RBACC Passive buzzer module for arduino

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SKU KY0006
Weight 0.00 / KG(Kilogram)

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A)Principle structure buzzer
Introduction (a) the buzzer
1. Buzzer: The buzzer is an integrated electronic structure of Xiangqi, DC power supply, widely used in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephones, timers, etc. electronic products for sound devices.
2. Buzzer Category: mainly divided piezoelectric buzzer and two types of electromagnetic buzzer.
3. Buzzer circuit graphic symbols: the buzzer in the circuit by the letter "H" or "HA" (the old standard with "FM", "LB", "JD", etc.) representation.
B)Schematic buzzer
Principle structure (two) buzzer
1. Piezo Buzzer: Piezo buzzer mainly by multi-harmonic oscillator, piezoelectric buzzer, impedance matching and resonance box, casing and other components. Some of the piezoelectric buzzer shell is also equipped with light-emitting diodes.
Multivibrator constituted by transistors or integrated circuits. When the power is turned on (1.5V-15V DC working voltage), multi-harmonic oscillator start-up, 1.5-2.5kHZ output audio signal, the impedance matching is pushing piezoelectric buzzer sound.
Piezoelectric buzzer made from lead zirconate titanate or lead magnesium niobate piezoelectric ceramic material. Both sides of the ceramic plate plated silver electrode by polarization and aging treatment, and then glued together with brass or stainless steel sheet.
2. Magnetic Buzzer: magnetic buzzer by the oscillator, the electromagnetic coils, magnets, diaphragm and housing and other components.
After power on, the audio signal generated by the oscillator current through the solenoid coil, the electromagnetic coil generates a magnetic field. In the diaphragm and the magnet interaction between the electromagnetic coil periodically vibrating sound.
C) making the buzzer
(1) Preparation of electromagnets M: about 6 cm in the iron wire coil 100 around the bolt, leaving 5 cm terminals for leads, good transparent sticky tape to the coil, so as to release the coil, then the tape to stick it on a box, solenoid on the well.
(2) Preparation of shrapnel P: Cut from the iron cans a width of 2 cm long iron, bent at right angles to one lead connected to the electromagnet shrapnel, and then tape the shrapnel close to the board.
(3) to make contact with the paper clip Q, books elevate the clip, with taped leads to a wire, as shown in the circuit connected.
(4) adjust the distance between M and P (by moving the box), so that the electromagnet to attract shrapnel, adjust the distance between the contacts and the shrapnel so that they can just contact with energized after the beep can be heard.
(D) the active and passive buzzer buzzer
Teach you to distinguish between active and passive buzzer buzzer
Now a small buzzer on the market because of its small size (diameter of only llmm), light weight, low price, solid structure, and is widely used in a variety of needs audible electrical equipment, electronic production and microcontroller circuits, etc.
From the exterior, two kinds of buzzer seems the same, but a closer look, a slight difference between the height of the active buzzer a, height of 9mm, and passive buzzer b height of 8mm. When the buzzer as the two pins are facing up, you can see there is a green circuit board is passive buzzer, no closed circuit boards with a vinyl is active buzzer .
Step to determine the active and passive buzzer buzzer, you can also use a multimeter to test the resistance profile Rxl file: black pen then the buzzer with "+" pin, the red pen to touch on another pin back and forth, if trigger a cracking, cracking sound and the resistance only 8Ω (or 16Ω) is passive buzzer; If you can emit continuous sound, and the resistance in Europe and more than a few hundred, and is an active buzzer.
Active buzzer directly connected to the rated power (new buzzer has stated on the label) can be a continuous sound; rather passive electromagnetic buzzer and speaker are the same, you need to take in order to sound the audio output circuit .
Color: Black
Working voltage:3.5-5.5V
Working current:<25mA
Active Speaker
Application: For PC, printer, car audio system DIY
Material: PCB + Brass
Dimensions: 25 x 16 x 11 mm / 0.98 x 0.63 x 0.43 inch
Weight: 3 g / 0.11 oz


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