Author Topic: gainclones diy anyone? (Read 384906 times)

ATJr. · « **Reply #1740 on:** Jan 18, 2012 at 06:32 PM »

parang me tampo ano? sure the more variety to chose from, the better, panalo ang end user....

JojoD818 · « **Reply #1741 on:** Jan 18, 2012 at 06:47 PM »

sa symasym pa lang nakakahalata na kami, kaya lang may consensus na kailangan sundin so hindi naman natuloy. pero ok naman sila na madami ang variety to choose from kaya lang maingat sa pagpili.

parang pagiging mod lang yan, di ka pwede mag apply, you have to be picked.

ATJr. · « **Reply #1742 on:** Jan 18, 2012 at 06:53 PM »

gusto ni senor Carlos maging mod?

JojoD818 · « **Reply #1743 on:** Jan 18, 2012 at 06:56 PM »

hindi, si Andrew ang gustong gusto

hahaha!

si Charlie ang gusto maisama yun mga designs niya sa store...

ATJr. · « **Reply #1744 on:** Jan 19, 2012 at 06:53 AM »

Quote from: JojoD818 on Jan 18, 2012 at 06:56 PM

hindi, si Andrew ang gustong gusto hahaha!

si Charlie ang gusto maisama yun mga designs niya sa store...

oo nga, kung umasta sya parang mod, kaya nga nag post ako dun, ninominate ko sya.....

@squatt3r,

eto yung gainclone building thread sa kabila, posted by efren, http://www.electronicslab.ph/forum/index.php?topic=29231.100

JojoD818 · « **Reply #1745 on:** Jan 19, 2012 at 07:08 AM »

Quote from: TonyT on Jan 19, 2012 at 06:53 AM

oo nga, kung umasta sya parang mod, kaya nga nag post ako dun, ninominate ko sya.....

@squatt3r,

eto yung gainclone building thread sa kabila, posted by efren, http://www.electronicslab.ph/forum/index.php?topic=29231.100

daig pa ang bot pag nagbantay hahaha

markcrenz · « **Reply #1746 on:** Jan 19, 2012 at 07:26 AM »

Quote from: JojoD818 on Jan 18, 2012 at 06:47 PM

parang pagiging mod lang yan, di ka pwede mag apply, you have to be picked.

parang green lantern!

Quote from: squatt3r on Jan 17, 2012 at 07:25 PM

what do you mean sir markcrenz? mahirap gawin yung kit ni mauro?

as master jojo said, if this is your first build, basic muna.

squatt3r · « **Reply #1747 on:** Jan 19, 2012 at 09:33 AM »

makajoin nga dun sa kabila mukhang madami akong matututunan doon.

ATJr. · « **Reply #1748 on:** Jan 19, 2012 at 11:59 AM »

Quote from: squatt3r on Jan 19, 2012 at 09:33 AM

makajoin nga dun sa kabila mukhang madami akong matututunan doon.

mga techies ang mga tao doon....you will have more to gain....

squatt3r · « **Reply #1749 on:** Jan 19, 2012 at 01:12 PM »

kelangan ko pala ng session with Robert Boylestad.

JojoD818 · « **Reply #1750 on:** Jan 20, 2012 at 07:32 AM »

Quote from: markcrenz on Jan 19, 2012 at 07:26 AM

parang green lantern!

as master jojo said, if this is your first build, basic muna.

green minded sir hahaha

JojoD818 · « **Reply #1751 on:** Jan 20, 2012 at 07:40 AM »

Quote from: squatt3r on Jan 19, 2012 at 01:12 PM

kelangan ko pala ng session with Robert Boylestad.

sus kaya mo yan sir. what you need is an afternoon session with your chip's datasheet. I print it and instead of FHM or Playboy that's what I bring when I go to the restroom.

seriously, don't overload your mind all at once with so many circuits, basic lang muna then go on from there kasi aside from the skills you also need to develop a set of big cojones to build more complex designs.

dck22 · « **Reply #1752 on:** Feb 05, 2012 at 08:47 PM »

mga sir patulong naman po.
bumili ako kanina ng 24V 0 24V 6A na transformer and mga parts for LM3886TF gainclone

power supply pa lang di ko na mapagana

yung basic symmetric power supply na nga lang basis ko, meron paring nag susurge,
nung una umiinit lang yung mga diodes kaya tinatanggal ko kaagad, next try is may magic smoke na.
ano kaya cause nun?

eto po yung basis ko for power supply:
http://freecircuitdiagram.com/2008/08/28/basic-symmetric-power-supply/

yung mga diodes ko for rectifier is for 6A and up to 50V (6A05 MIC), yun yung binigay sakin sa deeco.

dun sa capacitor naman ginawa kong dalawa yung C2 and C4 10000uF 50V so bali apat na 10000uF.

normal po ba kapag tinest yung continuity ng power supply na may center tap is parang mag kakashort yung tatlo?

sakto naman po yung output nung transformer, chineck ko ang voltage AC niya without the circuit almost 25V, and pag both ends 50V AC naman.

ano po kayang problema? possible po ba na mali yung ginamit ko para sa rectifier diodes? and pwede ko pa ba gamitin yung mga diodes kahit uminit na? sa physical appearance ok na ok pa naman sya.

markcrenz · « **Reply #1753 on:** Feb 05, 2012 at 10:50 PM »

check mo mabuti yung layout mo at orientation ng parts kung tugma nga sa diagram.

diodes should be rated at least twice the transformer current para may allowance sa startup surge. your 10mF caps require huge currents during initial charging.

transformer windings have very low resistance. mahabang wire lang yan na nakaikot sa loob.

dck22 · « **Reply #1754 on:** Feb 06, 2012 at 05:23 AM »

