Products from the USA may come with an input voltage of 110V–120V, requiring a step-down transformer. Check the device wattage to select the correct power converter.
•1. Using the Atmega328 microcontroller
•2. 2x16 character LCD display shows the result.
•3. One-button operation automatically turns off the power.
•4. The shutdown current is only 20nA and supports battery operation.
•5. The low-cost version does not require a crystal and supports automatic power off.
From USA
