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USBtinyISP + Fuze? read this!
Moderator: adafruit

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USBtinyISP + Fuze? read this!

by adafruit on Sat Jan 03, 2009 4:39 pm

You will have difficulty because the small resistors (big load) on the programming lines
Be sure to do the "jumper hack" which takes out the output resistors R4 and R7
its at the end of http://www.ladyada.net/make/usbtinyisp/solder.html

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Re: USBtinyISP + Fuze? read this!

by pragma on Thu Jan 22, 2009 7:10 pm

Thanks for posting this. I was going crazy wondering why the ISP wasn't working correctly. :D

After I de-soldered the Tinyusb's R4 and R7, and replaced them with jumpers, I was able to burn one of the Uzebox demonstration programs with no problems.
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Re: USBtinyISP + Fuze? read this!

by unwiredben on Tue Mar 03, 2009 2:17 am

I'm glad I found this... I thought I'd burnt out my 644 and even placed an order for a second one this morning. After reading this, I replaced the resistors and was able to reflash my Fuzebox. Ladyada, you should really add a note about this to the "programming for the first time" page on http://www.ladyada.net/make/fuzebox/upload.html.
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Re: USBtinyISP + Fuze? read this!

by Thunder3000 on Tue Mar 03, 2009 6:46 pm

So what do those resistors do anyway? Looking at the USBtiny schematic, i can't figure out why they're there.
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Re: USBtinyISP + Fuze? read this!

by adafruit on Tue Mar 31, 2009 10:50 am

hm, i thought i did. but it looks like i didnt. which is odd.
anyways, the usbtiny was ORIGINALLY -only- designed to program spokepovs. the 'it can program chips' thing was kind of an extra!
but then, it turned out people really wanted that instead. (oops)

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Please be positive and constructive with your questions and comments.