Skip to main content


Showing posts with the label Car Audio

Audio Amplifier for Car Radio TDA7374B

Description: The TDA7374B is a new technology class AB Audio Dual Bridge Power Amplifier in Multiwatt package designed for car radio applications. Thanks to the fully complementary PNP/NPN output configuration the high power performances of the TDA7374B are obtained without bootstrap capacitors. Circuit diagram:

30W Power Audio Amplifier Circuit Diagram

Description: TIP141 si a npn silicon power darling tons designed for complementary use with TIP145, TIP146 and TP147. Can stand up to 125 W at 25°C Case Temperature, 10 A Continuous Collector Currentand has a minimum hFE of 1000 at 4 V, 5 A. This home audio amplifier can output 30W with a +- 32V symmetric power supply. If you want a stereo power amplifier please check out the other schematics. Features:
Circuit diagram:

Layout PartlistR1=1KohmR16-17=270ohmD1=9.1V 0.4W zenerR2=47KohmR18=22ohm 1WD2-3=1N4148R3=1.5KohmR19=NCQ1-2=BC550CR4-5=10KohmR20-21=0.39ohm 4WQ3=MPSA56R6=5.6KohmTR1=250ohm trimmerQ4=BC547BR7=10ohmC1=470nF 100V MKTQ5=BC212R8=47KohmC2=1nF 100V MKTQ6=BC183R9=560ohmC3=68pF ceramicQ7-8=MPSAO6R10-11=8.2KohmC4-8=22nF 100V MKTQ9=TIP141R12-15=120ohmC5-6-7=100nF 100V MKTQ10=TIP146R13=680ohmC9=47uF 25VF1-2=1.6AT FUSER14=330ohmC10-11=220uF 63VAll the resistors is 1/4W 1%except quote differently

200 Watt Stereo Car Amplifier

Circuit Description
IC TA8210AH By using this you can apply a series of audio power amplifier is the car audio system. In general, all the speakers in the car using a subwoofer speaker, and woofer. Because the car is not big room so the sound is being required is not too high. Audio amplifier circuit can work at a minimum voltage 12-volt DC, if supplied under voltage 12-voltamplifier work will be less than the maximum. This amplifier output power up to 200W or 2 x 100W stereo with 8 ohm impedance. Circuit Diagram
Part List :
R1 =1K
R2 =50K trim
R3 =1K
R4 =50K trim
R5 =680R
R6 =680R
R7 =150K
R8 =2R2
R9 =2R2

C1 =1uF
C2 =1uF
C3 =47uF
C4 =47uF
C5 =100n/400V
C6 =220uF
C7 =220uF
C8 =100n/400V
C9 =100n/400V

Intregated Circuit

X2-3=in R
X2-1=in L
X1-1,X1-2=Out R
X1-3,X1-4=Out L

Car audio amplifier with IC TA7203P

Circuit Diagram
Circuit Description

Stereo car power amplfier with TA7203P , is suitable for the room your car , your car it will build an increasingly crowded and felt like using high-class amplifiers and speakers. Simply using this circuit and some speaker subwoofer speakers you can enjoy it.

Technical information :

Max voltage = 20 VoltMin voltage = 8 VoltMax output = 2 x 40 WattRL = 8 Ohm

14 Watt car audio amplifier circuit

Basic operation of this amplifier is on IC TEA2021 ,

In this circuit minimum require voltage is 4 volts and maximum voltage 25 volts. Power output 14 Watt with 4 Ohm impedance. See this schematic.

Car Amplifier with IC LA4445

This circuit using IC LA4445 , this is stereo amplifier with power output 2 X 18 Watt, with this circuit you can use to car amplifier or to other elctronics device. Speaker use woofer with impedance 4 Ohm with power up to 20 Watt. Minimum voltagte require 10 Volt and maximum voltage 18 volt.
If you can't operate the circuit , please check IC , and then voltage in. If voltage is good check the component are. If components are working . Please check speakers.

