Search found 770 matches

by ag123
Mon Nov 20, 2017 6:19 pm
Forum: Projects
Topic: using blue pill for stepper control - related to 3d printers
Replies: 5
Views: 225

Re: using blue pill for stepper control - related to 3d printers

oops a nema17 stepper i bidded on ebay arrived, i decided to go for the plain old and simple l298n i go for a module instead, it seemed the sum of the parts l298n, heat sink, diodes, caps, board, connectors (and they throw in a 78L05 regulator onboard) would actually cost more than simply buying the...
by ag123
Mon Nov 20, 2017 3:28 pm
Forum: Projects
Topic: using blue pill for stepper control - related to 3d printers
Replies: 5
Views: 225

Re: using blue pill for stepper control - related to 3d printers

yup, i do agree that running off a single core mcu is probably the simpler approach doing so in a loop for the present firmwares like marlin etc however, one issue is that blue pills / maple minis has a rather limited number of pins, controlling a h-bridge directly would probably need 2 pins for eac...
by ag123
Sun Nov 19, 2017 7:56 pm
Forum: Projects
Topic: using blue pill for stepper control - related to 3d printers
Replies: 5
Views: 225

Re: using blue pill for stepper control - related to 3d printers

while searching up ebay/aliexpress i noted that other than those pre-built breakout modules discrete l298n chips doesn't seem easily available on ebay / aliexpress https://www.ebay.com/sch/i.html?_nkw=l298n&_sacat=0 is the l298n 'discontinued'? it still seemed a rather popular chip / monolithic (ste...
by ag123
Fri Nov 17, 2017 3:43 pm
Forum: PR's bugs and enhancements
Topic: What about making the Libmaple interrupt handlers "__weak"?
Replies: 9
Views: 294

Re: What about making the Libmaple interrupt handlers "__weak"?

i think edogaldo's code snippets actually looked interesting, it would perhaps allow an isr from the sketch to live in flash rather than occupy some memory via attach_interrupt and often it means an additional call from the original isr with attach_interrupt i've not really studied libmaple's codes ...
by ag123
Fri Nov 17, 2017 12:08 am
Forum: Off topic
Topic: "New" "Multimeter"
Replies: 12
Views: 433

Re: "New" "Multimeter"

wow Andy, keep your 1944 multimeter well, it is certainly an antique, who knows if one day you managed to auction it off for millions :lol:
by ag123
Wed Nov 15, 2017 3:03 pm
Forum: Off topic
Topic: Uncle Andrew.. how come we have a $2 multi MHz board?...
Replies: 23
Views: 355

Re: Uncle Andrew.. how come we have a $2 multi MHz board?...

What make/model of phone? oh well, over the years i've accumulated a few :lol: including a sam s4, sam s7 and more recently an asus zenfone 3, my sam s7 died just shortly after warranty expires, luckily they didn't go up in flames just like those sam note 7 :P later i bought an asus zenfone 3 delux...
by ag123
Tue Nov 14, 2017 5:25 pm
Forum: Off topic
Topic: Uncle Andrew.. how come we have a $2 multi MHz board?...
Replies: 23
Views: 355

Re: Uncle Andrew.. how come we have a $2 multi MHz board?...

i've been wanting to install a custom rom on my phone so that those pesky apps won't complain that the phone is rooted. A truly custom rom probably doesn't need root, as everything can be root if u want it to be :lol:
by ag123
Tue Nov 14, 2017 3:21 pm
Forum: Off topic
Topic: Uncle Andrew.. how come we have a $2 multi MHz board?...
Replies: 23
Views: 355

Re: Uncle Andrew.. how come we have a $2 multi MHz board?...

The opposite of that question would have been a lot more interesting: Can today's smartphones be made to do something else? Like reading the input from an opamp, or lighting up a led string, ... oh well if u don't mind paring it with a blue pill or maple mini or perhaps any stm32duino capable board...
by ag123
Tue Nov 14, 2017 2:49 pm
Forum: Off topic
Topic: MicroPython News
Replies: 20
Views: 2081

Re: MicroPython News

actually one of those things that got me looking at micro python is their highly compact / miniaturized *boards* :lol: https://store.micropython.org/store/#/store sometime back i started a thread looking out for tiny stm32f4* boards, and it turns out micro python pyboard 1.1 is one of the very compa...
by ag123
Mon Nov 13, 2017 2:48 pm
Forum: Off topic
Topic: Uncle Andrew.. how come we have a $2 multi MHz board?...
Replies: 23
Views: 355

Re: Uncle Andrew.. how come we have a $2 multi MHz board?...

i used to think can't the nokia phone (with arm7tdmi) do anything else? today that 'wish' comes true with the advent of arduino and stm32duino, and the huge breakouts market that little stm32 and other mcus really do 'everything else' a mouse optical sensor used to be just that a mouse, but today it...