7,5 ___________ 220uF 50V
Miscellaneous:
Fuse holder & cover
2 amp fuses |
Oct 19th, 2009
by Electronics Online.
This is a simple audio mixer circuit diagram:
You can add some resistors in parallel connection for more audio input. To adjust the volume for each input channel, add linear trimmer or potentiometer with configuration: pin1> ground; pin2>output; pin 3>input.
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
