Useful tips

If you make a device with external RTC module this essay can help you to make simplest backup powering (reverse power) using coin cell battery.

Simple way to make hardware revision (REV1, REV2, REV3) using only one ADC pin, that helps to easy identify board version using MCU firmware, which give a change to easy maintain all board revisions taking into account all the device schematic changes .

The only possible and correctly working way to extract (export) .step model from the EasyEDA footprint.

Small introduction in using plexiglas (acrylic) to make home-made electronic devices more good looking.

Compendium of information of use LEDs with reverse mounting techniques ?.