Search found 827 matches

by ag123
Fri Jan 19, 2018 3:30 pm
Forum: Projects
Topic: stm32f103c8 or esp32 for a datalogger
Replies: 20
Views: 357

Re: stm32f103c8 or esp32 for a datalogger

he gave the same incentive to me too :lol: when i will receive the esp32 i will decide which mcu to use and then make the pcb, the only problem is that i will see it in 2 months ahahah in italy the national post is soooo slow i was just looking for the esp32's spi pins andddd them are configurable ...
by ag123
Thu Jan 18, 2018 4:34 pm
Forum: Projects
Topic: stm32f103c8 or esp32 for a datalogger
Replies: 20
Views: 357

Re: stm32f103c8 or esp32 for a datalogger

i think u're giving me some incentive to try out esp32 too :lol:
https://www.aliexpress.com/wholesale?ca ... Text=esp32
earlier on some of my searches seemed to land me on somewhat pricier esp32 boards
by ag123
Thu Jan 18, 2018 4:09 pm
Forum: Projects
Topic: stm32f103c8 or esp32 for a datalogger
Replies: 20
Views: 357

Re: stm32f103c8 or esp32 for a datalogger

if floating point matters, i think F407 or maybe F405 is probably a king of the hill :lol: Dhrystone and Whetstone Benchmarks for stm32 http://www.stm32duino.com/viewtopic.php?f=3&t=76&start=160 ^^ almost 500 Mflops done by pito with overclocks i have that strange feeling that a F407 could literally...
by ag123
Fri Jan 12, 2018 5:38 pm
Forum: Projects
Topic: Alternative USB Discovery Circuit
Replies: 3
Views: 189

Re: Alternative USB Discovery Circuit

i think maple mini (and clones) has something similar https://github.com/leaflabs/maplemini/blob/master/maplemini.pdf i never quite examined it closely, but now i noted that there are 2 transistors which could be used to disable the D+ pull up to VCC (which interestingly is 3.3v). This seem to work ...
by ag123
Sun Jan 07, 2018 8:28 pm
Forum: General discussion
Topic: analog watchdog in adc
Replies: 4
Views: 144

Re: analog watchdog in adc

actually i'm looking for a comparator and in stm32f103, the simple analog comparator isn't there. instead st substituted the comparator with 2 digital threshold comparators hide it in the adc and called it 'analog watchdog', that sounds good as well :lol: a conventional LC meter circuit based on the...
by ag123
Sun Jan 07, 2018 8:21 am
Forum: General discussion
Topic: analog watchdog in adc
Replies: 4
Views: 144

analog watchdog in adc

https://jeelabs.org/article/1619b/
Image
it seemed to be there in stm32f103 (i.e. all the BP & MM etc), has anyone played with it?
it seemed like an underutilised useful stuff
:D
by ag123
Sat Jan 06, 2018 2:26 pm
Forum: Off topic
Topic: Linux Journal
Replies: 43
Views: 859

Re: Linux Journal

by ag123
Sat Jan 06, 2018 10:00 am
Forum: Projects
Topic: Temperature logger with Bluepill, microSD card and DS18B20
Replies: 9
Views: 340

Re: Temperature logger with Bluepill, microSD card and DS18B20

i used 1 of those 10,000 mah LIPO power bank, last 'forever' in my use case hardly switched on, occasional logging, last for ages, recharge once in a while, place VBAT on a coin cell keeps the rtc running literally perpetually :mrgreen: https://www.ebay.com/sch/i.html?_nkw=powerbank&_sacat=0 i'm thi...
by ag123
Fri Jan 05, 2018 9:48 am
Forum: General discussion
Topic: Happy New Year for 2018
Replies: 16
Views: 364

Re: Happy New Year for 2018

i'm late but Happy New Year all :D
by ag123
Fri Jan 05, 2018 5:13 am
Forum: Off topic
Topic: Meltdown and Spectre - Cortex M3 M4 not affected
Replies: 3
Views: 340

Re: Meltdown and Spectre - Cortex M3 M4 not affected

my guess is with 20k ram there isn't enough room for meltdown or spectre to live alongside the sketch as well :lol: