ds1307 kills battery

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htool
 
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ds1307 kills battery

Post by htool »

My ds1307 seems to be working correctly.
I can set time and display it on the LCD display and also pint to the serial monitor, and all is OK when the USB is connected.
However when I run from a battery the time does not increment when the power is disconnected. When I reconnect the battery time starts from when I disconnected!

Also the 3.3v battery in the clock is dead.
the nice people at Adafruit ssent me a new battery.
I tested it and read 3.3v on my multimeter. I also test the impedance across the empty battery and read 7.6 Meg. ohms.


I inserted the new battery into the ds1307 and all seemed ok.

I disconnected the main battery, waited a few minutes. reconnected the battery, again it started at the time I disconnected.
I removed the new clock battery and now read 2.3 volts!

I did not include a picture as all seemed to be working correctly.

Thanks,
Bob

Could not move the slider the prove you are human

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Re: ds1307 kills battery

Post by adafruit_support_bill »

Make sure you are inserting it with the '+' side up. If inserted upside-down, the battery will short against the holder.
Also check that there are no stray solder spatters etc. in the holder that might cause a short.

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Re: ds1307 kills battery

Post by htool »

The + on the battery matches + on the holder.

All soldering was done on the back side.

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Re: ds1307 kills battery

Post by adafruit_support_bill »

Please post photos of your soldering and connections to the board.

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Re: ds1307 kills battery

Post by htool »

I have pictures from my cell phone, not good quality.
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DS1307pv1.jpg
DS1307pv1.jpg (251.29 KiB) Viewed 723 times

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Re: ds1307 kills battery

Post by htool »

page 2
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Re: ds1307 kills battery

Post by adafruit_support_bill »

I'd be concerned about those wires shorting out on the header. If you plan to hard-wire, omit the header and solder the wires directly to the holes.

In any case, I don't see anything that would explain the battery drain. Please contact [email protected] with a link to this thread for a replacement.

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Re: ds1307 kills battery

Post by htool »

Thank you for looking. Yes I do need a better supply of hookup wire.

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