Bluetooth sound equipment soft starting circuit with reset function
By designing reset buttons and related circuit components in the Bluetooth audio soft power-on circuit, the power-on, shutdown and reset functions are realized, solving the problem of lack of reset functions in the existing technology, reducing costs and maintaining product aesthetics.
Patent Information
- Application Number
- CN202421276488.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The existing Bluetooth audio soft power-on circuit lacks reset function, and it is time-consuming to disassemble and can easily cause secondary damage. At the same time, adding external power switches will increase costs and affect aesthetics.
Design a Bluetooth audio soft power-on circuit with reset function, and realizes power-on, shutdown and reset functions through components such as reset buttons, power-on buttons, transistors and MOS tubes. The built-in touch buttons are used, which are low in cost and have little impact on appearance.
The reset function of Bluetooth speakers is realized, reducing the risk and cost of dismantling the machine, while maintaining the aesthetics of the product.
Smart Images
Figure CN222621008U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a startup circuit, in particular to a Bluetooth audio soft startup circuit with a reset function. Background Art
[0002] If the soft-start speaker does not have a reset function, disassembly is time-consuming and may cause secondary damage. After disassembly, the speaker is prone to air leakage, which greatly reduces the listening experience. If the soft-start speaker needs to achieve a reset function, an external power switch can be added, but this will increase the cost and affect the appearance. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide a Bluetooth audio soft start circuit with a reset function, which has low cost and little impact on the appearance of the product.
[0004] In order to solve the above technical problems, the technical solution of the utility model is: a Bluetooth audio soft start circuit with a reset function, a reset button RESET, a power button POWER, a transistor Q1, a transistor Q2 and a MOS tube Q3; the power supply is connected to the base of the transistor Q1 through the power button POWER, and the power supply is connected to the base of the transistor Q2 through the power button POWER and the diode D1 in turn, the emitter of the transistor Q1 is grounded, the base of the transistor Q2 is grounded through the reset button RESET, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the gate of the MOS tube Q3, the source of the MOS tube Q3 is connected to the power supply, the drain of the MOS tube Q3 is respectively connected to +VCC and the capacitor C25 through two parallel diodes D3 and D4, the collector of the transistor Q1 is connected to the single-chip microcomputer MCU, and the single-chip microcomputer MCU is connected to the base of the transistor Q2 through the diode D2. Principle of the utility model: Power on: long press the power button POWER, the transistor Q2 is turned on, the MOS tube Q3 is turned on, the transistor Q1 is turned on, the collector PWR_KEY of the transistor Q1 outputs a low level to the single-chip microcomputer MCU, the switch signal ON / OFF of the single-chip microcomputer MCU outputs a high level, the transistor Q3 is turned on, and the power on is achieved; Power off: long press the power button POWER, the transistor Q2 is turned on, the MOS tube Q3 is turned on, the transistor Q1 is turned on, the collector PWR_KEY of the transistor Q1 outputs a low level to the single-chip microcomputer MCU, the switch signal ON / OFF of the single-chip microcomputer MCU outputs a low level, the MOS tube Q3 is turned off, and the power off is achieved; Reset: in the dead state, long press the reset button RESET, the transistor Q2 is turned off, the MOS tube Q3 is turned off, the whole machine is forcibly stopped from supplying power, and reset is achieved.
[0005] As an improvement, the model of the single-chip microcomputer MCU is BP1048B2, the collector of the transistor Q1 is connected to the 35th pin of the single-chip microcomputer MCU, and the 32nd pin of the single-chip microcomputer MCU is connected to the base of the transistor Q2 through the diode D2.
[0006] Compared with the prior art, the utility model has the following beneficial effects:
[0007] The built-in light-touch button is used to turn the machine on and off and reset, which is low-cost and only has a small hole on the appearance, with little impact on the appearance of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is the circuit schematic diagram of the utility model.
[0009] Figure 2 This is the pin diagram of the microcontroller MCU. DETAILED DESCRIPTION
[0010] The utility model will be further described below in conjunction with the accompanying drawings.
