I recently bought the Attiny85 (picture below)

enter image description here

I managed to install it correctly following the official guides, never that a problem. Drivers are installed correctly, and I used the Arduino IDE to actually upload a few sketches and tested them in two computers.


It has stopped working, based on my research, it seems that the bootloader got damaged....any idea on how to fix this? I thought about burning the bootloader using Arduino, but I barely got an idea on how to begin.

Backside of the Attiny85 enter image description here

  • You'd need a high voltage programmer to change the bootloader on the digispark. I've used a separate Arduino with a high voltage programmer sketch, a transistor and a stack of three coincells (for the high voltage), to change the fuses, to enable the reset pin. But it's not a very beginner friendly process. I'd cut my losses and get a new board. – Gerben Aug 3 '20 at 14:57
  • That sounds like a wonderful beginner project! In any case, if I buy a new one, this will probably happen again, so it is time to start getting into it right away. Do you have any resources on how to start doing this? I'm getting an Arduino Uno this week @Gerben – Corfucinas Aug 4 '20 at 2:54
  • I like your enthusiasm. I'm not sure what code I used, but github.com/ArminJo/ATtiny-HighVoltageProgrammer_FuseEraser seems like it will do what you want. It will reset the fuses of the ATTiny85 to the default values, re-enabling ISP on the ATTiny. It uses a boost converter to generate the 12V, but you could also stack 3 coincells and hold two jumperwires to each end (like I did). After that you can program the bootloader using the Arduino-as-ISP method. – Gerben Aug 4 '20 at 14:00
  • Wonderful @Gerben. I'll look at it and try it within a few days when my Arduino gets delivered. Thanks for the help (I'll let you know how it turns out). – Corfucinas Aug 5 '20 at 3:14

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