Search found 795 matches

by ag123
Sun Dec 10, 2017 3:31 pm
Forum: General discussion
Topic: short on VBAT? another board another ailment 130mA currents
Replies: 12
Views: 494

Re: short on VBAT? another board another ailment 130mA currents

i'm actually thiinking in terms of doing a gimmick capacitor like this post from pito http://www.stm32duino.com/viewtopic.php?t=671&start=10#p27426 Basically it does not matter what kind of 32kHz resonator you use - it matters how you tune the frequency exactly. The difference 12.5pF vs. 6pF mostly ...
by ag123
Sat Dec 09, 2017 5:46 pm
Forum: Off topic
Topic: STM32 powered multimeter
Replies: 14
Views: 823

Re: STM32 powered multimeter

actually stm32f103 with 12 bits adc, my guess is that it is literally pretty accurate as 2^12 = 4096
i'm not too sure how that'd translate to counts though and i'm wondering if we use both adc on stm32f103 would there be possibility of getting higher precision?
by ag123
Sat Dec 09, 2017 5:26 pm
Forum: General discussion
Topic: short on VBAT? another board another ailment 130mA currents
Replies: 12
Views: 494

Re: short on VBAT? another board another ailment 130mA currents

well i simply soldered the 32k crystal at the pc14, pc15 pins that's intended for the crystal, but this time round i succeeded in using less solder. somehow by sheer chance it fills the hole nicely and keep the crystal contacts in place on the board there is no load capacitor, it is simply the cryst...
by ag123
Sat Dec 09, 2017 7:01 am
Forum: General discussion
Topic: Programmer's Manual?
Replies: 7
Views: 200

Re: Programmer's Manual?

for 'getting started' the original leaflabs docs is an invaluable resource http://docs.leaflabs.com/docs.leaflabs.com/index.html the rest is probably in the codes and when all else fail rm0008 is the stm32f10x bible (for the h/w io parts) http://www.st.com/resource/en/reference_manual/cd00171190.pdf...
by ag123
Sat Dec 09, 2017 6:27 am
Forum: STM32F103 Boards
Topic: Blue Pill crystal does not start
Replies: 13
Views: 433

Re: Blue Pill crystal does not start

more recently i've somewhat improved on my 32k crystal soldering, a recent attempt here http://www.stm32duino.com/viewtopic.php?f=3&t=2602&p=38423#p38423 oh yes, on another note, i keep vbat powered on a coin cell battery (cr2032), rather often i simply unplug usb, cutting off power, leaving rtc run...
by ag123
Sat Dec 09, 2017 6:22 am
Forum: General discussion
Topic: short on VBAT? another board another ailment 130mA currents
Replies: 12
Views: 494

Re: short on VBAT? another board another ailment 130mA currents

now somewhat improved on a new baite mm, no shorts this time round
but the steal? no caps they are actually needed but for now i take the short cut as it seem to work
Image
by ag123
Sat Dec 09, 2017 2:37 am
Forum: Off topic
Topic: Linux Journal
Replies: 32
Views: 396

Re: Linux Journal

i'd guess due to the various proprietary nature of laptops compatibility is commonly a problem for linux on laptops. rather often it is necessary and some trouble to find 'linux compatible' laptops prior to purchase i've got linux on a Asus ux305 it works as well as this article reads and suggests, ...
by ag123
Fri Dec 08, 2017 4:22 pm
Forum: STLink
Topic: DIY ST-Link V2 programmer (SWIM & SWD)
Replies: 1
Views: 132

Re: DIY ST-Link V2 programmer (SWIM & SWD)

+5 nice :D are those 5v zener really needed? i havn't looked at any specs or docs though, but my guess is we'd perhaps be able to program another stm32 or stm8s simply connecting the gpio pins? i'm not too sure if the normal 3.3v stm32 gpios would for instance be able to program another BP/MM over S...
by ag123
Thu Dec 07, 2017 2:00 am
Forum: Off topic
Topic: Linux Journal
Replies: 32
Views: 396

Re: Linux Journal

ot again: on a side note, i'm wanting to try to make arudino make files that'd build my sketches in linux with or without eclipse. it is one of those 'projects' that i wanted to do but never seem to be able to dedicate time to it. linux distributions normally has all the tools for a make file based ...
by ag123
Wed Dec 06, 2017 6:17 pm
Forum: Off topic
Topic: Linux Journal
Replies: 32
Views: 396

Re: Linux Journal

oh well, either way, it'd seem m$ and even the os itself is going the 'cloud' route these days, a trouble is many commercial s/w vendors still continue to do 'windows only', and oh yeah, they'd basically support 1 h/w platform and maybe even 1 os level (say windows 10), if windows 11 comes along goo...