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Stavros Korokithakis
@skorokithakis
has anyone tried to power their ESP from their FTDI programmer? does it work well?
also, which software do you use for designing PCBs?
Chris Elsworth
@celsworth
that one is easy, Eagle :)
Sven Eliasson
@comino
Eagle is the best price/value
Stavros Korokithakis
@skorokithakis
i heard that kicad is better than eagle nowadays
Chris Elsworth
@celsworth
the first time I looked at it, I ran away screaming, but if you sit down with a good mug of favourite drink, you can learn it in an hour or two
beikeland
@beikeland
@skorokithakis varying success. most of my esp-05 doesn't work powered by ftdi, 50/50 on all the others i've tried.
Sven Eliasson
@comino
kicad was shit last time I used it - altium is still pretty nice but not that cheap :P
Chris Elsworth
@celsworth
@comino you mean free? ;)
free is sure good enough for my purposes anyway, not hit the pad limit yet
Stavros Korokithakis
@skorokithakis
@beikeland thanks, i'll try a regulator then
Sven Eliasson
@comino
free is limited - even pro is cheap compared to altium ;)
Stavros Korokithakis
@skorokithakis
hmm, i was going to start with eagle, but i saw this thread https://news.ycombinator.com/item?id=10676514
how much is altium?
Sven Eliasson
@comino
wow - looks like there is a good progress on kiCad
I will give it a try
Stavros Korokithakis
@skorokithakis
@comino the commenters there seem to like it a lot
Sven Eliasson
@comino
too much if your employer doesnt buy it for you ;) or you doo.. you know.. harhar
Stavros Korokithakis
@skorokithakis
i've used both, but i've never designed a pcb, so i couldn't say
@comino haha, yep
Chris Elsworth
@celsworth
anyone know what the max pwm frequency an esp can do?
Sven Eliasson
@comino
oh that was also on my research list ^^
Stavros Korokithakis
@skorokithakis
@celsworth 2 usec seemed fine
Chris Elsworth
@celsworth
that'd be.. 500kHz? I guess that will do :)
Stavros Korokithakis
@skorokithakis
yeah
Chris Elsworth
@celsworth
going to run it through a lowpass filter to make a DC voltage, 500k will be loads
Stavros Korokithakis
@skorokithakis
i used bit-banging to make the carrier wave for that remote control
if i wanted 26 usec highs, i had to delay for 24
so i'm guessing you can get 500 khz
actually sorry
1 usec
so probably 1 mhz
try it out, though, can't be too hard to write a for loop :P
beikeland
@beikeland
main downside to Eagle is you only get one sheet for the schematic. Board size and layers limitations hasn't been an issue yet. (unless you try to do panels, but there are other tools to do so). But it does sound like its time to look at KiCad again
Chris Elsworth
@celsworth
time for scope testing I guess
Stavros Korokithakis
@skorokithakis
@celsworth do you have a logic analyzer?
Chris Elsworth
@celsworth
only a cheap ripoff.. £15 from aliexpress thing
but yes
Stavros Korokithakis
@skorokithakis
hah, 15 quid? i got mine for $7 :P
Chris Elsworth
@celsworth
it was still a lot cheaper than a Saelae ;)
Stavros Korokithakis
@skorokithakis
but yeah, i was going to offer to check out the frequency if you didn't have one
i agree
i kinda feel bad though, their logic analyzer software is so good that i want to support them
maybe my next analyzer will be a saleae
Chris Elsworth
@celsworth
likewise, but they are very expensive :/
Stavros Korokithakis
@skorokithakis
eh, it's less than $100 i think
oh, $109
not prohibitively expensive, but yeah, it's not $7
Chris Elsworth
@celsworth
well, the 4 isn't.. very good :/
Stavros Korokithakis
@skorokithakis
oh? why not?