Skip to main content
Electrical Engineering

Questions tagged [buzzer]

Ask Question

A buzzer is an audio signaling device, usually piezo-electric.

54 questions
Newest Active Bountied Unanswered
Filter by
Sorted by
Tagged with
2 votes
2 answers
106 views

Is this a passive buzzer? It's marked "AC". I need to replace it and cannot find any info, such as its operating voltage.
DarylDaryl's user avatar
  • 21
-1 votes
1 answer
123 views

I have a active buzzer and a PIR motion sensor and an Arduino board. While I try to achieve, when there is motion then a buzzer to make the beep sound and between each motion to be a delay. But the ...
Alsiro Mira's user avatar
  • 1
0 votes
3 answers
66 views

I'm stuck with simple AST0940MCQ, I'm not able to get any sound from it, here is my sch R41 is connected to MCU where I generate a PWM signal 4kHz, check with my oscillo pwm is fine. If I check ...
simon's user avatar
  • 111
0 votes
1 answer
113 views

I wanted to create a similar sound to a commercially available bicycle buzzer, so I built a circuit using a 555 timer, as shown below. I also used a disassembled bicycle buzzer and a booster inductor ...
little_android's user avatar
  • 533
2 votes
1 answer
653 views

The photo above is a loud bicycle buzzer sold on AliExpress and its circuit diagram. The actual product and circuit are different, but similar. When I disassembled the product and measured the battery ...
little_android's user avatar
  • 533
1 vote
1 answer
76 views

I am using a MQ6 gas sensor and ESP32 dev board. The intent of this circuit is to have gas sensor sense the gas leakage and inform ESP32 to take further action. Following is how, I am connecting the ...
anuraag's user avatar
  • 21
4 votes
2 answers
393 views

I usually drive a piezo buzzer with the common driving circuit: a MOS (or NPN) and a resistor across the buzzer (between VCC and drain). The gate is driven by a MCU with a square wave. The pressure ...
mtx4's user avatar
  • 171
2 votes
3 answers
165 views

I bought a ceramic buzzer like the picture. And I tried to use it with the circuit below, but it doesn't work. The above circuit works well for a normal buzzer. I tried using it in an active mode by ...
little_android's user avatar
  • 533
2 votes
0 answers
63 views

I have a mint condition Polish DP-75 Geiger Counter. It is 40 years old but it has been well maintained and works good as new. It has a mono headphone output to a Soviet type Tonsil SM-73 earplug, ...
Mátyás Csikós's user avatar
  • 21
1 vote
3 answers
154 views

https://www.eleccircuit.com/four-light-sensor-alarm-circuits/ This is the link to the website where the circuit is explained. I have some trouble understanding this circuit, or more precisely, ...
Georgi Rumenov's user avatar
  • 13
5 votes
3 answers
519 views

I am designing a circuit for a magnetic transducer buzzer and this is the provided application schematic for the buzzer I am using (ST-025BH): The buzzers maximum mean current is 100mA, and with its ...
Ethan Silver's user avatar
  • 101
0 votes
1 answer
143 views

I need to design Buzzer circuit. While i searching for reference design in google i saw one design based on buzzer, Here they drive a buzzer by using MOSFET. Here My doubt is, they used R23 & R24 ...
Kuralmozhi's user avatar
  • 99
0 votes
1 answer
798 views

I'm working on a circuit that needs to trigger an alarm buzzer (external dry contact trigger). It should have a facility to mute the buzzer while the alarm is still on and turn it off when the ...
ralph's user avatar
  • 1
0 votes
1 answer
243 views

I'm making a project with an Arduino using an active buzzer 5v. I saw many forums with mixed comments about using an active buzzer straight to the I/O pins without any current limiting. Then I also ...
Kokachi's user avatar
  • 832
1 vote
1 answer
125 views

This is the control panel of laundry unit. The black plastic objects soldered to the board are buzzers right? Can I disconnect soldered legs via careful pliers? I don’t have a soldering iron. Only by ...
Gator's user avatar
  • 11
4 votes
5 answers
2k views

I'm trying to make my buzzer sound when hooked up to 12V and a MOSFET in between but I'm perfectly failing. I'm using GPIO15 of my ESP32 WROOM to send a PWM signal to the MOSFET but nothing really ...
Cyril Schmidiger's user avatar
  • 41
0 votes
1 answer
717 views

