Looking for feedback...

Topics related to the HV Rescue Shield:
http://mightyohm.com/hvrescue2
rtz
Posts: 1
Joined: Wed Oct 24, 2012 4:46 pm

Re: Looking for feedback...

Postby rtz » Thu Oct 25, 2012 4:38 am

Hi received this recently, did not think I would actually use it. I ended up using it on my 32u4, seems to be working. I wired the pins to the 328 and connected to the pins on the 32u4 manually. Just followed the pin mapping on the 32u4 datasheet pg 350. It seems to be able to read/write the fuses without any code modifications.

Thanks!

quarterturn
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Joined: Wed Dec 12, 2012 5:50 pm

Re: Looking for feedback...

Postby quarterturn » Wed Dec 12, 2012 5:52 pm

I built a v2 kit recently. It works in most wrong fuse instances. However, I found a few chips which could only be fixed with an external 1 mHz signal on XTAL1.

I'm going to mod my own board with a TTL 1.0 mhz oscillator. Perhaps this would be a good addition for v3?

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mightyohm
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Re: Looking for feedback...

Postby mightyohm » Sun Dec 16, 2012 9:30 pm

You're welcome and thank you! :D

danringer
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Joined: Fri Mar 01, 2013 3:11 pm

Re: Looking for feedback...

Postby danringer » Fri Mar 01, 2013 4:23 pm

Awesome product, I bought the bare pcb and sourced the ic and parts from samples and digi key. $6 for the pcb and $5 from digi key and sampled the lt3464 from linear. It was my first time with surface mount ic's. I've done 0805 components but ic's that small was something new. It all went very well following the schematic and the BOM. Test point measured 12v first try and sketch loaded on 1.0.1 without any hang ups.
Dead chip was an atmel 328p-pu from a gertboard which died unexpectedly. Was unresponsive with avr dude on Debian with ISP from gertboard. Failed to revive from breadboard with correct clock timing down to 1mhz. First try with rescue shield reads lfuse=1 and hfuse=D9, I set to 0x62 and 0xD9 respectively. Said successful, but read 63 and D9.

Ran:

Code: Select all

avrdude -qq -c gpio -p atmega328p -U lock:w:0x3F:m \
        -U efuse:w:0x07:m -U lfuse:w:0xE7:m -U hfuse:w:0xD9:m

With gertboard, burned bootloader, and loaded blink, all succeeded on first try.

Any reason for the differences with lfuse? Awesome besides. Thank you.

Marcrob
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Joined: Sun Apr 06, 2014 11:46 am

Re: Looking for feedback...

Postby Marcrob » Sun Apr 06, 2014 12:13 pm

Hi,,

I do not have the hardware as i can bread board it and use an NPN to do the 12v on/off instead of the DC - DC, by simply setting the RST to low and high inverted to the new board.

I would recommend if its at all possible to add 3 button switches to the board, labeled : 1. Atmega 2. Attiny2313 3.HSVP, and maybe one for Auto mode, would require a bit of a code change, to make it more automated so a person can just pop the shield on and press a button.

Also if its possible to add an Programmed ISP device to load software onto the Atmega328/Arduino automatically so there is no pc interaction at all :)

I know i am asking a lot.

yodor
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Joined: Sat Apr 12, 2014 5:25 am
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Re: Looking for feedback...

Postby yodor » Sat Apr 12, 2014 5:42 am

Thank you very much for this project.
Exactly what I was looking for - a generic HSVP fuse programmer.
I've ordered the semi compiled board that got the smd components already mounted - awesome.
Soldered quickly and then it started working flawlessly.
Followed your instruction about male pin soldering while already inserted in arduino - good tip.
I've been able to restore few chips that I have burned with wrong fuse settings (atmega328/328p).
Usually distributors sell you chips with default fuse settings that require an external crystal oscillator, but I usually use the 8Mhz internal clock.
Great addition to my DIY ponyser serial programmer 8-) 8-) 8-)
I do NOT miss the upload sketch functionality in the firmware too much.

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mightyohm
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Re: Looking for feedback...

Postby mightyohm » Thu Apr 17, 2014 8:23 pm

thanks for the feedback!

brunortt
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Joined: Mon Aug 10, 2015 4:03 am

Re: Looking for feedback...

Postby brunortt » Thu Aug 13, 2015 10:21 pm

Hi,

I decided to buy the AVR HV Shield 2.1 Rescue thinking behind a stand in which to make any questions you could answer and guide, but after seeing that pose a
h t t p : / / mightyohm.com/forum/viewtopic. php? f = 7 & t = 4630
with more than twenty visits and not one answer I think I was wrong to buy it.

Anyway, thanks.

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mightyohm
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Re: Looking for feedback...

Postby mightyohm » Sat Aug 15, 2015 1:00 pm

brunortt,

Sorry for the delay. These days I typically can't check forums during the week so most of my replies are on the weekends.

hlawka_667
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Joined: Sat Aug 15, 2015 2:10 pm

Re: Looking for feedback...

Postby hlawka_667 » Sat Aug 15, 2015 2:17 pm

Excellent project - simple to build. But green Ready LED failed to illuminate when first tried. Red LED lights up, but nothing is written to the part (ATmega328P). Tried both original and "Plus" sketch versions. I'm going to try some other Arduinos and 328Ps and see if that affects matters.

The board is so simple to build that it's hard to see what went wrong - no solder bridges I can see (I was careful about the LED polarity).

Any other suggestions?

Thanks