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December 18, 2011
about 2 months ago
This board looks like it is over-engineered to me. Using a $5 accelerometer when a 3¢ vibration switch would do seems a little strange (unless you are a company that makes accelerometers).
I tried designing an analog circuit that would handle more output power and work over a wider output range on a smaller standby power budget:
I’ve not tried building it, though (too many SMD parts). If anyone tries it, please leave a comment on my blog!
about a year ago
If you want really light weight, and don’t mind disposable batteries, you get about the same energy from a #10 zinc-air battery that weighs 0.3g (100mAH at 1.4v).
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about 2 years ago
This summary does not explain derating ceramic capacitors, which lose their capacitance with a high DC bias.
No public wish lists :(
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