Simple gsm phone with 22x5 LED display, 16 keys, atsamd21, and sim800l module, QI charging
Back and side boards
brd - 137.67 kB - 11/28/2016 at 11:25
Basic arduino test code and libraries
x-zip-compressed - 94.65 kB - 11/28/2016 at 11:22
Front panel and main board - schematic
sch - 765.45 kB - 10/13/2016 at 21:54
Back and side boards - schematic
sch - 281.73 kB - 10/13/2016 at 21:54
Front panel and main board - board
brd - 168.21 kB - 10/13/2016 at 21:54
first board assembled.
SAMD21 and display working :)
Hi, If somebody want make this useless thing, I selling boards from prototype batch.
Firmware is very basic now, If you want make better code ... lets go ... :)
New boards ordered.
- 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
Module received, I tested some call dial and receive from usb>ttl terminal
Power consumption is from 10mA standby to 200mA ringing.
Module play ringtone to speaker .... Nice surprise
I am start thinking abou use samd21 cpu instead atmega328 ....
1. This is same mcu as in arduino zero .... Arm 256kb flash
2. Adafruit making very promising micropython port. Script accesible in mass storage mode.
= It can by versatile board with native USB programable in Arduino ide or in Micropython.