Active buzzer module low level trigger buzzer control board

Active buzzer module low level trigger buzzer control board Product parameters Working voltage: 3.3V-5V Small board PCB size: 3.3cm * 1.3cm Product Instructions VCC external 3.3V-5V voltage (can be directly connected with 5V MCU and 3.3V MCU) Connected), GND external drive system GND, I/0 external microcontroller I0 pin or other Audio driver source, connect low level to make it sound. Precautions The "source" here does not refer to the power supply. But refers to the oscillation source. The active buzzer has a simple oscillating circuit inside, which can convert constant direct current into a Fixed frequency pulse signal, program control is convenient but the frequency is fixed, single chip microcomputer a high and low level You can make it sound. Like the electromagnetic speaker, the passive buzzer has no internal driver circuit and needs to be connected to the audio output power. The sound can only be made in the road. If the DC signal is given, it will not ring, because the magnetic circuit is constant, 2K~ 5K must be used. The square wave of to drive it. The sound frequency is controllable, and it can make the effect of "more Mifa Solasi". In some special cases, a control port can be multiplexed with the LED. ตัวอย่างวิธีใช้งาน Active Buzzer Module 3.3 - 5V /* Active Buzzer -- UNO R3 VCC - 3.3-5V Gnd- Gnd I/O - 13 */ int buzzer = 13; void setup() { pinMode(buzzer, OUTPUT); } void loop() { digitalWrite(buzzer, HIGH); delay(1000); digitalWrite(buzzer, LOW); delay(1000); }