Fujibao luxury remote control floor fan circuit

This series of fans does not come with a circuit diagram. The author has drawn its circuit diagram based on the luxury remote control floor fan FS-40E8, which is now introduced for readers' reference. Figure 1 is the control circuit diagram of the receiving board. Due to the use of the fan dedicated integrated circuit BA8206BA4K, which integrates infrared receiving amplification, decoding, timing control, LED driver and other functions, it has the characteristics of simple structure, safety and convenience, no need for debugging, etc., and it is easy to Homemade, it can be used to transform traditional mechanical speed fans. The 220V mains power is reduced and current-limited by FUSE, C7, R8, and R9, rectified by D1, stabilized by ZD1, and filtered by C5 and C6 to form a 5V DC voltage, which supplies power to pin {14} of IC1 and the infrared receiver. The infrared receiving head sends the received signal to the {1} pin of IC1, and then controls the corresponding action after internal decoding. Each time the remote control operation key is pressed (the same as manual control), IC1{15} pin outputs a negative pulse with a period of about 0.5s, and the buzzer sounds once to indicate that the key operation is valid. When shutting down, IC1{15} pin outputs a negative pulse with a period of about 1s, and the buzzer sounds slightly longer to prompt the fan to shut down. When powering on for the first time, press the power button and the fan will start in medium wind mode. It will return to low wind mode in three seconds and the corresponding indicator light will turn on. Press this button again to cut off the motor power and stop the fan. The control circuit can memorize the operating mode before shutting down. When it is turned on next time, it will run in the memorized state, but the timer mode will not be memorized. When the fan is running, press the fan speed button, and the fan speed will cycle through low → medium → high → low, and the corresponding indicator light will light up. Press the timer button. Each time you press it, the timer will increase by 0.5 hours, with a maximum timer of 7.5 hours. Each time you press it, the corresponding indicator light lights up. When all four timing time indicator LEDs are off, the timing time is infinite. The fan is running in the timing state, and the corresponding timing indicator light will go out as time passes. In other words, the remaining time can be seen from how many timing LEDs are still lit. Press the shaking button and the fan will start to swing left and right. Press this button again to stop swinging. Figure 2 is the infrared remote control transmitting circuit, which consists of the encoder BA5104 and the infrared transmitting circuit. K1~K8 and ground form the key switch circuit, and only K1~K5 are used here. The command is amplified by transistor Q and drives the L1 infrared transmitting tube to emit the encoded infrared remote control signal. The power, wind speed, timing, and rocking buttons on the remote control transmitter correspond to the manual operation buttons on the receiver. However, a "wind" button is added to the remote control transmitter. Press this button to remotely control the fan from normal wind to natural wind. Wind→sleep wind→normal wind cycle operation (there is no wind button on the receiving board). Normal wind refers to the constant air supply of the fan at high, medium or low speed set by pressing the wind speed key. Natural wind is divided into strong, medium and weak natural wind, which is set with the wind speed key. Sleep fan refers to a people-oriented intelligent air supply mode, where the fan operates in an intelligent fuzzy manner. When set to strong sleep wind, the fan operates as strong natural wind for half an hour, then switches to medium natural wind, and then switches to weak natural wind after half an hour, until the preset time is reached and stops. When set to medium sleep wind, the fan operates as medium natural wind for half an hour and then switches to weak natural wind; when set to weak sleep wind, the fan operates as weak natural wind until the preset time is reached and stops. Although this fan has a "wind" button on the remote control, when the button is pressed, only the buzzer sounds, indicating that the button is valid when pressed, but there are no strong, medium, or weak sleep wind indicator lights on the panel. It can only be used according to the blowing conditions. In addition, if the remote control is damaged or lost, the "Wind" mode will not operate because there is no "Wind" button on the main panel. Based on this situation, the author made corresponding changes in the circuit and added a light-emitting diode to indicate changes in wind type. The method is: leave the original IC1{8} pin unused, connect an external 100Ω resistor to the IC1{8} pin, and then connect two LEDs to indicate natural wind and normal wind respectively. At the same time, connect an LED to one end of IC1{5} pin and R6 to indicate sleep wind. The solid LED and resistor marked with  in the picture were added by the author. The LED can be led out with a flexible cable and fixed at the appropriate position on the panel. In addition, if the user's remote control is damaged or lost during use, a wind button can be added to the host panel. The method is to string a micro switch between the {5}th pin of IC1 and the ground (see switch K in Figure 1), so that manual "wind" mode operation can be achieved.