I have a second doorbell because the one in the living room is too far away to hear from the computer - especially with music playing - but it uses up AA batteries far too quickly and I don't easily notice that it's no longer ringing with the main one. So I connected it up to a USB port instead...
![[USB powered doorbell]](https://sa.me.uk/photos/img/2008_01_27_19_24_45.jpg)
This page contains a single entry by Simon Arlott published on January 27, 2008 19:35.
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