Difference between revisions of "RTC Board"

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= The RTC Board =
 
= The RTC Board =
 
== Introduction ==
 
== Introduction ==
The battery board is a simple Lithium Battery charger and power supply.  It has an ultra low power LDO (Low DropOut Regulator) to generate 3.3V from the battery inputIt works nicely with the [[PlatformBoard | Platform Board]] or right into your breadboard.
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Based on the low cost easy to use Real Time Clock IC MCP7940, this board offers a simple breakout for the part taking care of the sensitive crystal connections (probably wouldn't work very accurately on a breadboard). The 'N' version is with a battery backup, where the 'M' is notEither part can be used.... if the N version is placed, then the board also provides a CR1220 battery holder, which should work with 12 or 12.5mm batteries.
* Uses the popular [http://ww1.microchip.com/downloads/en/DeviceDoc/20001984g.pdf MCP73831] to handle the battery charging
 
* Ultra Low Iq (~2uA) Linear 3.3V Regulator [http://ww1.microchip.com/downloads/en/DeviceDoc/22008E.pdf MCP1702]
 
* Robust Micro USB connector for charging and standard JST connector for battery connection
 
* Breaks out the USB 5V in for detection or as a separate supply, also Battery Voltage is available for fuel gauging... or again as a separate supply.
 
 
 
 
== Schematic ==
 
== Schematic ==
 
[[File:Screen Shot 2017-01-04 at 9.40.14 AM.png|600px]]
 
[[File:Screen Shot 2017-01-04 at 9.40.14 AM.png|600px]]
 
== Purchase ==
 
== Purchase ==
Coming soon - given to Patrons Dec 2016
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Coming soon - given to Patrons ...
  
 
== Parts ==
 
== Parts ==
The parts list can be downloaded [http://www.kevindarrah.com/wp-content/uploads/2016/12/BatBoardV1.xlsx HERE]  This can be directly uploaded into  [https://www.digikey.com Digikey] if you'd like.   
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The parts list can be downloaded .....coming soon.... This can be directly uploaded into  [https://www.digikey.com Digikey] if you'd like.   
  
 
== Assembly ==
 
== Assembly ==
 
== Tutorials ==
 
== Tutorials ==
 
Coming soon
 
Coming soon

Revision as of 08:46, 4 January 2017

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Screen Shot 2017-01-04 at 12.57.08 AM.png

The RTC Board

Introduction

Based on the low cost easy to use Real Time Clock IC MCP7940, this board offers a simple breakout for the part taking care of the sensitive crystal connections (probably wouldn't work very accurately on a breadboard). The 'N' version is with a battery backup, where the 'M' is not. Either part can be used.... if the N version is placed, then the board also provides a CR1220 battery holder, which should work with 12 or 12.5mm batteries.

Schematic

Screen Shot 2017-01-04 at 9.40.14 AM.png

Purchase

Coming soon - given to Patrons ...

Parts

The parts list can be downloaded .....coming soon.... This can be directly uploaded into Digikey if you'd like.

Assembly

Tutorials

Coming soon