I wonder if this DMM (121GW) is built on any aspects of this "TIDA-01012" reference design at all? (50000 counts, bluetooth, etc)
It's not.
Standard multimeter chipset + ST ARM processor.
I wonder if this DMM (121GW) is built on any aspects of this "TIDA-01012" reference design at all? (50000 counts, bluetooth, etc)
It's not.
Standard multimeter chipset + ST ARM processor.
Oh cool. Thanks.
I'm learning lot about DMM design from reading some of that TI documentation. This is a good one too:
http://www.ti.com/lit/ug/tidubm4a/tidubm4a.pdf
It seems like nearly every new EEVBLOG video these days, Dave is carefully/deliberately unveiling a new small aspect of the pending 121GW DMM.
Here are a couple of screenshots from the recent EEVBLOG #972:
From these pics we can glean: Input protection stuff; 4(?) x PTC's, 3 x MOV's, 2 x power resistors, 1 large 1000V HRC 10A fuse, and 1 small type DMM HRC fuse for the low current range. Also looks like dual solder points for each input jack. Does that mean some kind of insertion detection/alert?
I wonder if this DMM (121GW) is built on any aspects of this "TIDA-01012" reference design at all? (50000 counts, bluetooth, etc)
It's not.
Standard multimeter chipset + ST ARM processor.
Whats the processor? and will it be open to custom firmware?
Whats the processor? and will it be open to custom firmware?
STM32L152D
Schematic and protocols will be open, not sure about firmware.
Standard low cost ST ARM programmer header.
Whats the processor? and will it be open to custom firmware?
STM32L152D
Schematic and protocols will be open, not sure about firmware.
Standard low cost ST ARM programmer header.
Awesome, will open up some possibilities for some since the chip is fully documented in the public domain and the schematic will help oodles too!
Whats the processor? and will it be open to custom firmware?
STM32L152D
Schematic and protocols will be open, not sure about firmware.
Standard low cost ST ARM programmer header.
Awesome, will open up some possibilities for some since the chip is fully documented in the public domain and the schematic will help oodles too!
I also can't see why code snippets can't be released. e.g. LCD drivers, maybe chipset driver etc.
I'd like it to be completely open source, but it's hard to convince companies to do this.
I also can't see why code snippets can't be released. e.g. LCD drivers, maybe chipset driver etc.
I'd like it to be completely open source, but it's hard to convince companies to do this.
I assume there will be some checking mechanism that flag or show if the dmm has been "rooted" ?
Otherwise it will be a support nightmare, cmiiw.
From the pictures it almost looks as if there's an ESP8266 in there, but next to the STM32L152D does not make sense I guess
From the pictures it almost looks as if there's an ESP8266 in there, but next to the STM32L152D does not make sense I guess
Bluetooth module
Yes, that's right, it looks like it's on its own little soldered-on daughter board, as I've seen before with "jellybean" bluetooth modules.
As for the DMM IC, my guess for the DMM front end IC is maybe the
Hycon HY3131 or the
Fortune FS9704B? The UEI DM397 DMM uses the 50,000 count FS9704B IC, but I thought the 50,000 count HY3131 seemed like a better feature match (eg, runs at 3.6V). But it might be neither of those two, maybe there are other dedicated 50000 count DMM IC chips out there?
And the DMM IC would work in conjunction with the STM32L micro I presume. I don't know too much about that area, but I'm interested in learning a bit.
Does this thing have an estimated time of release?
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Does this thing have an estimated time of release?
As soon as it's ready. The Gantt chart was thrown out the window a long time back
Is that going to be a Kickstarter as some people suggest in this thread or just "normal EEVBlog shop" ?
EEVBlog - We will sell no multimeter before its time!
Is that going to be a Kickstarter as some people suggest in this thread or just "normal EEVBlog shop" ?
Kickstarter
But presumably a normal stocked product afterwards ?
Is that going to be a Kickstarter as some people suggest in this thread or just "normal EEVBlog shop" ?
Kickstarter
But presumably a normal stocked product afterwards ?
Of course, but almost certainly at a higher price.
It's the usual problem of having to pony up a large sum of money for that initial minimum bulk production run.
Didn't do that for my new high voltage probe, because it's already (or will be) an off-the-shelf product, so I can order as many as I like. But still I pony'd up a lot of cash for initial stock.
Is that going to be a Kickstarter as some people suggest in this thread or just "normal EEVBlog shop" ?
Kickstarter
But presumably a normal stocked product afterwards ?
Of course, but almost certainly at a higher price.
It's the usual problem of having to pony up a large sum of money for that initial minimum bulk production run.
Didn't do that for my new high voltage probe, because it's already (or will be) an off-the-shelf product, so I can order as many as I like. But still I pony'd up a lot of cash for initial stock.
New high voltage probe? I don't see it in your main page store or on Amazon. The is the first I have seen any mention of it.
Will it have a dBm mode? That's something I use all the time - I do a lot of audio work.
In the case of Fluke, you need to stretch to a 187/9 or 287/9 to get that (and you know how these eat batteries!). The classic 8050A and 8060 models have it, of course, along with the 45. I use them all, along with an 8920A for wide BW stuff.
As it's only a bit of code, it's a shame that it isn't more widespread at the saner end of the market. I suppose a lack of a "dB" annunciator on the chosen LCD might rule it out?
For me, it'll turn a "maybe" into a "definitely"
Will it have a dBm mode? That's something I use all the time - I do a lot of audio work.
In the case of Fluke, you need to stretch to a 187/9 or 287/9 to get that (and you know how these eat batteries!). The classic 8050A and 8060 models have it, of course, along with the 45. I use them all, along with an 8920A for wide BW stuff.
As it's only a bit of code, it's a shame that it isn't more widespread at the saner end of the market. I suppose a lack of a "dB" annunciator on the chosen LCD might rule it out?
For me, it'll turn a "maybe" into a "definitely"
Hope I'm right here -- pretty sure it does have dBm mode
Sure, why not reveal a low-burden multimeter just after I order a uCurrent?
At least this uCurrent will have a lot of experiences to share with me, as DHL seems to be giving it a long vacation in Europe
Good timing, I fried my uCurrent last week. Never miss a genuine oppurtunity to buy more test gear.
Whats the processor? and will it be open to custom firmware?
STM32L152D
Schematic and protocols will be open, not sure about firmware.
Standard low cost ST ARM programmer header.
The only STM32L152xD device in LQFP64 package is STM32L152RDT6
Transistor tester?
Now that's a quality multimeter must-have feature, for sure! It's how you know if a DMM is any good or not