[0011] like Figure 1 As shown, a Bluetooth audio soft start circuit with a reset function comprises a reset button RESET, a power button POWER, a transistor Q1, a transistor Q2 and a MOS tube Q3; the power supply +22.5V is connected to the base of the transistor Q1 after passing through the power button POWER and a resistor R36 in sequence, the power supply +22.5V is connected to the base of the transistor Q2 after passing through the power button POWER, a diode D1, a resistor R34 and a resistor R37 in sequence, the emitter of the transistor Q1 is grounded, and the power supply +22.5V is connected to the base of the transistor Q2 after passing through the power button POWER, a diode D1, a resistor R34 and a resistor R37 in sequence, the emitter of the transistor Q1 is grounded, and the power supply +22.5V is connected to the base of the transistor Q2 after passing through the diode D1, a resistor R34 and a resistor R37 in sequence. The resistor R33 is grounded, the resistors R34 and R37 are grounded through the resistor R38, the base of the transistor Q2 is grounded through the reset button RESET, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the gate of the MOS transistor Q3 through the resistor R39, the source of the MOS transistor Q3 is connected to the power supply +22.5V, the drain of the MOS transistor Q3 is connected to +VCC and the capacitor C25 respectively through two parallel diodes D3 and D4, and the negative electrode of the capacitor C25 is grounded; Figure 2 As shown, the model of the single-chip microcomputer MCU is BP1048B2, the collector of the transistor Q1 is connected to the 35th pin PWR_KEY of the single-chip microcomputer MCU through the resistor R31, and the 32nd pin ON / OFF of the single-chip microcomputer MCU is connected to the base of the transistor Q2 through the resistor R32, the diode D2, and the resistor R37 in sequence.
[0012] Principle of the utility model: Power on: long press the power button POWER, the transistor Q2 is turned on, the MOS tube Q3 is turned on, the transistor Q1 is turned on, the collector PWR_KEY of the transistor Q1 outputs a low level to the single-chip microcomputer MCU, the switch signal ON / OFF of the single-chip microcomputer MCU outputs a high level, the transistor Q3 is turned on, and the power on is achieved; Power off: long press the power button POWER, the transistor Q2 is turned on, the MOS tube Q3 is turned on, the transistor Q1 is turned on, the collector PWR_KEY of the transistor Q1 outputs a low level to the single-chip microcomputer MCU, the switch signal ON / OFF of the single-chip microcomputer MCU outputs a low level, the MOS tube Q3 is turned off, and the power off is achieved; Reset: in the dead state, long press the reset button RESET, the transistor Q2 is turned off, the MOS tube Q3 is turned off, the whole machine is forcibly stopped from supplying power, and reset is achieved.
Claims
1. A Bluetooth audio soft start circuit with reset function, characterized in that: Reset button RESET, power button POWER, transistor Q1, transistor Q2 and MOS tube Q3; the power supply is connected to the base of the transistor Q1 through the power button POWER, and the power supply is connected to the base of the transistor Q2 through the power button POWER and the diode D1 in turn, the emitter of the transistor Q1 is grounded, the base of the transistor Q2 is grounded through the reset button RESET, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the gate of the MOS tube Q3, the source of the MOS tube Q3 is connected to the power supply, the drain of the MOS tube Q3 is respectively connected to +VCC and the capacitor C25 through two parallel diodes D3 and D4, the collector of the transistor Q1 is connected to the single-chip computer MCU, and the single-chip computer MCU is connected to the base of the transistor Q2 through the diode D2.
2. The Bluetooth audio soft start circuit with reset function according to claim 1, characterized in that: The model of the single-chip microcomputer MCU is BP1048B2, the collector of the transistor Q1 is connected to the 35th pin of the single-chip microcomputer MCU, and the 32nd pin of the single-chip microcomputer MCU is connected to the base of the transistor Q2 through the diode D2.