CN203261529U - RC model LED lamp band wireless control system - Google Patents

Abstract

The utility model relates to a wireless control system for RC model LED light strips, which belongs to the control application field of RC models (ship models, car models, aircraft models, etc.), and is specifically a kind of model receiving device and power lithium battery to control the opening, closing and switching of LED light strips. Flashing wireless control system. Including microcontroller, power supply circuit, reset circuit, crystal oscillator circuit, programming port and LED switch circuit, one end of the power supply circuit is connected to the power supply, the positive pole of the power supply is electrically connected to the input terminal of the 7805 through four series diodes, and the output terminal of the 7805 is connected to the single chip microcomputer The VCC of the 7805 is shared with the 7805 through a 0.1uF capacitor; the INT0 and INT1 interrupt ports of the MCU are responsible for introducing the PWM signal, and the PA0, PB1, and PB2 of the MCU are respectively connected to three identical LED switch circuits; the LED switch circuit It includes a triode and a field effect tube. The base of the triode is connected to the microcontroller through a series resistor, the collector of the triode is connected to the power supply through a series resistor R3, the emitter of the triode is grounded, and the G pole of the field effect tube is connected to the collector of the triode. The electrodes are connected, the S pole of the field effect tube is grounded, and the two ends of the LED strip are respectively connected to the power supply and the D pole of the field effect tube.

Description

An RC model LED light belt wireless control system

technical field

The utility model belongs to the control application field of RC models (ship models, car models, aircraft models, etc.), and specifically relates to a wireless control system that controls the on, off and flickering of LED light strips through a model receiving device and a power lithium battery.

Background technique

At present, the model LED modules for night flight that can be found on the market are mostly used to control a very small number of LED light-emitting diodes. They are very bright and have all-round functions when viewed from a close distance. However, many problems they face have yet to be solved. First of all, most of the modules on the market use RC model receiving modules for power supply. Although the power required by the modules is very small, this is also the case, which limits the number and brightness of LED light-emitting diodes. No matter how bright the LED light-emitting diode is, it will go far , and its brightness is negligible. Secondly, if individuals increase the number of LED light-emitting diodes by themselves, resulting in an increase in the load current of the original module, resulting in an increase in the power supply of the receiving module and insufficient power supply, it is very likely that the model of the RC model enthusiast will be out of control. The out-of-control phenomenon will bring fatal damage to the model itself; moreover, the modules on the market only use one channel switch for multiple times to realize the lighting and flickering of multiple channels and different LED light-emitting diodes. Although its functions are very powerful on the surface, it seems too complicated. For model lovers who love night flights, in addition to keeping a clear mind and seeing the position, attitude and next route of the model, they also need to consider how to adjust " "Navigation Lights" seems too cumbersome.

Contents of the invention

The technical problem to be solved by the utility model is: for the RC model, how to increase the number, brightness or power of the LED without causing the receiver to lose control due to insufficient power supply, and how to make its operation simple and clear.

The technical scheme adopted in the utility model is: a wireless control system for RC model LED lamp belts, including a single-chip microcomputer, a power supply circuit, a reset circuit crystal oscillator circuit, a programming port, and an LED switch circuit. One end of the power supply circuit is connected to the power supply, and the power supply The anode is electrically connected to the input terminal of the 7805 through four series diodes, the output terminal of the 7805 is connected to the VCC of the single-chip microcomputer, and the output terminal of the 7805 is shared with the 7805 through a 0.1uF capacitor; the INT0 and INT1 interrupt ports of the single-chip microcomputer are responsible for introducing PWM signals , PA0, PB1, and PB2 of the microcontroller are respectively connected to three identical LED switch circuits; the LED switch circuit includes a triode and a field effect tube, the base of the triode is connected to the microcontroller through a series resistor, and the collector of the triode is connected to the power supply through a The series resistor R3 is connected, the emitter of the triode is grounded, the G pole of the field effect tube is connected to the collector of the triode, the S pole of the field effect tube is grounded, and the two ends of the LED strip are respectively connected to the power supply and the D pole of the field effect tube. The terminals marked with SCK, MOSI, MISO, VCC, GND, and RESET on the recording port are electrically connected to the interfaces SCK, MOSI, MISO, VCC+AVCC, GND, and RESET in the microcontroller respectively. The reset circuit includes a SW switch, a 1N4148 diode, a current-limiting resistor R1, and a 0.1uF capacitor. The reset circuit is connected to the reset of the single-chip microcomputer; the crystal oscillator circuit means that the X1 and X2 terminals of the single-chip microcomputer are connected to an 8M crystal oscillator, and the two ends of the crystal oscillator are connected to 22pF Capacitor and ground to form a crystal oscillator circuit.

