How to use an Arduino based high voltage fuse programmer on Digispark without having to modify the board, remove parts etc.

If you are trying to re-program the fuses on the Digispark ATTINY85 using an ISP programmer but you mess up the fuses, you can use a high voltage programmer directly on the module to re-gain functionality of the device.

Note: The rise time for VCC on the scope trace at around 7:30 in does look like it may rise high enough within 20 µs as required, but sometimes it takes longer so adding a 100 µs delay made it more reliable. Scope traces were added to Github showing VCC rise time of ATTiny85 alone (fast) vs powering the Digispark board (gradual ramp).

Sketch/Schematic:
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Original video detailing the high voltage programmer used in this adaptation:
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Direct Project References:
Ralph Bacon's version of the Arduino DIY project:
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Useful Tools:
AVR Fuse Config Calculator
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Online schematic drawing for quick circuits:
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Background music from the Youtube music library:
A Rising Wave by Jeremy Blake
Ridge Racer by DivKid

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