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Category: Inside Circuits Views: 1535 Rank: 10 Nice small audio amplifier which use only few parts to give good quality sound. This amp can be used as a simple booster, the heart of a more complicated amplifier or used as a guitar amp. Although not perfect, this amplifier does have a wide frequency response, low harmonic distortion about 1.5%, and is capable of driving an 8 ohm speaker to output levels of around 8 watts with slightly higher distortion.  Any power supply in the range 12 to 18 Volts DC may be used. Datasheet file1: Click here to download TDA2003.pdf datasheet.
Related circuits The output frequency of the VCO, U1, varies inversely with the input voltage. With a 1 "V input, the oscillator output frequency is about 1500 Hz; with a 5-V input, the output frequency drops to around 300 Hz. The output frequency range of U1 can be altered by varying the values of C1, R2,... Offset controlled stereo amplifier circuit This stereo amplifier use the NE5517/A and has an excellent tracking of 0.3 dB typical easy. With the potentiometer, Rp, the offset can be adjusted. This simple window detector uses only half of a 7400 quad NAND gate plus four resistors, chosen so that the voltage at point A exc.,eds the voltage at point B for any input voltage. With no input applied or when VIN is at ground, the output of gate Gl is one; hence G2"s output is also one. As... The circuit use two unijunction transistors. The low-frequency sawtooth generated by Ql modulates the high-frequency tone generated by Q2. Uses CA3410 quad BiMOS op amp to sense small currents. Because the op amp"s input current is low, a current of only 1 p.A passing through the sensor will change After one cycle of operation, SCR 1 will be on, and a low value of voltage is applied to the UJT emitter circuit, interrupting the tuning function. When pushbutton SI is pushed, or a positive going pulse is applied at point A, SCR 2 will turn on, and SCR 1 will be turned off by commutating... A SN7400 quartz crystal and a resistor provide a square-wave output of approximately 3.5 V. Some circuits that add binary numbers have problems with time delay caused by carry propagation. This has been DIY Audio Amplifier (Musical Electronics - 2)
CDC Electronic Workshop - Let's Desighn an Audio Amplifier
Comments
esat wrote on Nov 18, 2007
thanks
muwanga sam bright wrote on Jun 24, 2008
the way the circuit is displayed is not complete in that one can't adopt it in his project
baba wrote on Jul 8, 2008
These circuits are not using Electronic Experts, Only beginers, So you may present with more details , except circuit diagram , like part details , PCB desing ect...
J.Doe wrote on Aug 31, 2008
Have a look at the TDA2003s datasheet(from where this circuit originates).
You'll find a PCB layout and all you asked for.
joe wrote on Mar 5, 2009
You can buy a kit or a ready-assembled board (just add battery, input and output connections) from www.maplins.com
M.A. Sheikh wrote on Apr 3, 2009
This circuit when connect to heavy pre-amplifier,doesnt work ..Any sugesstion?
Julz wrote on Mar 6, 2010
This circuit will not function greatly
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