bells, buzzers, and whistles

[kamocat]

Thanks!
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.

[RyanCahoon]

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.

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

[Greg McKaskle]

I was looking to do this about a year ago, and ended up connecting a solenoid and a bell. A bit limiting, but easy and kinda retro-cool.

Greg McKaskle