Wireless radio frequency signal transmission and control circuit

Abstract

The utility model discloses a wireless radio frequency signal transmission and control circuit, which comprises a radio frequency emission chip U2, a patch crystal oscillator Y1, an antenna pedestal JP3, a single chip microcomputer U4, a program burning seat J5, a dial switch J0 and a single chip microcomputer U1, a capacitor C28 is bridged between the patch crystal oscillator Y1 and the radio frequency emission chip U2, the patch crystal oscillator Y1 is connected with a capacitor C29, an inductor L4 and a capacitor C18 in series and then is grounded, and the antenna pedestal JP3 is connected with the single chip microcomputer U1. The radio frequency emission chip U2 is externally connected with a power supply through a resistor R1. According to the utility model, the single-chip microcomputer U1 scans the button condition, data is packaged according to a fixed coding mode and is sent to the single-chip microcomputer U4, and the single-chip microcomputer U4 obtains a communication channel by scanning the corresponding position of the dial switch J0. Then data sent by the single chip microcomputer U1 are converted into corresponding frequency according to a channel value corresponding to the dial switch J0 to be sent to the radio frequency sending chip U2, and the radio frequency sending chip U2 modulates the data through FSK according to a frequency value of a specified channel and then sends the data.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless radio frequency signal transmission and control, in particular to a wireless radio frequency signal transmission and control circuit. Background Art

[0002] Traditional remote controls are modified by replacing crystal oscillators of different frequencies or by using dedicated equipment to adjust channels, which is inconvenient and cannot adapt to different application environments. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a wireless radio frequency signal sending and control circuit to solve the technical problem in the prior art that "traditional remote controls are inconvenient because they cannot adapt to different application environments by replacing crystal oscillators of different frequencies or by using special equipment to modify and adjust channels."

[0004] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A wireless radio frequency signal transmission and control circuit, comprising a radio frequency transmitting chip U2, a surface mount crystal oscillator Y1, an antenna seat JP3, a single chip microcomputer U4, a program burning seat J5, a code switch J0, and a single chip microcomputer U1. A capacitor C28 is connected between the surface mount crystal oscillator Y1 and the radio frequency transmitting chip U2. The surface mount crystal oscillator Y1 is connected in series with a capacitor C29, an inductor L4, and a capacitor C18 and then grounded. The radio frequency transmitting chip U2 is externally connected to a power supply through a resistor R1. The antenna seat is connected in series with capacitors C21, C23, and an inductor L5 and then grounded. The capacitor C23 and the inductor L5 are connected in series. Then it is connected in parallel with the series circuit of inductors L1, L2, L3 and capacitors C19. The RF transmitting chip U2 is connected to the single-chip microcomputer U4 through resistors R20 and R21 respectively. The single-chip microcomputer U4 is externally connected to a program burning socket J5. The single-chip microcomputer U4 is connected to the single-chip microcomputer U1 through two pins, one of which is connected to the single-chip microcomputer U1 through a resistor R22, and the other pin is connected in series with a resistor R16, a capacitor C24 and a resistor R15 and then connected to the single-chip microcomputer U1. The single-chip microcomputer U1 is externally connected to an external crystal oscillator XTAL1 and is grounded through a capacitor C13.

[0006] As a preferred technical solution of the present utility model, multiple interfaces of the single-chip microcomputer U1 are respectively connected to communication interfaces and key switches.

[0007] As a preferred technical solution of the utility model, the DIP switch J0, the single-chip microcomputer U4, the program burning socket J5, and the single-chip microcomputer U1 are respectively connected to an external power supply voltage source through a resistor R22, a capacitor C25, and a resistor R19.

[0008] The utility model provides a wireless radio frequency signal transmission and control circuit, which has the following beneficial effects:

[0009] 1. The utility model uses the single-chip microcomputer U1 to scan the key status, packs the data according to the fixed coding method and sends it to the single-chip microcomputer U4. The single-chip microcomputer U4 obtains the communication channel by scanning the corresponding position of the code switch J0. Then the data sent by the single-chip microcomputer U1 is converted into the corresponding frequency according to the channel value corresponding to the code switch J0 and sent to the RF transmitting chip U2. The RF chip U2 modulates the data through FSK according to the frequency value of the specified channel and sends it out;

[0010] 2. The solution uses the dip switch J0 to adjust the channel. If there is co-frequency interference on site, it can be quickly changed to an interference-free channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the circuit structure proposed by the utility model. DETAILED DESCRIPTION

