Based on code https://gist.github.com/anteo/0e5d8867df7568a6523d54e19983d8e0
Board version 0.9:
Test version limitations: external 5v supply, no battery, no amp.
- ATmega328p-au, TQFP.
- 16mHz quartz, 5.0x3.2mm.
- 74HC595, SO-16, 3.9x9.9mm, P1.27.
- SD holder, hirose DM3AT.
- XC6206 3.3v, SOT-23.
- Some Rs, Cs and LEDs, 0805.
- Buttons, wuerth 434133025816.
- Programming pinheader, 5 pins, P1.27.
- SSD1306 OLED.
*The cpu must be flashed at least with Arduino bootloader before soldering or with provided hex file.
Many thanks to "Anteo" for his code. I just added oled support and a pause button.
Just some photos here.
Version 2.0 are coming...