Digital Monster COLOR Battle Adapter

A gadget lets monochrome Digimon devices battle with Digital Monster COLOR.

https://youtu.be/3llq2AYL4uE
https://youtu.be/2clZAX2tijY

Gerber file(for PCB):
https://drive.google.com/drive/folders/1QwX_pZAklBOFmARD0F67738Abkg49POx
The PCB thickness is 0.8mm.

Arduino hex file:
https://drive.google.com/drive/folders/1lbViPlmhFyj7F8iAps789VTcXpcFqi5m

Arduino ino file(EEPROM only):
https://drive.google.com/drive/folders/1yo-gvIsVYdNp845QTo6VBdKlMFKvJwl6

EEPROM file:
https://drive.google.com/drive/folders/1qd63HvKXHGxooGx-nyDBr-5qDdv5mwUz

Instructions:
1.Get an AVRISP or build an Arduino ISP.
2.Using avrdude.exe to change ATtiny85's fuses.
LFuse: 0x62 HFuse: 0xD7 EFuse: 0xFF
avrdude-GUI (yuki-lab.jp Version): https://yuki-lab.jp/hw/avrdude-GUI/index.html
AVRDUDESS - A GUI for AVRDUDE: https://github.com/ZakKemble/AVRDUDESS
3.Select below one out of three:
A.Upload "DMC_Battle_Adapter_EEPROM_20231208.hex" to ATtiny85.
B.Write "DMC_Battle_Adapter_EEPROM_20231208.eep" to ATtiny85's EEPROM (using avrdude-GUI).
C.Write "DMC_Battle_Adapter_EEPROM_20240810.eep" to ATtiny85's EEPROM (using AVRDUDESS).
4.Upload "DMC_Battle_Adapter_2024XXXX.hex" to ATtiny85.
5.Put all the parts together.

P.S. If you want to change the combat power, you can edit "DMC_Battle_Adapter_EEPROM_20231208.ino" and upload it by yourself.
Default combat power: https://docs.google.com/spreadsheets/d/1SpGrMhfRb1XxbWsIbZamGIBZIC8kKQhM

There's a serial output on PB4(TX), you can read the outcomes through a USB-TTL device. Baud rate: 9600

If LEDs keep blinking that means EEPROM isn't writing correctly.

ATTINY85-20SU
1206 104 SMD Capacitor
1206 SMD LED Red
1206 SMD LED Blue
SMD Slide Switch MSS22D18G2
AG13/LR44 Horizontal Battery Holder
Foam Tape 1mm Thick
M2x6 Flat Tail Self-tapping Screw
Nickel plated steel strip (Thick:0.1mm Wide:3mm)
Pin header or wire cable

2024.06.28
Add 16MHz version:
https://drive.google.com/drive/folders/1mjk2773hcnIswi4TPda_MSYVOjdv3A4d

2024.08.07
Removed serial output and support Digivice 25th Color.

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