Arduino AVR High-Voltage Serial Programmer


Posted on Feb 5, 2014

This Arduino sketch is useful for rescuing ATtiny microcontrollers rendered useless by incorrect fuse settings. It does this by putting the bricked tiny into high-voltage serial programming mode and writingthe fuses to safe values. The Arduino is connected to the tiny though 1k resistors and a 2N3904 transistor is used to switch 12 volts applied t


Arduino AVR High-Voltage Serial Programmer
Click here to download the full size of the above Circuit.

o the tiny`s reset pin. After uploading the sketch the Arduino sends Enter a character to continue.  repeatedly untilcommunications are established by sending a byte through the serial monitor. The Arduino then programs the fuses.




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