1. Replace the 48-volt to 12-volt DC\/DC converter with a 48-volt ± 12-volt DC\/DC converter.
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2, purchase an SD card decoding board, a 7805 three-terminal voltage regulator.
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3. Remove the transformer and AC input line in the chassis, install a DC\/DC converter at the position of the transformer, and connect the red and blue thick and soft 48-volt input wires to the input end of the DC converter through the AC input hole. Weld the DC converter to the corresponding positions of positive 12 volts, ground and negative 12 volts at the rectifier output end.
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4, the SD card decoding board is fixed at the appropriate place on the edge of the speaker, processing an outward opening, the card opening faces outward, easy to insert the SD card. The decoding board uses a 5 volt voltage, and connects the positive 12 volts inside the machine to the 7805 input end, and connects the positive and negative 5 volts of the output to the decoding board. The decoder board outputs two wires of about 1 volt audio signal, distinguish positive and negative polarity and connect to the audio input terminal of the power amplifier, the left and right channels are connected together, the negative terminal is grounded, and the original signal input wire is removed and not used. 5, turn on the 48V power supply and insert the SD card with MP3 or WMA format songs to listen. 6. After normal, pack the box and hang it on both sides of the rear frame of the car, you can enjoy the music.
Hello, if you want to connect your electric car to the audio line, you can follow the following steps:
1. Determine where you want to install the sound: the best position is in the middle of the body, which can ensure that the sound of the sound is evenly distributed.
2. Choose the right audio: Choose the audio that is suitable for your electric car, it is best to choose a compact, durable, waterproof and dust-proof audio.
3. Determine the power supply: You need to determine the power supply of the audio, the electric car can be powered by the vehicle battery, or it can be connected by an external power supply.
4. Connect the audio power cord: Connect the positive and negative terminals of the audio respectively to the positive and negative terminals of the electric vehicle power supply.
5. Connect the audio source cable: Connect the audio source cable to the audio and audio source devices (such as mobile phones, MP3, etc.).
6. Install audio: Fix the audio on the car body, pay attention to fixing firmly, so as not to loose during driving.
7. Debug the sound: After the installation is completed, debug the volume and sound quality of the sound to ensure normal operation.
Please note: Before installing the audio, please read the installation instructions carefully to ensure your safety.
The electric vehicle wants to connect the audio equipment, such a line connection must be connected through the positive wire output key control, the electric vehicle audio equipment connection must be through the positive wire key switch, enter through the button, through the switch to control the audio wiring, so it is necessary to distinguish the positive and negative terminals of the audio equipment normal connection key door can appear, Hopefully the answer will help you.