I test a small alarm for current leakage with the switch in the OFF position.
It showed a drain of 2 uA.
Is that typical ?
Thanks, Andy
Current leakage
Dec 09, 2013
6 Replies
You would have to open the device to see if the switch really disconnects the internal circuitry. It wouldn't surprise me if there was a large cap on the DC input before the switch.
You also have to determine if the switch is even a switch in the literal sense of the word. To keep cost down, many switches are just a means to send a signal to the circuitry to wake up or not.
The caps are not labeled, so I suspect they are bottom of the barrel stuff. :-)
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I saw a procedure for determining the Farads, but it looked rather involved.
Andy
Where's it getting its power and how long was it on when you took the reading?
Power from 3 AA batteries
5 Seconds before I took the reading.Andy
Maybe,maybe not; how was the test done? Schematic?
The photos could be 5 times larger and less dark. Test a Farad a Day and the calculation will be simple...one Faraday!
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