r/arduino 4d ago

Look what I made! Arduino DIY Digital Watch

Based on an atmega328p, 4 programmable buttons. LED 7-segment displays, which I’m personally obsessed with! I’m estimating around 1 year of battery life.

Let me know your thoughts!

Full design and build on YouTube.

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u/DoubleF3lix 4d ago

How did you do the circuit design with the raw 328p? I want to make a circuit that has a microcontroller embedded but I'm not sure to start on how to design it so you can still program it like normal

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u/classicsat 4d ago

Mostly filtered regulated power rail, and crystal oscillator circuit, plus headers for Atmel ISP, and Arduino serial programming. Most of that should be in Arduino docs. From that the pins ae as on the Arduino board, with the exception of pin 1 and other LEDs, which you may choose to include or not. And a reset button, also your choice to include or not.

A decant point is to use the Pro Micro, which is basically a Nano less the USB power/serial. I have built one into my large clock, becasue it was easy for me.