In matters of vital tourism buses and schools need the presence of a zoom (amplifiers) With adequate capacity To run a set of speakers or the subwoofer to be distributed in an area of the bus Interior to be on its way radio instructions or descriptions of things and describes the journey Tourist sights
Explain the electronic circuit
Our project is described Technical circle meets all these requirements. And follow-up fee Technical illustrated the use of transistor European number in the function of pre-amplifier or Initial Pre-Amp and rose from the input signal dynamic microphone placed on the base Transistor through the condenser and chemical resistance 1K 47μF and voltage breaker rule A 68K resistance and processing resistances 10K + 10K plus them intensive 22μF chemical and which are at the same time recharge controlled between a part of Collector output and income base, and resistance to 10K plus 18K resistance are carrying Complex with the use of intensive chemotherapy 22μF order to stabilize the voltage. And the output signal after Delivered to zoom up key and volume down and Volume is the resistance changing $ 50 kilo ohms through the condenser 0.1μF The amplifiers and speakers incentive Drivers Vocal ability has been used by the integrated number TDA2005S and notes that the addition of Letter S at the end of the integrated number indicating that they mainly dedicated to the work of the stereo Therefore, we must note at this point to buy and not buy the same number of integrated-free Of the letter S.
And in the return line, we find that the conduct of the reference level abroad and controlled by Alveleom delivers integrated to my income by 1 and 5 by cross-resistance with the use of 22K 0.1μF capacitor link capacity of each of my income is income that is integrated and that each income Speaker of Op. Amp non-reflector-to-face reference.
And an indication of emerging after zooming get them in line two by 8 over the intensive Chemical 2200μF to a number of 4 amplifiers for voice objection each 4 ohms and the line The second by 10 to four amplifiers sound similar (four amplifiers are installed each line In the roof of the bus all over the passenger seat set at equal distances in Elegant container sold ready for this purpose).
And the feeding system, the amplifier will depend on the feeding 12-volt car battery with Note that the highest continuous effort allowed in the OS is 14.4 volts.
Remained final word and it is possible to use this amplifier to work in places or cellular Camps on the 12-volt battery liquid or in the middle room on the feeder. Circuit operation amplifier 20 watts, which works Palmtalat and transistors and Ad Hoc to work within the tourist buses or cars