Edit: Realised Silly mistake, I have the emitter and collector swapped on my PCB :( sorry about that. I'm trying to control a magnetic buzzer indicator using an STM32 MCU. I have the circuit below ...
tagy22's user avatar
  • 67
0 votes
2 answers
377 views

I have a buzzer with: 8 ohm 1 watt rated power Resonant frequency: 700/600 Hz In order to make it sound, should I apply a PWM with 700/600 Hz, and turning ON and OFF? What is the maximum voltage? ...
da_bb's user avatar
  • 1
3 votes
0 answers
188 views

Below is the circuit where I want to integrate the buzzer with the red LED. The task is to add the buzzer, where the red LED is, in such a way that when the red LED (which is driven by the LED driver)...
Melvo's user avatar
  • 31
2 votes
1 answer
607 views

I am trying to establish if this buzzer circuit going to perform as expected MPU: STM32 running at 3.3V, input will be coming from a GPIO pin that has a timer channel on it Buzzer: A passive magnetic ...
Charles's user avatar
  • 157
1 vote
3 answers
720 views

I need a small package buzzer to replace the regular piezo buzzer which is too big for my design, so I tried the KLJ-5030. I tested by applying 3V to positive pin and GND to negative pin and heard a ...
Unicorn's user avatar
  • 213
0 votes
1 answer
246 views

How can I add a buzzer to my EverStart Digital Multimeter 10711WDI circuit board, so that it buzzes when there is continuity?
Aye kay's user avatar
  • 1
1 vote
1 answer
65 views

Does removing the buzzer chip from a PCB reduce the energy the PCB uses? Is it save to remove the buzzer? It's an FMQ.
Tobias Bättig's user avatar
  • 13
0 votes
1 answer
94 views

Does anyone know a basic circuit so I can have a switch which activates a buzzer and a LED strip run off a battery?
Emz's user avatar
  • 3
1 vote
1 answer
1k views

I'm looking to drive an active magnetic 3V buzzer with an ESP32 pin through an N-Channel MOSFET as follows: I'm not sure if the 100 Ohm resistor is needed and whether the value is correct. Buzzer ...
Maxim Kachurovskiy's user avatar
  • 171
2 votes
1 answer
316 views

I live in a condominium. There is a door intercom system (see picture 1). The intercom is made by BPT company (Italy), model E/272 (see diagram in picture 2). Since there is too much noise, I can't ...
NickRucunas's user avatar
  • 21
0 votes
1 answer
211 views

i'm making a fall prevent circuit and i want to make sure that this circuit is correct which i made I would like to check because I don't have enough budget and time to buy many other parts and this ...
KimJiHoon's user avatar
  • 67
0 votes
0 answers
75 views

I'm working on a device that uses an STM32L552ZET6Q, two DRV2605L motor drivers configured for LRA PWM output, and two BNO055 IMU units configured for IMUPLUS mode. Each of the four chips is connected ...
E.HP.S's user avatar
  • 369
2 votes
1 answer
973 views

Need to use an ESP32 to run a buzzer datasheet The source current maximum per pin of the esp32 is 20mA However I need to drive an active buzzer with 3V@30mA, so I decided to use an N-MOSFET (2N7002 ...
Eqkaier's user avatar
  • 31
1 vote
3 answers
259 views

I'm making AC detector using bjt amplifier below is my circuit. When it detects AC signal it will show result in LED and I want to add buzzer(3V) for show result in LED and buzzer ( 3V) so I ...
Heroz's user avatar
  • 433
0 votes
1 answer
134 views

I am trying to design a 12-people buzzer quiz game. I just want to use LEDs and AND and NOT gates, using one switch for reset. The problem is that after designing it all the odd LEDs or even LEDs ...
mia's user avatar
  • 13
1 vote
2 answers
441 views

If I connect this little mechanical buzzer to a 3V supply, then hold my AM radio close to it with the radio tuned so I can't hear any stations, I can hear the buzzer on the radio. If I turn up the ...
Annette Gates's user avatar
  • 761
0 votes
0 answers
406 views

It is a simple water level indicator using BC547 and a buzzer. It works on a 9v/12v battery. Its switch is placed beside the motor pump's switch. Whenever the motor switch is on there is a noise ...
Rafi Md.'s user avatar
  • 1
0 votes
3 answers
351 views

