Due to server issues & outages with Endicia - There is no USPS / Postal service orders at this time - Read more.

ATTiny Fuse Reset Tool (based on Arduino)
Moderators: adafruit_support_bill, adafruit

ATTiny Fuse Reset Tool (based on Arduino)

by wholder on Wed Nov 24, 2010 8:14 pm

This post is a follow on to another thread that discussed how to recover a "bricked" ATTiny chip, such as an ATTiny13, 24, 25, etc. Since posting a solution there, I've refined my design a bit more to include a "charge pump" circuit that generates the 12 volts needed to reprogram the fuses using the HVSP programing mode. The unique thing about this new circuit is that the change pump is built entirely from basic components and does not require an exotic (expensive, or hard to obtain) IC to generate the 12 volts. Instead, it uses an interrupt routine that runs in the background on the Arduino to drive a Dickson Charge Pump. The extra circuitry needed consists of 4 diodes, 4 capacitors, 3 resistors and a 2N3904 transistor. If anyone finds this useful, please let me know.


Posts: 40
Joined: Mon Mar 16, 2009 1:09 pm

Re: ATTiny Fuse Reset Tool (based on Arduino)

by gerald75 on Mon Dec 31, 2012 2:42 am

Hi Wayne,
I am trying to duplicate your dickson charge pump.
https://sites.google.com/site/waynehold ... harge-pump

I am running into problems...Do you happen to have an image of your circuit/bread board....so I can check with what I have....
thank you,

P.S. I am trying to get this done by the first of the year...Please help me.
Posts: 1
Joined: Mon Dec 31, 2012 2:37 am

Re: ATTiny Fuse Reset Tool (based on Arduino)

by AdamPater on Sun Apr 07, 2013 2:59 am

I'm doing much the same. Did you end up with any success?
Posts: 1
Joined: Wed Mar 20, 2013 7:24 am