[0012] The following is a further detailed description of the implementation mode of the utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0013] Example

[0014] refer to Figure 1A wireless radio frequency signal transmission and control circuit comprises a radio frequency transmitting chip U2, a surface mount crystal oscillator Y1, an antenna seat JP3, a single chip microcomputer U4, a program burning seat J5, a code switch J0, and a single chip microcomputer U1. A capacitor C28 is connected between the surface mount crystal oscillator Y1 and the radio frequency transmitting chip U2. The surface mount crystal oscillator Y1 is connected in series with a capacitor C29, an inductor L4, and a capacitor C18 and then grounded. The radio frequency transmitting chip U2 is externally connected to a power supply through a resistor R1. The antenna seat is connected in series with capacitors C21, C23, and an inductor L5 and then grounded. The capacitor C23 and the inductor L5 are connected in series. After being connected, it is connected in parallel with the series circuit of inductors L1, L2, L3 and capacitors C19. The RF transmitting chip U2 is connected to the single-chip microcomputer U4 through resistors R20 and R21 respectively. The single-chip microcomputer U4 is externally connected to a program burning socket J5. The single-chip microcomputer U4 is connected to the single-chip microcomputer U1 through two pins, one of which is connected to the single-chip microcomputer U1 through a resistor R22, and the other pin is connected in series with a resistor R16, a capacitor C24 and a resistor R15 and then connected to the single-chip microcomputer U1. The single-chip microcomputer U1 is externally connected to an external crystal oscillator XTAL1 and is grounded through a capacitor C13.

[0015] Among them, multiple interfaces of the single-chip computer U1 are respectively connected to the communication interface and the key switch. The communication interface can communicate with the host computer to facilitate the adjustment of different parameters. The key switches include: start key, stop key, action one, action two, action three, action four, action five, action six, which are used to send different command signals.

[0016] The DIP switch J0, the single-chip microcomputer U4, the program burning socket J5, and the single-chip microcomputer U1 are respectively connected to an external power supply voltage source through a resistor R22, a capacitor C25, and a resistor R19.

[0017] Among them, the single-chip microcomputer U1 scans the button status, packages the data in a fixed coding method and sends it to the single-chip microcomputer. The single-chip microcomputer obtains the communication channel by scanning the corresponding position of the dip switch J0. Then the data sent by the single-chip microcomputer U1 is converted into the corresponding frequency according to the channel value corresponding to the dip switch J0 and sent to the RF transmitting chip U2. The RF chip sends the data through FSK modulation according to the frequency value of the specified channel.

[0018] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and utility model concept of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

Claims

1. A wireless radio frequency signal transmission and control circuit, including a radio frequency transmitting chip U2, a surface mount crystal oscillator Y1, an antenna base JP3, a single chip microcomputer U4, a program burning base J5, a dip switch J0, and a single chip microcomputer U1, characterized in that: A capacitor C28 is connected between the SMD crystal oscillator Y1 and the RF transmitting chip U2. The SMD crystal oscillator Y1 is connected in series with a capacitor C29, an inductor L4, and a capacitor C18 and then grounded. The RF transmitting chip U2 is externally connected to a power supply through a resistor R1. The antenna base is connected in series with capacitors C21, C23, and an inductor L5 and then grounded. The capacitor C23 and the inductor L5 are connected in series and then connected in parallel with the series circuit of the inductors L1, L2, L3, and the capacitor C19. The RF transmitting chip U2 is connected to the single-chip computer U4 through resistors R20 and R21, respectively. The single-chip microcomputer U4 is externally connected to a program burning socket J5, and the single-chip microcomputer U4 is connected to the single-chip microcomputer U1 through two pins, one of which is connected to the single-chip microcomputer U1 through a resistor R22, and the other pin is connected to the single-chip microcomputer U1 after being connected in series with a resistor R16, a capacitor C24, and a resistor R15. The single-chip microcomputer U1 is externally connected to an external crystal oscillator XTAL1 and is grounded through a capacitor C13.

2. A wireless radio frequency signal transmission and control circuit according to claim 1, characterized in that: The multiple interfaces of the single chip microcomputer U1 are respectively connected to the communication interface and the key switch.

3. A wireless radio frequency signal transmission and control circuit according to claim 1, characterized in that: The DIP switch J0, the single-chip microcomputer U4, the program burning socket J5, and the single-chip microcomputer U1 are respectively connected to an external power supply voltage source through a resistor R22, a capacitor C25, and a resistor R19.

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