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Analog electric clock with a relay circuit for battery capac

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rnjcurtis(at)charter.net
Guest

Posted: Tue Aug 08, 2017 3:28 pm Post subject: Analog electric clock with a relay circuit for battery capac

Bob,

 

Some time ago you posted a simple circuit for doing an approximation of battery capacity.Â  The circuit consisted of an analog electric clock to measure the time required to discharge a battery, through a light bulb, down to 10 volts.Â  I would like to build one of these to use as an annual battery condition test.Â  Can you direct me to where I might find information on how to make one?

 

Thanks,

 

Roger

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user9253

Joined: 28 Mar 2008
Posts: 1908
Location: Riley TWP Michigan

Posted: Tue Aug 08, 2017 5:12 pm Post subject: Re: Analog electric clock with a relay circuit for battery c

http://www.aeroelectric.com/articles/battest.pdf



Or an easier way is to turn on the landing light or "Clip a 55w head-lamp bulb across the battery and come back in 2 hours to check the voltage.  If it's not at 11.0 volts or above, the battery is toast."

Go to

https://www.matronics.com/archive/archive-get.cgi?AeroElectric-Archive.digest.vol-lv

and search (CTRL-F) for "toast"

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Joe Gores

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