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The Buzzer is Widely used in computers, printers, copiers, alarms, electronic toys, automotive electronic equipment, telephone, timer and other electronic products as a sound device.
MDA
Reviewed in the United States on February 3, 2025
You have to put your ear right on top of it to hear the sounds......
Gman
Reviewed in the United States on January 16, 2025
I needed a 5 volt piezo buzzer and this worked great for my project. The piezo buzzer has just the right amount of audio output. Not annoying when the buzzer turns on.
Greg T Roberts
Reviewed in the United States on May 30, 2024
These worked great for my home alarm system. I bought a Konnected kit to convert my old wired system to have remote access. I wanted to add beepers to both alarm panels, so I got these, and they worked perfectly.
Raymond Lavoie
Reviewed in Canada on March 20, 2024
OK, mais il ne fonctionne pas tous
Deltronics
Reviewed in the United States on February 9, 2023
Arrived in good condition, small size was perfect for replacement in my multimeter. Has a nice and suitable sound level. Construction is good and PCB solder pins are marked for + and - . Recommend this item for hobby or general replacement in meters.... etc.
isoseeker
Reviewed in Canada on February 21, 2023
Like other reviews have stated, works great at 3v. Have this hooked up to 1xcr2032 and the sound can be heard outdoor at about 60ft. Currently using it as an alarm for ice fishing.
richard
Reviewed in the United States on October 21, 2023
Got these for DIY model rocket-finders to track lost models in tall grass. They work great, good volume but not ear-bleeding.
Ric
Reviewed in the United States on March 9, 2022
While it may be true that these are loud enough for certain Arduino projects, please be advised that if the plan is to use them with Gotek drives, unassisted, they're barely audible.
Bill
Reviewed in the United States on December 31, 2022
Used them on a project in both cars. They worked fine and were loud. Just apply 3.3v. Notice these are polarized meaning connect the + to positive 3.3v and - to ground.
Kamel
Reviewed in the United States on August 12, 2020
I actually accidentally purchased these. When searching for the right piezo speaker, they were one of several I had looked at but couldn't be sure of the needed voltage to drive it so I went with another brand. I guess somewhere along the line I clicked add to cart by accident.I'm very glad I made the mistake, because these were substantially better than the other brand I got (which were marketed specifically as working with the Raspberry Pi & Arduino, stating the voltage as 5v). I don't understand how the other brand expects the user to switch the 5v, as GPIO pins are only 3.3v, but I digress.These are very loud when driven by a standard 3.3v GPIO pin - simply give them 3.3v and out comes a loud satisfying yet annoying beep. If you want, you can even do some pitch control. I played around with it and got best results in a pretty low frequency range of around 100-500, with a duty cycle of around 10. Keep in mind, the PWM I'm using is software based, so it isn't timed flawlessly. I don't need tone control, so I didn't take it any further than that. I have no doubt with an arduino or other better suited device you could easily produce clean loud tones up to about 15khz.To sum it up, 10/10 best accidental purchase I've ever made hands down lolIf you'd like some demo-code, here's how you can do software PWM for pitch control on the raspberry pi```import RPi.GPIO as GPIOfrom time import sleepGPIO_BUZZER_PIN = 21dutycycle = 10freqs = [250,100]GPIO.setmode(GPIO.BCM)GPIO.setup(GPIO_BUZZER_PIN, GPIO.OUT)p = GPIO.PWM(GPIO_BUZZER_PIN, dutycycle)p.start(dutycycle)for i in range(0,3): for freq in freqs: print(f"{freq}Hz") p.ChangeFrequency(freq) sleep(0.5)p.stop()GPIO.cleanup()```
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