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RTC VBAT  XML
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jrbenito



Joined: 28/08/2014 15:17:27
Messages: 15
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Hi Rick and All,

Is it possible to cut the PCB line connecting RTC VBAT pin to vcc? The idea is solder a wire to a externa battery to keep RTC running while MW is disconnected. The idea is to cut with knife and use the pad to solder the wire but I cannot see path (I guess it is bellow the RTC chip, am I right?)

Thanks.
Rick



Joined: 30/05/2014 22:08:56
Messages: 93
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Greetings,

Yes, the etch for VBAT (Pin 3) on the RTC runs under the chip, so it is not practical to try and cut the etch. The best way is to unsolder and lift the VBAT pin and wire directly to the lifted pin.
Hopefully it is easily doable for you, but let us know how things work out. Thanks.

Best Regards,
-Rick
jrbenito



Joined: 28/08/2014 15:17:27
Messages: 15
Offline

Rick wrote:
Yes, the etch for VBAT (Pin 3) on the RTC runs under the chip, so it is not practical to try and cut the etch. The best way is to unsolder and lift the VBAT pin and wire directly to the lifted pin.
Hopefully it is easily doable for you, but let us know how things work out. Thanks.


Thanks Rick!

Suggestion: next revision, think in left the vbat independent and connected to vcc through a pcb jumper. If one wants to use external battery just cut the jumper (knife) and solder a wire in the jumper pad.

BR
 
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