DIY Alarm Siren / Simple Noise Maker without transistors using only a Speaker ✔
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YouTubeElectrical Projects [CreativeLab]
DIY Alarm Siren / Simple Noise Maker without transistors using only a Speaker ✔
How to Make simple Noise Maker (alarm device). This DIY Noise Maker is very helpful if you don't have a buzzer. No need for additional electrical components & easy to make, no need for circuit (schematic) to build. You can use it for diy home security project or simular projects. I used 3.7 volts cell phone battery for powering the device, if ...
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