This programmable pocket sized calculator has the following features:
- Credit card size, 8mm thick!
- ARM Cortex M4 Microcontroller
- microSD card reader
- OLED Display
- 44 mechanical* matrix keyboard (*tactile switches)
- Lipo battery charging circuit
- Unsoldered, showing it's thickness
- Soldered
- Front view of PCB without tactile switches and with OLED in place
- Back view of PCB unsoldered with battery, micro usb and micro sd card reader in place
- Altium's 3D Render of the PCB