I have a set top box. It has a 3 mm green LED (on the front panel) that lights up when I connect the dish coax cable (signal LED). I measured the voltage across the LED. It has 0 V when the dish cable ...
user141178's user avatar
  • 11
1 vote
1 answer
163 views

On my boat I would like a warning buzzer to sound if the battery charger is on and the engine batteries are not isolated. Because if you start the engine with the battery charger on, the diodes in the ...
Lance Kneeshaw's user avatar
  • 65
4 votes
3 answers
3k views

I am a novice, and I'm playing around with SMD magnetic buzzers. For instance, the CUI CMT-322-65-SMT-TR. In the datasheet they recommend something like this: After some Googling I learnt the diode ...
peanutman's user avatar
  • 165
0 votes
1 answer
232 views

I have a project in my college that requires me to make an SOS (... --- ...) buzzer without any IC's, what are the possible components that I can use for the delay between the morse code signals? ...
HoleWizard's user avatar
  • 9
0 votes
1 answer
373 views

A quick note, I had asked a similar question around driving an external buzzer previously: Driving external piezo buzzers This is a question in regards to driving an internal buzzer, so not a ...
Hasman404's user avatar
  • 767
0 votes
2 answers
2k views

I am planning on using the following buzzer in my design ( SMACT-25-P15): https://uk.rs-online.com/web/p/piezo-buzzer-components/8055272/ It says it requires external circuitry for operation. I have ...
Hasman404's user avatar
  • 767
2 votes
1 answer
502 views

For a standard run-of-the mill piezo buzzer (as in the image below), what order of magnitude would the deformation be (compared to 0V) that occurs when driving it within its normal operating ...
Larsupial's user avatar
  • 39
6 votes
3 answers
2k views

I tried to make this circuit, but it didn't work like it should. I thought my connections were right but maybe it not. This is the circuit diagram: This is my layout. (I used other components as ...
Nurrrr's user avatar
  • 87
1 vote
2 answers
1k views

I want to construct this circuit because it look worth to try. However, I am not sure about connection between the components. This is the components placement that I tried, does it make sense? Please ...
Nurrrr's user avatar
  • 87
0 votes
1 answer
481 views

I am currently doing a project to light up a bulb and a buzzer at the same time. This circuit is an Arduino UNO which is connected to a relay to light up a bulb and the buzzer. Can a 40 watt bulb and ...
Steve Kush's user avatar
  • 3
1 vote
1 answer
325 views

I've found a usage of a buzzer with volume regulation that I hadn't seen before. Here's the schematic: Timers PWM are activated like this (Atmel MCU) : ...
Singed's user avatar
  • 459
1 vote
2 answers
286 views

Can someone explain the purpose of the C469 capacitor, which placed in parallel to collector and emitter of the transistor? Edit: Sorry for the mistake, C469 is parallel to CE
jackran's user avatar
  • 13
10 votes
2 answers
6k views

I have a small circuit working on 2xAA batteries (3V) with an MCU and a buzzer for alarm sound. I've already successfully used an active buzzer (with build-in driver oscillator) drived by an NPN ...
EttoreP's user avatar
  • 201
0 votes
2 answers
1k views

All I can find online are descriptions on how active buzzers have an oscillator built in so that you just need to feed them a DC and they buzz at the frequency set by such oscillator, but I haven't ...
palako's user avatar
  • 164
1 vote
1 answer
1k views

I've successfully created (and breadboarded) this circuit: simulate this circuit – Schematic created using CircuitLab I cannot figure out where to put a buzzer so that it goes off when the LED ...
wajmo's user avatar
  • 23
0 votes
1 answer
3k views

I am trying to simulate a mosquito repellent in Proteus v7.7. It uses an NE555 in astable mode. My problem is that I cannot hear the buzzer buzzing. I checked my circuit and everything seems correct ...
SWETHA CHILVERI's user avatar
  • 1
0 votes
1 answer
652 views

As a small buzzer to output simple audio, I am considering the Jiangsu Huaneng Elec MLT-5020. Other buzzers of that size are also an option, as long as their footprint isn’t much bigger than 5×5 mm. ...
feklee's user avatar
  • 1,321

1
2