Connectors (M): https://aliexpress.ru/item/1005004732657004.html
Connectors (F): https://aliexpress.ru/item/1005006234432245.html
Button for encoder: https://aliexpress.ru/item/4000111239246.html
The counter mechanically compatible with the Elektronika-004, 003, Olymp-003 (clones of A700). The original A700 requires another shape of board.
For three board version latest firmware is 1.06. I do not use the counter on three boards, so I did not update the firmware for it. But version 1.06 works fine. The source code is freely available, everyone can make changes according to their needs.
Connectors (F): https://aliexpress.ru/item/1005006234432245.html
Button for encoder: https://aliexpress.ru/item/4000111239246.html
The counter mechanically compatible with the Elektronika-004, 003, Olymp-003 (clones of A700). The original A700 requires another shape of board.
For three board version latest firmware is 1.06. I do not use the counter on three boards, so I did not update the firmware for it. But version 1.06 works fine. The source code is freely available, everyone can make changes according to their needs.