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AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter

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sleemanj:

--- Quote from: matura713 on July 15, 2017, 06:19:04 am ---Because if not, then there are much better DMM for basically the same money than AN8008.

--- End quote ---

Again for the curious, the first post of that russian thread ( http://kazus.ru/forums/showthread.php?t=112135 ) has a fairly comprehensive list of the meters, and various reverse engineering and hacks of the 0660 based meters.

matura713:

--- Quote from: kalel on July 15, 2017, 06:46:44 am ---
But, I'd also like to add that not everyone (as in 100%) here can easily dump and flash EEPROMs. Maybe it's almost everyone, but perhaps someone who is not so experienced with flashing also bought the multimeter? :)

so it might be possible, but anyhow still seems like a risky prospect unless you're experienced.

--- End quote ---

if you look at some of my posts in this forum, you will see i am complete amateur, my knowledge of electronics is below what i would consider a very basic level. however, dump/modify/flash EEPROMs I consider very easy, but maybe because I can program in several programing languages and thus reading and writing memory feels like something more natural to me than other common electronic tasks.

anyway, if you have no experience, I believe the easiest is to get cheap USB EEPROM programmer like CH341A, it's about 3 USD delivered and 10 x EEPROM chips - they cost less than 1 USD delivered - 24C02N is EEPROM chips compatible with DMMs we're discussing here like AN8002 and AN8008.

so, you can even prepare few 24C02N with EEPROM dumps available online, then desolder from the DMM you're hacking and keep your original EEPROM chip and its content as backup and just solder the new EEPROM chip you prepared with your programmer to your DMM - that makes the risk to minimum or basically no risk, assuming you can solder.

matura713:

--- Quote from: sleemanj on July 15, 2017, 06:50:00 am ---
--- Quote from: matura713 on July 15, 2017, 06:19:04 am ---Because if not, then there are much better DMM for basically the same money than AN8008.

--- End quote ---

Again for the curious, the first post of that russian thread ( http://kazus.ru/forums/showthread.php?t=112135 ) has a fairly comprehensive list of the meters, and various reverse engineering and hacks of the 0660 based meters.

--- End quote ---

and just for completeness as that is good 0660 list, the known DMMs with the "new" DM1106EN, which so far looks like slightly modified version of 0660 chipset is:

* BSIDE ADM08
* PeekMeter PM18
* AN8008 (ZT109) --> discussed in the forum thread here

oh and BTW, in case someone don't know 0660 chipset is cheap Chinese clone of HYCON HY12P65 and I believe HY12P65 is in very reputable DMMs including the one that is EEVBlog branded.

plazma:



--- Quote from: matura713 on July 15, 2017, 07:01:03 am ---
if you look at some of my posts in this forum, you will see i am complete amateur, my knowledge of electronics is below what i would consider a very basic level. however, dump/modify/flash EEPROMs I consider very easy, but maybe because I can program in several programing languages and thus reading and writing memory feels like something more natural to me than other common electronic tasks.

anyway, if you have no experience, I believe the easiest is to get cheap USB EEPROM programmer like CH341A, it's about 3 USD delivered and 10 x EEPROM chips - they cost less than 1 USD delivered - 24C02N is EEPROM chips compatible with DMMs we're discussing here like AN8002 and AN8008.

so, you can even prepare few 24C02N with EEPROM dumps available online, then desolder from the DMM you're hacking and keep your original EEPROM chip and its content as backup and just solder the new EEPROM chip you prepared with your programmer to your DMM - that makes the risk to minimum or basically no risk, assuming you can solder.

--- End quote ---

IIRC the calibration parameters are in the EEPROM. So you need the meters original dump for modifications.

plazma:
I used a modified PicKit 3 clone to read and write the EEPROM in the AN8002.

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