I got the Minicore bootloader to burn as well, sadly I am still having issues with not being able to upload sketches to them. The blinking pattern has changed however. It is now bliniking rapidly 3 times, on reset, but then turns off for one second, then blinks rapidly again, and repeats.
Is it continously rebooting? Why?
I left the bootloader burn setting to default with the exceptios of setting it to use the internal 8mhz clock. Anything else I need to do?
This is my exact steps at the moment:
1: Upload ArduinoISP to my uno, using the UNO board and AVRISP mkII setting.
2: Disconnect the board while I hook everything up.
3: I hook up the non-bootloaded atmega to the uno.
4: Change the programmer to Arduino as ISP and board to the Atmega328 "board" and set it to use the 8mzh internal.
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Burn the bootloader. It reports burning successfully (as far as I can tell).
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Replace the uno atmega with my new bootloaded atmega.
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Upload a sketch with 1. settings
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Get a timeout error.
What have I missed? Since it's possible to burn to the MCUs at all, I am guessing they aren't busted and I am making a mistake somewhere?
Edit: Got a hold of some 16mhz crystals and tried the external clock setup. Sadly, I get the same issue.
Since it's possible to