There are only four components: an Arduino Nano, a DS3231 RTC module, a SSD1306 128×64 OLED module, and a momentary pushbutton.

The build relies on that old stalwart, the Arduino Uno, to run the show. It’s hooked up to a DS3231 real-time clock module so it can keep accurate time for long periods, as is befitting a clock.

Arduino created a Renesas RA4M1 microcontroller board in its Nano form-factor. Called Nano R4, it follows the Uno R4, the first Arduino to use the RA4M1. Episode 13 of our podcast CHIIPs is out now, ...

The Arduino Nano microcontroller is central to the operation of this pendulum clock. It processes the data from the accelerometer and controls the timing of the electromagnetic coil’s push.

The Nano Every is a pin-equivalent substitute, so previous code and wiring will still work. Arduino has also swapped out the Nano's mini-USB connector in favor of micro-USB.

It has almost similar specifications as the Nano's microcontroller, which features 16 MHz clock speed, 32 KB flash memory, and 1 KB EEPROM. However, it comes with a slightly larger SRAM of 2.5 KB.

512KB SRAM and 16KB of RTC SRAM Dual-core CPU at 240 MHz clock speed USB-C programming port The Arduino Nano ESP32 is available to order today in the Arduino Store, starting at $18.