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Re: bells, buzzers, and whistles
Quote:
Originally Posted by kamocat
It says 300-500hz, so I'm guessing it includes a switcher.
Apparently the digital module can put out 64mA, but I think I'll use a small transistor to amplify it. 6V*20mA = 120mW. A 2N2222 should do fine, but I hope the buzzer will run on 5V.
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My experience with these is they include very rudimentary, very noisy types of signal generators (see one person's teardown), so I suspect the range is in fact a range, and the frequency depends on the specific amount of voltage/current being supplied to the device, environmental factors, etc. 5 volts should work fine.
--Ryan
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That's just the thing about plastic or brass gears; they tend to morph into plastic or brass washers real fast. - Nick Seidl [more] 
24-12-2010, 01:05
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