Remember the good old PDAs or Personal Digital Assistants that people used for taking notes, keeping schedules, keeping a tab ...

But 0.96″ OLED displays are not ... The brains of the operation is an Arduino Pro Micro, which addresses each screen individually via two 74HC4051 mux ICs. Thanks to an SD card module, there ...

As Hackaday revealed, this one comes with an E Ink display, a secondary OLED panel, and a keypad made ... software written in C++ using the Arduino IDE. Currently, all the device offers is an ...