In this system, the receiver is only responsible for outputting the PWM signal used to control the LED light strip, and the operation of the module and the power source of the LED are taken from the power lithium battery of the RC model itself, and the system power supply is connected by 4 pin headers. It ensures that any power lithium battery greater than 12.6V can only provide 3S (12.6V) voltage for the module through its charging port, ensuring its wide applicability without the need for additional power supply. Therefore, no matter how large the LED load is Does not affect overloading of receiver modules. The control of LED adopts the method of controlling 3 LED strips by 2 channels, one of which can realize the constant on, constant off and alternate flashing of 2 LEDs, and the other channel can realize constant on, constant off and flashing. When the two channels are adjusted to the flashing interval at the same time, the alternate flashing of 3 LEDs can be realized, and a specific channel can only be turned on, off or flashing corresponding to a specific LED line. By omitting some unnecessary functions, simple control can be realized. idea. Finally, the programming port of the single-chip microcomputer is specially designed in the module, so that some high-end model enthusiasts can freely modify the action requirements of the LED light strip according to their specific needs.

The beneficial effects of the utility model are: without providing additional equipment such as power supply, the safety index and operability of the RC model night flight driving are improved, and the LED light strips of more than 2 meters can be lit with high brightness ), fool-like operation requirements, and the addition of the programming port also allows itself a wider expansion space. And it is small in size (3×4.8cm) and light in weight, which is very convenient for installation and portability.

Description of drawings

Fig. 1 is the overall schematic diagram of circuit design of the present utility model;

Fig. 2 is the circuit schematic diagram of the utility model LED switch circuit;

Fig. 3 is a schematic diagram of the programming interface of the utility model.

Detailed ways

As shown in Figure 1: ATMEGA16A AVR MCU is used; 10k is the current limiting resistor; four 1N4007 diodes can not only prevent the reverse connection of the power supply, but also reduce the voltage to a certain extent. A single reduction of 0.7V can play a role Reduce the heating effect of 7805; the 0.1uF capacitor connected to 7805 can increase the stability of 7805 output current, which is conducive to the normal operation of the single-chip microcomputer; 1N4148 diode, 0.1uF capacitor and SW switch are connected with the reset of the single-chip microcomputer to form a reset circuit; two 22pF Capacitor and 8M crystal oscillator constitute the crystal oscillator circuit of the single chip microcomputer; INT0 and INT1 are responsible for receiving the PWM signal output by the receiver in the RC model, which are two channels; by identifying the rising edge, falling edge, and duty cycle of different PWM signals, judge each The position of the channel switch, and output different high and low levels on PB1, PB2, and PA0 respectively, and the output high and low levels respectively enter three identical LED switch circuits as shown in Figure 2.

As shown in Figure 2: the base of the 9013 triode is connected to a 10k resistor, which is responsible for receiving high and low levels from the microcontroller, the collector is connected to another 10k resistor to a 12V power supply, and the emitter is grounded; the field effect transistor A03400 (N-channel enhanced Type MOS tube), the G pole is connected to the collector of 9013, the S pole is grounded, and the D pole is connected to the LED load and connected to the 12V power supply. When the base of the 9013 triode inputs a 5V high level, the 9013 triode is turned on, and the voltage of the G pole of the field effect transistor AO3400 is almost 0, the right end of the AO3400 is broken, and the LED diode light strip goes out; when the 9013 base inputs a 0V low level, the triode If the right end is disconnected, the G pole of AO3400 is connected to 12V voltage, the right end is in the conduction state, and the LED diode light strip is lit.

The whole circuit receives and recognizes the PWM signals sent by the two channel lines through the single-chip microcomputer, and realizes the opening and closing of the three LED lines.

As shown in Figure 3, the programming port, where SCK, MOSI, MISO, VCC, GND, and RESET correspond to the interfaces SCK, MOSI, MISO, VCC+AVCC, GND, and RESET in the single-chip microcomputer in Figure 1, respectively, the addition of the programming port The expansion of the program and the wide application of the modules have been realized.

After testing, the current of an ordinary 1-meter 12-volt LED strip (0.7A) is less than 1A, and the A03400 can pass a current of 4.9A at 70°C, that is, the 3-way interfaces in the module can realize the operation of larger LED lines. If you replace it with other models The advanced N-channel enhanced MOS tube can still realize the wireless control of more powerful LED strips.

Claims (1)

1. RC model LED lamp band wireless control system, it is characterized in that: comprise single-chip microcomputer, power circuit, reset circuit, crystal oscillating circuit, burning mouth and LED switching circuit, one termination power of power circuit, the diode of the positive pole of power supply by four series connection is electrically connected with 7805 input, 7805 output meets the VCC of single-chip microcomputer, and the output 7805 by a 0.1uF electric capacity and 7805 altogether; Fracture is responsible for introducing pwm signal among the INT0 of single-chip microcomputer and the INT1, and the PA0 of single-chip microcomputer, PB1, PB2 connect respectively 3 identical LED switching circuits; The LED switching circuit comprises a triode and field effect transistor, the base stage of this triode is connected with single-chip microcomputer by a series resistance, the collector electrode of triode is connected by a series resistance R3 with power supply, the grounded emitter of triode, the G utmost point of field effect transistor is connected with the collector electrode of triode, the S utmost point ground connection of field effect transistor, LED lamp band two ends connect respectively the D utmost point of power supply and field effect transistor.

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