R2 is 3.3 ohms (less than 10 ohms*, greater than 2) R1 is 1000 ohms, it can be small (less than 1/8W). Trying not to sacrifice high notes (treble or trills). If you want better bass it can be 10 microfarads.Ĭf can be 470 picofarads, if there is noise it can be of higher value. Pot1 is a logarithmic potentiometer from 10K to 50K.Ĭ1 if not for "Woofer" can be 1 or 2.2 microfarads from 10 volts and up. Using a TDA2003 and a few components we have a good amplifier that can work to amplify the audio output of our computer or as a test amplifier.Īccording to the manufacturer the TDA2002 is 8W and the TDA2003 is 10W.Ĭonnections, component values and voltage are the same.įor test instruments they can work with 9 Volts, as power amplifiers they work perfect with 14 volts, and it is better not to reach 18V. One of the easiest amplifiers to build (I will show the diagram and drawing). Many times I have wanted to make an audio amplifier of very good quality but there are many plans with very basic integrated circuits so I have searched and I have found an IC that has an excellent audio quality and with a supply voltage of 12VDC.
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