<wpwrak>
(http://blog.p-dev.net/) seems that he's trying to do about the same thing, BTLE-wise, i'll eventually be after
porchao has quit [Quit: Leaving...]
<nicksydney>
got the parcel from taobao.com
<nicksydney>
will post few pictures
<nicksydney>
overall exprience with taobaoring.com was very good ... except 1 thing i noticed when I received the RA8875 chip it was outside of it's plastic container which i think was a mistake from their side as they did not wrap full plastic proplery
jluis has quit [Remote host closed the connection]
pcercuei_ has joined #qi-hardware
pcercuei has quit [Ping timeout: 252 seconds]
jekhor_ has joined #qi-hardware
jekhor has joined #qi-hardware
jekhor has quit [Read error: Connection reset by peer]
jekhor_ has quit [Ping timeout: 276 seconds]
<wpwrak>
nicksydney: the etching is a bit rough but the board should be quite usable. good progress !
<wpwrak>
Luke-Jr: define "usable" :)
<Luke-Jr>
wpwrak: routable IPv6 link? ☺
Luke-Jr has quit [Ping timeout: 245 seconds]
jekhor has joined #qi-hardware
woakas has quit [*.net *.split]
woakas has joined #qi-hardware
Luke-Jr has joined #qi-hardware
xiangfu has joined #qi-hardware
Luke-Jr has quit [Ping timeout: 260 seconds]
Luke-Jr has joined #qi-hardware
xiangfu_ has joined #qi-hardware
xiangfu has quit [Ping timeout: 258 seconds]
xiangfu has joined #qi-hardware
xiangfu_ has quit [Ping timeout: 240 seconds]
jekhor has quit [Ping timeout: 252 seconds]
xiangfu has quit [Remote host closed the connection]
rz2k has quit [Remote host closed the connection]
pcercuei_ has quit [Ping timeout: 240 seconds]
viric has quit [Ping timeout: 252 seconds]
<nicksydney>
wpwrak: got a question
<nicksydney>
managed to soldered all the component
viric has joined #qi-hardware
<nicksydney>
this is the schematic http://postimg.org/image/alfjpod1n/ .... what i've used different is wpwrak R1 i don't have 150K so i used 100K while the rest are still the same D1, D2 and D3 I've used Schootky Rectifier 500ma 30V and i use the the input voltage (using battery) at around 5.6V and I'm getting reading of 28V
<nicksydney>
according to datasheet http://postimg.org/image/4nx1cd8gb/ with the formula stated that i calculate i should be getting around 13V but i'm getting 28V am i missing something or is it because the diode is rated at 30V ?
pcercuei has joined #qi-hardware
<wpwrak>
diode rating only determines how high it can go
<nicksydney>
damn it! so that means I've done something wrong
<wpwrak>
then the temperature of your iron was too low
<wpwrak>
you had trouble getting the tin to liquify, didn't you ?
<nicksydney>
yeah the iron was at 350C
<whitequark>
whoa
<wpwrak>
350 C should be plenty
<wpwrak>
but maybe what you set isn't what it does :)
<nicksydney>
yeah perhaps this is china soldering station so can't trust it too much
<wpwrak>
did you have trouble getting the tin to liquify ? despite these 350 C
<nicksydney>
since i don't have osc what's best way to debug the problem ?
<nicksydney>
yeah it was bit slow to liquify
<wpwrak>
one hint: always have a bit of tin on the tip of the iron, that will conduct the heat
<wpwrak>
(slow) so i read the scratch marks right ;-)
<wpwrak>
can you set the iron hotter ?
<nicksydney>
the max is 480 so can set to max
<wpwrak>
well, try that
<wpwrak>
solder joints should be smooth
<wpwrak>
your look as if you had tossed liquid metal into water
<wpwrak>
now, i don't know whether temperature is your problem or something else
<wpwrak>
so you may burn up something at 400 C. i hope you have spare parts :)
<nicksydney>
so you mean the problem could be because of solder joint ?
<wpwrak>
the soldering is sufficiently chaotic that i can't tell whether you have connections or not
<wpwrak>
and of course, say, R1 is not connected, you can get pretty much anything
<wpwrak>
speaking oif which, where is R1 ?
<nicksydney>
the one that says 103
dos1 has joined #qi-hardware
<wpwrak>
and the one that says is 104 ?
<nicksydney>
that's 100K
<wpwrak>
err, the one that says 104 is R2 ?
<nicksydney>
R2
<nicksydney>
yeah
<wpwrak>
so R1 is 10k and R2 is 100k ?
<wpwrak>
and now 150k/10k as in the schematics ?
