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Step 4Hook the battery up and try it out!
I just taped the battery to the underside of the board. Not pretty but it gets the job done.
I measured the circuit current and it was drawing about 50uA in light and about 100uA when dark. I believe an average 9v has a capacity of around 500mA so this means this device can ring continuously for about 200 days. :P
I measured the circuit current and it was drawing about 50uA in light and about 100uA when dark. I believe an average 9v has a capacity of around 500mA so this means this device can ring continuously for about 200 days. :P
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