whitequark changed the topic of #glasgow to: glasgow debug tool · code https://github.com/GlasgowEmbedded/Glasgow · logs https://freenode.irclog.whitequark.org/glasgow
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<mehar> I'm looking at putting in a small pull request to help add some part numbers/datasheets for revC1--going through the history here suggests that the resistor networks RN1,RN3,RN4, and RN5 should be 33 ohms, but they are notated as 100 ohms in the schematic. Is that the correct value?
<mehar> (Sorry for the trivial question)
<whitequark> 33 ohms is the correct value
<mehar> Cool--I'll change that and have the part number reflect that. Thanks!
<_whitenotifier-9> [Glasgow] Wmyers559 opened pull request #131: WIP: Component clarification - https://git.io/fjOKe
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<_whitenotifier-9> [Glasgow] whitequark commented on pull request #131: WIP: Component clarification - https://git.io/fjOKv
<_whitenotifier-9> [Glasgow] Wmyers559 commented on pull request #131: WIP: Component clarification - https://git.io/fjOKk
<_whitenotifier-9> [Glasgow] whitequark commented on pull request #131: WIP: Component clarification - https://git.io/fjOKI
<_whitenotifier-9> [Glasgow] Wmyers559 commented on pull request #131: WIP: Component clarification - https://git.io/fjOKt
<_whitenotifier-9> [Glasgow] whitequark commented on pull request #131: WIP: Component clarification - https://git.io/fjOKm
<_whitenotifier-9> [Glasgow] Wmyers559 commented on pull request #131: WIP: Component clarification - https://git.io/fjOKB
<_whitenotifier-9> [Glasgow] marcan commented on pull request #131: WIP: Component clarification - https://git.io/fjOKE
<_whitenotifier-9> [Glasgow] whitequark commented on pull request #131: WIP: Component clarification - https://git.io/fjOKu
<_whitenotifier-9> [Glasgow] marcan commented on pull request #131: WIP: Component clarification - https://git.io/fjOKa
<_whitenotifier-9> [Glasgow] whitequark commented on pull request #131: WIP: Component clarification - https://git.io/fjOKV
<_whitenotifier-9> [Glasgow] marcan commented on pull request #131: WIP: Component clarification - https://git.io/fjOK6
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<_whitenotifier-9> [Glasgow] Wmyers559 synchronize pull request #131: WIP: Component clarification - https://git.io/fjOKe
<_whitenotifier-9> [Glasgow] Wmyers559 synchronize pull request #131: WIP: Component clarification - https://git.io/fjOKe
<mehar> I'm going through the resistors right now, and noticed that they seem to be split among several families from Yageo, some for automotive purposes, and others not. Should I align these all to be from the same general family?
<mehar> RE: issue #131
<_whitenotifier-9> [Glasgow] Wmyers559 synchronize pull request #131: WIP: Component clarification - https://git.io/fjOKe
<_whitenotifier-9> [Glasgow] Wmyers559 commented on pull request #131: WIP: Component clarification - https://git.io/fjODO
<marcan> esden: do you have the MPN for the ferrite bead you always use?
<marcan> mehar: I'll let whitequark confirm, but I think there's no reason not to make the resistors uniform
<marcan> those are all jellybean interchangeable as far as I'm concerned
<esden> uhh the ferrite is pretty much a 600ohm 0402 jelly bean part. I can check what reel I got last time. :)
<esden> If you are making lists for digikey it would almost make sense to have links to searches that will spit out the lowest price component with the needed parameters. For example for the ferrite: https://www.digikey.com/products/en/filters/ferrite-beads-and-chips/841?FV=400004%2Cmu600+Ohms+%40+100MHz%7C2280%2Cffe00349&quantity=100&ColumnSort=1000011&page=1&pageSize=25
<esden> I would really not bolt it down to just one specific resistor capacitor vendor number. That is in my opinion bit silly.
<esden> And yes, I rarely buy single units of those small parts. I rather add them to my "magic box" containing all the different values of parts for prototyping. :)
<mehar> Fair--I've just been basically going off what the existing part number scheme.
<mehar> s/what//
<esden> Yeah that makes sense. I know that bigger design houses have full database backends that they link to from their Altium design. They then have a full list of parts that can choose from to place in that specific place. And then to make sure there are no mistakes they buy a specific part from a specific vendor for that 100uF decoupling capacitor because it was specified by the designer. :D I wish there was a rigid way to do that.
<esden> (ugh ... I suck... 100nF obviously >_<)
<esden> (making a counter point to myself right there, it is important to be accurate *sigh*)
<mehar> Also, fun thing i've found while doing this: The ice40hx8k-bg121 is only available from mouser in increments of 260 units, shipped directly from lattice.
<esden> Yeah, they are slowly phasing out all the not ice40up parts ... they don't want people to use the other parts in new designs if they can help it...
<esden> I bet they will be available for quite a while still, but they will make it harder over time.
<esden> But these things can always change, who knows. :)
<esden> When I talked to them about it they said: "You should use the Mach XO instead." -> my response: "when will you add support for that in the open tools we can talk" >_<
<esden> mehar: I mean...
<esden> Unless I am missing something... :)
<mehar> Ah, yes, they definately can be found. I was just slightly amused at that behavior on a product marked as `new' on Mouser.
<esden> lol, that is indeed funny. :)
<esden> Arrow also says it is "new" o_O
<daveshah> The BG121 package is much newer than the other packages
<daveshah> Support was only added in the last iCEcube2 version (2017.08)
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<esden> daveshah: ahh, good to know! :)