<nicksydney>
sorry R2 the one with 103 and R1 is with the one 104
<wpwrak>
so you should get about 13.6 V
<nicksydney>
yeah that's what i thought but i'm getting 28V :(
<nicksydney>
crap ! :(
<wpwrak>
what's that white thing ? C2 ?
<nicksydney>
yeah that's 22pf
<wpwrak>
can you measure the resistance across the resistors ? could be that one is shorted
<wpwrak>
measure in both directions. the more correct result is the higher of the two
<wpwrak>
also, since you have large capacitors, wait until the measurement stabilizes
<nicksydney>
the 103 resistor reads 1.23
<wpwrak>
kOhm ? or Ohm ?
<nicksydney>
104 reads 11.28
<nicksydney>
R2 = 103 = 10K
<nicksydney>
R1 = 104 = 100K
<wpwrak>
did you measure each both ways ? i.e., flipping the probes ?
<nicksydney>
yup
<wpwrak>
both readings are surprisingly low. especially that of R1
<wpwrak>
but the readings were kOhm ? 1.23 kOhm and 11.28 kOhm ?
<wpwrak>
ah, and don't measure at the chip directly. measure on the adjacent traces.
<nicksydney>
hang on you mean measure the voltage across the resistor ?
<wpwrak>
no, the resistance
<nicksydney>
oh sorry that was the measurement for the voltage...let me do again
<wpwrak>
and of course, with power and load disconnected
<nicksydney>
ok no battery
<wpwrak>
and nothing on the output either
<nicksydney>
ok for R2....i switch the multimeter knob to 20k and the reading i get 9.8
<wpwrak>
excellent
<nicksydney>
and for R1 the multimeter knob is on 200k and the reading i get 2 different reading....68 and 92/93
<nicksydney>
2 reading with different switch probe
<wpwrak>
okay, that's also good
<wpwrak>
the 68 kOhm probably includes current going through the diode
<wpwrak>
you can now search for flaws further away from the components. test conductivity across the same net ("wire" in kicad) from component pin to component pin
<wpwrak>
e.g., TPS1.SW(1) to D1.A, L1.left, usw.
<wpwrak>
maybe something isn't connected
<wpwrak>
if you see a possible short, also check that
<nicksydney>
ok i'll try that
<wpwrak>
also, don't spend too much time trying to fix it. sometimes something weird goes wrong. then it's often easier to just make a new board.
<wpwrak>
(and you can improve your soldering in the process, too :)
<nicksydney>
how do you measure capacitor to see if it is functioning properly ?
<nicksydney>
using this picture http://postimg.org/image/ujvf4e1lv/ if i put the GND of multimeter to GND of batter and the red probe I touch the other pad (red circle) i get reading of 13.60 while if i move the red probe to the blue circle i get reading of -14.9
<nicksydney>
could it be i measure it in the wrong location ?
<nicksydney>
hmmm..14.9 + 13.6 approx 28.5
<nicksydney>
wpwrak: what you think ?
Luke-Jr has quit [Ping timeout: 245 seconds]
Luke-Jr has joined #qi-hardware
<wpwrak>
hmm, the right point is your negative outout
<wpwrak>
so the first one should yield about 2*13.6 V
<wpwrak>
so it appears that your circuit is working after all. you just have to measure correctly :)
rz2k has quit []
jekhor has joined #qi-hardware
wolfspraul has quit [Quit: leaving]
jekhor has quit [Ping timeout: 265 seconds]
Luke-Jr has quit [Excess Flood]
Luke-Jr has joined #qi-hardware
sb0 has quit [Quit: Leaving]
ysionneau has quit [*.net *.split]
whitequark has quit [*.net *.split]
rodgort has quit [*.net *.split]
nicksydney has quit [*.net *.split]
lilvinz has quit [*.net *.split]
Guest7061 has quit [*.net *.split]
rodgort has joined #qi-hardware
whitequark has joined #qi-hardware
ysionneau has joined #qi-hardware
nicksydney has joined #qi-hardware
Guest7061 has joined #qi-hardware
lilvinz has joined #qi-hardware
Luke-Jr has quit [Ping timeout: 260 seconds]
Luke-Jr has joined #qi-hardware
<nicksydney>
wpwrak: when you say negative output which one ?
<nicksydney>
wpwrak: for sanity sake can you tell me whether this is correct and i'm doing it the right way ......... this picture http://postimg.org/image/p45xrpjzn/ with the setup described on the pic i get +13.60v ... this picture with the setup described http://postimg.org/image/k8trzrsxt/ i get -14.9V and last with this picture with the setup described in the picture http://postimg.org/image/ffomxgnxz/ i'm getting 28v
<nicksydney>
was chatting with you at 2am don't know whether i was awake or asleep so thought of doing it with the description in the picture to make it easier for me to stay sane :))