Control circuit for music effect control device and systems using same
Provided are a control circuit for a music effect control device and systems using the same. The control circuit comprises multiple audio input interfaces and can be connected to audio devices in different forms to acquire audio information, the acquired audio information is converted into digital signals by a processing chip U 1 to control a control device, and the control device can control an output from an energy device to an effect device to indirectly change the power of the effect device, so the effect produced by the effect device can change correspondingly with the rhythm of an audio, thus presenting various music effects.
1 . A control circuit for a music effect control device, being applied to a system formed by multiple groups of audio control devices, the system comprising an energy device, a control device and an effect device, and the energy device being connected to the effect device through the control device and configured to supply energy to the effect device, wherein the control circuit comprises an audio input module, a main control module, a control module and a power supply; wherein the audio input module, the control module and the power supply are all electrically connected to the main control module;
the audio input module is configured to acquire audio signals and transmit the acquired audio signals to the main control module;
the main control module is configured to convert the acquired audio signals into PWM digital signals and transmit the digital signals to the control module;
the control module is configured to receive the digital signals transmitted from the main control module, generate corresponding control signals according to the PWM digital signals and send the control signals to the control device, and the control device changes an output of the energy supplied by the energy device to the effect device according to the control signals to indirectly control operating power of the effect device to realize different display effects of the effect device; and
the power supply is configured to supply power to the main control module;
wherein the main control module comprises an audio DSP+MCU chip, a wireless output module, and an audio output interface; wherein the wireless output module and the audio output interface are both electrically connected to the audio DSP+MCU chip, wherein the audio input module is configured to send the audio signals to the audio DSP+MCU chip, and wherein an algorithm in the audio DSP+MCU chip is configured to generate the corresponding PWM digital signals based on the acquired audio signals and send the PWM digital signals to the control module; and wherein the audio DSP+MCU chip is configured to synchronously send the acquired audio signals to the wireless output module and the audio output interface;
wherein the control module comprises a plurality of control sub-circuits respectively connected to different control devices, wherein a field effect transistor and a 2PIN interface are arranged in each of the plurality of control sub-circuits, wherein a gate of the field effect transistor is connected to the main control module, wherein an internal resistance of the field effect transistor is operative to be controlled according to the PWM digital signals from the main control module to control an internal operating current of the field effect transistor, wherein a drain of the field effect transistor is connected to one end of the 2PIN interface, the other end of the 2PIN interface is connected to a 12V power interface of the main control module, and wherein the control device is connected to the 2PIN interface, and wherein a source of the field effect transistor is grounded;
wherein each of the plurality of control sub-circuits is provided with a protection branch circuit, comprising a protection diode and a high-frequency absorption capacitor and configured to eliminate a counter self-induced electromotive force and high-frequency pulses generated when the control device is short-circuited suddenly, wherein the protection diode and the high-frequency absorption capacitor are connected in parallel with the 2PIN interface, and wherein a positive pole of the protection diode is connected to the drain of the field effect transistor;
wherein the audio input module comprises at least one selected from the group consisting of a USB input interface, a fiber input interface, an analog audio input interface, a microphone input interface, a coaxial input interface, and a short-range wireless communication receiver, wherein all the interfaces and the short-range wireless communication receiver are electrically connected to the main control module and configured to acquire the audio signals in different formats and transmit the audio signals to the main control module, and wherein the main control module is configured to generate the corresponding PWM digital signals according to the acquired audio signals.
2 . The control circuit for a music effect control device according to claim 1 , wherein the main control module further comprises a key functional circuit formed by a voltage dividing resistor and a key switch which are connected in series, multiple said key functional circuits are connected in parallel to form a key functional circuit group, and the voltage dividing resistors in the key functional circuits have different resistances; the audio DSP+MCU chip is connected to one end of the key functional circuit and sends a current signal to the key functional circuit group, then the current signal returns to the audio DSP+MCU chip, and the other end of the key functional circuit is grounded; and when one said key switch in the key functional circuit group is pressed to turn on the circuit, the voltage dividing resistors will take away part of voltage and lead to a change of a feedback signal fed back to the audio DSP+MCU chip, and the audio DSP+MCU chip changes a control mode of a display control circuit according to different feedback signals.
3 . The control circuit for a music effect control device according to claim 1 , wherein the main control module further comprises a display circuit formed by multiple light-emitting diodes which are connected in parallel, each of the multiple light-emitting diodes has an end connected to a current input terminal of a control circuit, as well as an end grounded, the light-emitting diodes are different in color, and when the audio DSP+MCU chip turns on one said control sub-circuit, the light-emitting diode in one color will be turned on.
4 . A music effect control system, using the control circuit for a music effect control device according to claim 1 , wherein the music effect control system comprises multiple effect groups each formed by an energy device, an audio control device, a control device and an effect device, the energy device is connected to the effect device through the control device, the audio control device is electrically connected to the control device, the energy device is configured to supply energy to the effect device, the audio control device is configured to acquire audio signals and send corresponding control signals to the control device according to the acquired audio signals, and the control device is configured to change an output of the energy supplied by the energy device to the effect device.
5 . A music effect control system, using the control circuit for a music effect control device according to claim 1 , wherein the music effect control system comprises multiple effect groups each formed by an energy device and an effect device, and the energy device is connected to the effect device and configured to supply energy when the effect device operates.
6 . The music effect control system according to claim 5 , wherein an effect generator, a control device and an audio control device are arranged in the effect device, the energy device is connected to the effect generator through the control device, the audio control device is electrically connected to the control device and configured to acquire audio signals and send corresponding control signals to the control device according to the acquired audio signals, and the control device is configured to change an output of energy supplied by the energy device to the effect generator to indirectly change operating power of the effect generator to generate multiple music effects.