Car Subwoofer

Subwoofer filter LM 741

Description for Subwoofer filter LM 741:
     If you like I want some more bass in your stereo, you can switch a subwoofer there. This is a speaker that only reflects the bass. Below is a circuit to ensure that the subwoofer gets really only the bass.  This circuit is used between the signal source (mixer, CD player) and the amplifier. It is an active filter, better than passive filters which are generally mounted behind the amplifier. The circuit is mono because the bass for both channels are equal. The human ear can not yet determine the direction of this bass.  The first 741 is used as a mixer amplifier. The gain is adjustable with P1. Then, the signal is applied to a second of the order Butterworth-filter. C A(C1 + C2) and C B (C3) can be calculate using the following formulas: where F k , the crossover frequency (the frequency at which filter stops the transmission of sound), pi = 3.1416, R = R3 = R4, F k in Hertz, and C. F. As shown, the filter is now set at 240 Hz. , the supply…

Mobile Car Stereo Player TDA1554

Using a mobile phone while driving is dangerous. It is also against the law. However, you can use your mobile phone as a powerful music player with the help of a stereo power amplifier. This does away with the need of a sophisticated in-dash car music system. Most mobile phones have a music player that offers a number of features including preset/manual sound equalisers. They have standard 3.5mm stereo sockets that allow music to be played through standard stereo headphones/sound amplifiers. Nokia 2700 classic is an example.

Mobile Car Stereo Player Circuit Diagram

     A car audio amplifier with 3.5mm socket can be designed and simply connected to the mobile phone output via a shielded cable with suitable connectors/jacks (readymade 3.5mm male-to-male connector cable is a good alternative). Fig. 1 shows the circuit of car stereo player. It is built around popular single-chip audio power amplifier TDA1554Q (IC1). The TDA1554Q is an integrated class-B power amplifier in a 17-lead …

Separation filter crossover for car subwoofer

The figure shows a circuit diagram of car crossover (cr
ossover) for the subwoofer. The input stage of the transistor Q1 is a differential summing amplifier, and the switch S1 is used to switch polarity. Switched-capacitor filter with a slope of 24 dB per octave (chip IC1) is the basis of continuously tunable filter. Potentiometer R13 controls the filter cutoff frequency on the chip IC1, adjusting its clock speed. Because the switched-capacitor filters, by definition, work with discrete signals at the input of IC1 should be restrictive filter (antialiasing). Such a low pass filter of the second order constructed by transistors Q2 and Q3 and associated elements. The output signal of IC1 via pin 5 served on a subsonic filter with the possibility of lifting the lowest frequencies. When switch S2 is closed, then on the rise of the frequency characteristic occurs. Additional filtering is provided by infrasound capacitors C1 and C2 directly to the input of the crossover. The resistor R18 and…

Circuit diagram capacitor charge control

The scheme is designed to protect against inrush current when the battery uncharged capacitor on-board network. Who has not tried to include uncharged faradnik network without limiting resistor - better not ... At a minimum, get burnt contacts.

When you turn the discharged capacity in network capacity C1 is discharged, T1 (n-MOSFET switch with low channel resistance) is closed.Capacitance C2 (the same faradnik) is charged through a low-resistance R5. T2 opens almost instantly, the shunt to ground C1 and T1 gate.When the potential negative terminal C2 falls below 1V (charge to Uakb - 1B), T2 closes smoothly C1 is charged to about 9/10 Uakb opening T1. The time constant R2C1 is large enough so that the current surge T1 (pre-charge C2 +1 V to Uakb) does not exceed the rating for T1.
In the future, the negative terminal of C2 constantly shorted to ground through T1, regardless of the direction CURRENT T1 (both literally - from drain to source, and in the opposite direction). Nothing wrong w…

Sound in the car

It is known that for many motorists machine evolved into something more than just a means of transportation. After all, the person conducting the wheel for several hours a day, not only wants to listen to the local news, but good music. However, high-quality automotive interior equipping reproducing unit, few who can manage only industrial products. In recent years in the amateur literature appeared many publications devoted to independent manufacturing automotive audio equipment, mainly amplifiers. But even a good amplifier does not solve all the problems faced by the creator of Sound Hi-Fi class for its attitude avtomobilya.Skepticheskoe many motorists to leave such systems due primarily illiterate approach to installing speakers in the cabin.Unfortunately, in most cases, they are placed in the car according to the principle "to fit", not "where it is necessary." However, an unambiguous answer to the question - "Where else do you want?" - Does not exist.…