DIY GSM arduino FR4 cell phone

Because I have lot of interest in Tindie store, I am decided for simple version with atmega328, which is much more easy programmable without special programmer and also with standard 4digit segment display

first board assembled.

SAMD21 and display working :)

• Arduino Zero compatible Atsamd21e18
• Custom 0603 led matrix 22x5 LED - project details
• DS 3231 Precise RTC with CR2032 backup battery

Hi, If somebody want make this useless thing, I selling boards from prototype batch.

Tindie store

Firmware is very basic now, If you want make better code ... lets go ... :)

New boards ordered.

Features:

- AtsamD21E18 - arduino zero compatible

- DS3121 with backup battery.

- Micropython support

- 5x22 LED display from this project charlieplexed-matrix-display

- USB for upload firmware

- Power switch

Boards received and case assembled ...

Almost finished pcb design.

I separate batch to 2 batch:

1. back and side boards

2. top and cpu board

It is more versatile if I found error on CPU board I can use back boards

I am back focused for mega328 ... samd21 is prepared for next version with discrete leds matrix and micropython