Features

  • Lithium polymer battery charger, based on MCP73831, charging at 500mA through the onboard USB mini-B connector (2K charging resistor).
  • Boost regulator provides 5V output up to 400mA (click for LTC3525 datasheet). Please be aware that the booster output current depends on the input voltage (ie you cannot get 5V@400mA from a 1V battery that is mostly depleted), see the datasheet for the expected boost output current graphs.
  • Power your Moteino or other projects from a single AAA/AA cell, or alternatively from a rechargeable lithium battery
  • Side headers match the Moteino pin layout so you may stack your Moteino on top/below
  • Charging status LED: ON while charging
  • avoid plugging the USB without LiPo battery attached
  • USB mini-B port: for charging lithium batteries only, do not use with any other battery type
  • Small prototyping area allows you to solder your small circuits directly on the board and route the inputs/outputs to Moteino pins
  • Integrated battery voltage level detector using RC components, read battery level on A7 of Moteino (cut the trace leading to A7 if the trickle current leakage of this little passive voltage monitor is not desired). The ratio is batt>470K*1Meg>GND with A7 connected to the * point. See the schematic for details. This ratio may change in the future.
  • JST 2mm connector for lithium batteries, or solderable pin holes for battery holders, etc
  • compact layout