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PCB Batteries

Former Member

Hello all,

I am working on a project where I have to design the PCB. In that I am using CR2032 battery, but this is quiet large for my project. I am using CC2541 micro controller and need of 3V batteries......Can I use watch cell or button cell of same voltage in my project.?? Is there any library for that.?? since I am new to this eagle....can any one suggest me any other type of batteries.....or I have to use CR2032..??

Parents

  • Something else you need to address is instantaneous current draw - lots of

    these smaller batteries have relatively high internal impedance (especially

    when partially discharged), so it is a good idea to have a good bypass cap

    across the battery to deal with the spikes that happen with turning things

    on or off or processor startup etc.  Often the caps get left off to save

    space which ends up causing real problems as soon as the battery impedance

    goes up as it discharges (remember the old 9v transistor radios - you could

    often double or triple the battery life on the cheap ones with an

    electrolytic cap across the battery terminals to keep the impedance down.

     

    mikey

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

Reply

  • Something else you need to address is instantaneous current draw - lots of

    these smaller batteries have relatively high internal impedance (especially

    when partially discharged), so it is a good idea to have a good bypass cap

    across the battery to deal with the spikes that happen with turning things

    on or off or processor startup etc.  Often the caps get left off to save

    space which ends up causing real problems as soon as the battery impedance

    goes up as it discharges (remember the old 9v transistor radios - you could

    often double or triple the battery life on the cheap ones with an

    electrolytic cap across the battery terminals to keep the impedance down.

     

    mikey

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

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