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DEV-10711 - LiPower Shield
Description
Is there anything an Arduino cant do? Well, for one, most of them cant be powered directly from a 3.7V LiPo battery; much less charge and monitor that battery. The LiPower Shield takes care of this by combining the functionality of two of our favorite battery power boards: the Power Cell and the Fuel Gauge.
The LiPower Shield allows you to connect a 3.7V single cell Lithium polymer battery which it will boost up to 5V and connect to the Arduino boards 5V pin. The on-board MAX17043G+U IC is connected to the I2C lines (A4 and A5) so that your project can monitor its own power supply. The configurable alert interrupt pin on the MAX17043G+U IC is broken out to D3 which will activate when the LiPo gets to 32% or lower.
The charging circuit is configured to charge the LiPo at 100mA but by adding a resistor to the supplied through-holes you can boost this to 500mA. There is a mini-USB port on the shield which allows you to charge the battery from a USB power source or you can supply a separate regulated 5V source on the "charge" header.
Note: Weve decided to leave the power indicator LED (LED1) and its current limiting resistor (R3) off this board, as they were producing a significant drain on the battery. Please be aware that your board will have a few, shiny, unpopulated pads.
Note: There is a known hardware bug that will allow the LiPo to discharge below the point where the charging circuit will revive it. Thanks to the on-board fuel gauge, however, some clever programming could keep your project from draining the battery as it gets too low.
Documents:
ESP32 is highly-integrated with in-built antenna switches, RF balun, power amplifier, low noise receive amplifier, filters, and power management modules. ESP32 adds priceless functionality and versatility to your applications with minimal Printed Circuit Board (PCB) area requirements. Adafruit 3320
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Velleman VTV3 mini mini vise in red with a suction cup
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ROSA3D filament made of high-quality PLA granules. 0.8 kg of filament with a diameter of 1.75 mm is wound on the spool. ROSA3D PLA Starter Pink
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AVT kit for self-assembly of an adjustable symmetrical voltage supply. AVT1882 B
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AVT kit for self-assembly of power amplifier with LM3886. AVT1922 B
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Evaluation kit with LittleBee GW1N-1 FPGA chip. Offers 1152 LUTs and 864 Flip-Flops (FF). The board has an FPC connector for the display and a USB type C. Sipeed Lichee Tang Nano
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10/100 Ethernet transceiver with Media Independent Interface, 3.3V, TQFP64, RoHS
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AVT kit for self-assembly of the RGB color mixer. AVT5596 B
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Raspberry computer case: Pi 3 model B +, Pi 3 model B, Pi 2 model B and Pi 1 model B + transparent. Made of plastic
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Precise volume indicator 2x15led - set for self-assembly
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DEV-10711 - LiPower Shield