Circuit as shown in the following figure, first of all, this machine is a pure post-stage power amplifier, Figure 1 is a single sound channel pre-amplification circuit, signal input side cannon socket and 5 sockets are balanced input mode, can be standard balance with the mixer.
TDA2030A pin function: pin 1 is a positive input terminal; Pin 2 is the reverse input end; Pin 3 is the input end of the negative power input plate; 4 feet are power right to loseOutgoing end; Pin 5 is the positive power input. 2, the schematic diagram is as follows: 3, TDA2030A is an audio power amplifier circuit produced by Delu Fenggen, using V-type 5-pin single-in-line plastic package structure.
W-100W power amplifier circuit Simple 50W-100W voltage form of audio power amplifier, the circuit belongs to voltage form of power amplifier, the biggest advantage is that the production is very simple! As long as you follow the method above the circuit diagram, you can succeed once. Debugging methods are also simple.
TDA8510J is a dual channel 2 x 13 W or BTL bridge 1× 26W power amplifier chip, with a simple peripheral circuit, complete protection functions.
First, a power amplifier circuit diagram is an example of a circuit diagram that shows the connections and layout between power amplifier devices and components. Through the power amplifier circuit diagram, we can understand the type and number of power amplifier devices, as well as the electrical connection between them.
Its role is mainly to amplify the weaker signal input by the sound source equipment to generate a large enough current to push the speaker to replay the sound.
The production principle of the lamp is relatively simple, usually composed of a lamp base and a lamp shade. The lamp holder is made of metal or plastic, with a bulb socket inside, which is driven by an electric current while working. The lampshade is selected in different materials and shapes according to the design style and use.
The production principle of the small lamp is as follows: touch type. The principle of the touch table lamp is to install an electronic touch IC inside and form a control loop with the electrode at the touch of the table lamp.
To make a brighter lamp, you can use the principle of light reflection. Specifically, mirrors can be used to collect and reflect moreThe light and focus it onto the bulb. A highly reflective material can also be used to cover the base and lampshade of the lamp to increase the reflected light.
Make a small lamp: Preparation steps: One: an old paper box, not too broken, put it around the green non-slip paper, can soothe the eyes. Two: a pair of scissors, a number of glue, a battery, three wires, a small light bulb (can be bought in the equipment store).
Steps Prepare materials. Step Then cut out a rectangle of the appropriate length from the cloth. Step Glue the cotton cloth to the paper cup with white latex and trim the top and bottom ends of the paper cup neatly. procedureWhen the circuit enters protection due to overvoltage, the performance is that there is 12V, 24V output at the start of the moment, and then it drops to 0V.
3, the voltage regulator application surge protection circuit: the voltage regulator breakdown at the exact voltage, which makes it can be used as a limiting or protective element, because a variety of voltage regulator diodes can be obtained, it is particularly suitable for this application. Voltage regulator diode D is used as overvoltage protection device.
4, see what level of protection you need to achieve, simple point, direct and varistor on the line complex point good point then use two levels of protection, beforeVaristors are used in the back, and inductors are used in the middle.
5, the overvoltage protector is mainly suitable for home circuits, because the voltage value in the circuit can be maintained in a relatively stable state, the electrical appliance in the circuit has played a certain protective role, which is the main function of the overvoltage protector.
6, the desktop computer monitor indicator light is not bright and does not show may be the display power system failure. The light's off. Most likely a blown fuse. The filter circuit, rectifier circuit, soft start circuit, main switch circuit, overvoltage protection circuit and other faults of the power system will cause the displayThe indicator light is not on.
D/A conversion is realized by DAC0832. DAC0832 pin function description: DI0~DI7: data input line, TTL level. ILE: Data latch allows control signal input line, active at high level. CS: chip selection signal input line, low active. WR1: write select communication number for the input register.
DAC0832 is now used to output triangular waves, and the circuit diagram is shown on the right. Set DAC0832 port address is 0FFF0H, please write the implementation idea and give the core code.
DAC0832 is a commonly used digital touch converter, it has two connection modes, one is voltage output mode, the other is current output mode, for the convenience of design, the voltage output mode is selected, as shown in the circuit diagram, Iout1 and Iout2 indirect reference voltage, VREF output can control the voltage signal.
1. XA8002D audio amplifier chip with 3W power output at supply voltage 5V and distortion 10%, the pin order is the first pin under the dot mark, and then the first pin is arranged in counterclockwise order. Typical applications are shown below.
2, another model is HXJ8002, is a single channel 3W, BTL bridge connected audio power amplifier, belongs to class AB power amplifier. It is capable of operating at 5V, 3Ω load, and provides THD10% with an average output power of 3W. 2X3W requires two 8002 chips.
3. OverviewThe HXJ8002 is a single channel 3W, BTL bridge connected audio power amplifier. It is capable of operating at 5V, 368 loads, and provides 10% THD with an average output power of 3W.
4, V AC through the transformer, bridge rectifier output 36V unstable DC, and then through the capacitor filter feed LM317 input on the DC low resistance audio amplification signal, output to the speaker.
5, is assembled with TDA2030 integrated block, the surrounding components are relatively few, as long as the welding is absolutely successful according to the requirements of the circuit diagram, the power is alsoNot small, the sound quality is loud, shock, can drive 5 ~ 10 watt 6 inch bass speaker, especially as a computer desktop audio is ideal.
6, the figure is dual power supply, so the bias resistance R6 can be directly grounded. However, if you use a 5V single power supply, the R6 can not be directly grounded as shown in the figure, otherwise the input stage of the op amplifier will be cut off and lose the amplification effect.
1, ha ha, look at the picture, this is a dual-channel headphone socket schematic, in which 1 foot grounding (earphone, speaker common ground), 2 and 4 feet connected to the power amplifier output (CC5 negative), 3 and 5 feet connected to the power amplifier speaker. As for the 1-5 foot distinction, because there is no such socket at hand, you can not give the picture, you can use a multimeter to distinguish.
2, 04 capacitor is too small, can only do high-frequency decoupling can not do filtering. It is recommended to change to more than 100μF, preferably 470μF, close to the 2 feet of 2822 as close as possible; 2,7The foot (signal input) must add about 10k resistance to the ground in order to obtain a suitable input impedance; Coupling capacitors can not be saved, it is best to use non-polar capacitors.
3. Rely on when you need to recover. However, the original potentiometer should be removed from the circuit board, otherwise the two potentiometers can not interfere with each other and work normally. Volume potentiometer commonly used 6 pin and 8 pin potentiometer, of which 6 pin connection method refer to the following figure, if it is the kind of 8 pin, generally the left two are used to do equal loudness, you can not connect.
4, first of all, to detect the positive and negative power supply end of the power amplifier and the signal input and output end to the ground resistance. It is best to use the high conversion rate of the op amp NE5532 or NE5535 replacement for more accurate detection.