I'm looking for something to modify an original Game Boy cartridge and make it possible to flash your own ROMs onto it.
I have found this person on the Tindie marketplace selling an adapter board but their product is Out of Stock for a while now.
I also found their affiliate link for ordering...
I recently received my EZ-Flash Omega and I got inspired by this video by Makho to add an LED so I know when the SD is being accessed and when it is safe to shut down the console.
Gabriel Daniel suggested in the comments for a different placement of the LED:
Melvin Maas agreed and wrote...