China's most professional brushless motor fan PCBA development factory
The working principle of the small fan is that the energized coil rotates under force in the magnetic field, and the electric energy is transformed into mechanical energy. The small fan has two engines with only pneumatic linkage and concentric shaft rotor, which is called double rotor turbofan engine. Its working principle and structural characteristics are basically the same as that of double rotor turbojet engine.
The design and development of small fan PCBA scheme is completed by brushless motor and main control chip csu32p10. The functions are as follows:
The small fan has three gear modes, l \ m \ h represents three operating gears, and the current operating mode is indicated by LED; Two keys, the red key is the shutdown key, and the green key is the mode key; A lighting LED. The specific operation methods are as follows:
1. When you click the button on the right, the gear is switched, i.e. gear 1, gear 2, gear 3, shutdown (sleep), and the LED indicates the current gear in real time;
2. In any working mode, click the left button to shut down, the LED goes out and enters the sleep mode; In the shutdown state, when you click the left button, the LED will display the battery power in real time, turn off after 5 seconds and enter the sleep mode, and the sleep current is 1.2ua;
3. Long press the right button in any state, and the LED on the right will be on. Similarly, long press the right button in any state, and the LED will be off;
4. The charging indicator light will indicate with different colors during charging and after full charge;
Chip csu32p10 chip is a high-performance single chip microcomputer with 8-bit RISC architecture and 12 bit ADC. The chip has 64 byte SRAM and simple peripheral configuration, which can meet the needs of multi-functional design on the premise of saving circuit cost. This single chip microcomputer has excellent ad measurement, including six reference voltages of internal 1.4V, 2.0V, 3.0V, 4.0V, Vdd and external input. It can realize hardware level correction of internal reference voltage and one channel of 32mhz 12 bit PWM output. It is suitable for product development in many fields.