Search found 244 matches

by Squonk42
Fri Jan 19, 2018 3:54 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

that's indeed more affordable :) i'd certainly love to get a few pcb's to test with :) (and i'm completely set up to assemble these :). i can make my own solder paste stencils, have got good solderpaste, have got all required parts here, etc... :) ). Yes, I can arrange to ship what you need to you,...
by Squonk42
Fri Jan 19, 2018 7:09 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

that's indeed more affordable :) i'd certainly love to get a few pcb's to test with :) (and i'm completely set up to assemble these :). i can make my own solder paste stencils, have got good solderpaste, have got all required parts here, etc... :) ). Yes, I can arrange to ship what you need to you,...
by Squonk42
Fri Jan 19, 2018 7:05 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

I think the key is to have good vision, you dont need to be extremely steady because once you are pressing down the component just enough it will stay in place just by friction, and the iron doesn't need to be anything special, large tips still work as long as you can touch the end of the component...
by Squonk42
Thu Jan 18, 2018 10:39 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

i'm from europe (belgium). Not sure how much it would cost for squonk to send some to me (he's from france, neighbouring country). I just checked sending from belgium to france for example. The very least it'll cost is 7€ (that is if the total weight is below 350g and it's not thicker than 5mm) if ...
by Squonk42
Thu Jan 18, 2018 9:25 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

If the current connector is turned 180°, you can clearly see that it is not possible to have the card edge aligned to the PCB edge because of the microUSB connector depth, and that the microUSB plug prevents extracting the card anyway:
Image
by Squonk42
Thu Jan 18, 2018 9:17 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

EDIT: Another connector that seems to be short and narrow: https://www.aliexpress.com/item/20PCS-SD-Booth-Memory-Card-Sets-Socket-SD-Card-Connector-Short-Type/32800363795.html?spm=2114.search0204.3.44.7e5d091b9X57G1&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10151_10065_10344_10130_10068_10324...
by Squonk42
Thu Jan 18, 2018 6:07 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

You need to take your eyes of the tracks for a while and relax them, the radio button is for 50 not 60 ;) Oups, it was late and I am getting old :? About being blue, is a good point, $8 is not that much more, but being still a prototype, does it matter much? we could order 120 green boards for $29,...
by Squonk42
Thu Jan 18, 2018 5:55 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

Yea, that fmax is for a straight wire of length l, I think. Such big loop of wires is like a planar transformer :).. Anyhow, I have to stop with seeing the :twisted: in the details .. SDIO is ~25 MHz max, and the lengths are short... There is no better way to fan out these signals unless the Sd Car...
by Squonk42
Wed Jan 17, 2018 9:56 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

Also, any change to the components in this post? http://www.stm32duino.com/viewtopic.php?f=19&t=2633&start=360#p37849 Perhaps we should edit Roger's first post to add the links. Here is an updated BOM with links to Aliexpress vendors. I suppose everybody has headers from a spare BluePill, but there...
by Squonk42
Wed Jan 17, 2018 9:09 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11898

Re: F405 & F411 versions of the BluePill

@Squonk42: the big blue traces loop in the middle.. would it work? What do you mean, the SDIO bus? Here are the stats: Signal f max. [MHz] l [mm] A [mm2] R [mOhm] w min [mm] max [mm] Imax [A] SDIO_CK 9094.55 32.965 0.005 107.53 0.152 0.152 0.50 SDIO_CMD 10779.22 27.813 0.005 90.73 0.152 0.152 0.50 ...