A DIY project that involves an ATmega328p that controlls a small monochrome OLED display powered by a chargable LiPo battery - or in short: a digital wrist watch.
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Real Time Clock: An IC keeps track of the current date and time even if the display and microcontroller is turned off.
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Li-Po battery management: The board features a charge controller that allows charging the battery via Micro USB. Another IC protects the battery from over-charging and over-discharging.
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OLED-Display: A monochrome 128x64 pixel OLED display is used to show the current time.
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Energy Efficiency: After displaying the current time for a couple of seconds the display turns off and the microcontroller enters a sleep mode. This saves battery power.