Quote from: markcrenz on Feb 05, 2012 at 10:50 PM

check mo mabuti yung layout mo at orientation ng parts kung tugma nga sa diagram.

diodes should be rated at least twice the transformer current para may allowance sa startup surge. your 10mF caps require huge currents during initial charging.

transformer windings have very low resistance. mahabang wire lang yan na nakaikot sa loob.

thank you sir,

so dapat palitan ko na sir yung diodes ko? tatlong beses ko na syang inulit ganun pa rin

ok lang ba yung doble ang current and doble rin ang voltage?

ang masama pa ayaw dumikit ng soldering lead sa kanya, kaya ang ginagawa ko pinapaikutan ko
muna ng wire bago ko isolder.

markcrenz · « **Reply #1755 on:** Feb 06, 2012 at 06:02 AM »

Quote from: dck22 on Feb 06, 2012 at 05:23 AM

thank you sir,

so dapat palitan ko na sir yung diodes ko? tatlong beses ko na syang inulit ganun pa rin
ok lang ba yung doble ang current and doble rin ang voltage?

ang masama pa ayaw dumikit ng soldering lead sa kanya, kaya ang ginagawa ko pinapaikutan ko
muna ng wire bago ko isolder.

get the robust square metal bridge diodes, 200v 35a yata. scrape mo muna paa ng diodes, baka nag-umido during storage. better hone your soldering skills na rin. may tips sa web re proper soldering techniques, google mo na lang.

ATJr. · « **Reply #1756 on:** Feb 06, 2012 at 07:43 AM »

24-0-24, yung gitna ng traffo ang 0, yung 2 outer ang 24.....

yung 6A05 palitan mo ng 6A20 at least, rating of diode should at least be 3 x Vsec, or 3 x 48 ~ 150, diode must be rated for 200volts piv, peak inverse voltage...

dck22 · « **Reply #1757 on:** Feb 06, 2012 at 08:02 AM »

Quote from: markcrenz on Feb 06, 2012 at 06:02 AM

get the robust square metal bridge diodes, 200v 35a yata. scrape mo muna paa ng diodes, baka nag-umido during storage. better hone your soldering skills na rin. may tips sa web re proper soldering techniques, google mo na lang.

ok sir salamat po, pag may time mamaya baka makadaan po ako ng deeco
regarding sa pag solder nilagay ko kasi sa universal PCB e, kapag P2P technique po ba ilang gauge dapat
ng wire ang gagamitin?

another question sir, ok lang ba na isang supply lang sa 2 channel? and ok lang rin po ba kahit hindi na gumamit ng voltage regulator dun sa power supply?

by the way 250PHP lang sa deeco yung LM3886TF nila, nag tanong ako sa newport 350PHP.

dck22 · « **Reply #1758 on:** Feb 06, 2012 at 08:05 AM »

Quote from: TonyT on Feb 06, 2012 at 07:43 AM

24-0-24, yung gitna ng traffo ang 0, yung 2 outer ang 24.....

yung 6A05 palitan mo ng 6A20 at least, rating of diode should at least be 3 x Vsec, or 3 x 48 ~ 150, diode must be rated for 200volts piv, peak inverse voltage...

maraming salamat po sir, so mali po pala talaga yung ginamit kong diode?

JojoD818 · « **Reply #1759 on:** Feb 06, 2012 at 08:11 AM »

Quote from: dck22 on Feb 06, 2012 at 08:02 AM

ok sir salamat po, pag may time mamaya baka makadaan po ako ng deeco
regarding sa pag solder nilagay ko kasi sa universal PCB e, kapag P2P technique po ba ilang gauge dapat
ng wire ang gagamitin?

awg #18 pwede na pero ingat ka sa sobra haba na wiring, keep it short.

Quote

another question sir, ok lang ba na isang supply lang sa 2 channel? and ok lang rin po ba kahit hindi na gumamit ng voltage regulator dun sa power supply?

ok lang, wag mo muna problemahin yun, patunugin mo muna.

Quote

by the way 250PHP lang sa deeco yung LM3886TF nila, nag tanong ako sa newport 350PHP.

nakakasiguro ka naman ba diyan sa Php250 mo na LM3886TF?

dck22 · « **Reply #1760 on:** Feb 06, 2012 at 08:18 AM »

Quote from: JojoD818 on Feb 06, 2012 at 08:11 AM

awg #18 pwede na pero ingat ka sa sobra haba na wiring, keep it short.

ok lang, wag mo muna problemahin yun, patunugin mo muna.

nakakasiguro ka naman ba diyan sa Php250 mo na LM3886TF?

ok sir maraming salamat po.. hehehe

pano pong nakakasiguro sa LM3886TF? meron po bang fake nito?

dalawang beses ko pa tinanong yung
babae e kasi nagulat rin po ako na 250 lang.

JojoD818 · « **Reply #1761 on:** Feb 06, 2012 at 08:23 AM »

Quote from: dck22 on Feb 06, 2012 at 08:18 AM

ok sir maraming salamat po.. hehehe

wag ka muna pasalamat sir, paandarin muna natin power supply mo hehehe... bili ka na nun sinabi ni Tony na diodes bilis...

Quote

pano pong nakakasiguro sa LM3886TF? meron po bang fake nito? dalawang beses ko pa tinanong yung
babae e kasi nagulat rin po ako na 250 lang.

meron

dck22 · « **Reply #1762 on:** Feb 06, 2012 at 08:26 AM »

Quote from: JojoD818 on Feb 06, 2012 at 08:23 AM

wag ka muna pasalamat sir, paandarin muna natin power supply mo hehehe... bili ka na nun sinabi ni Tony na diodes bilis...

meron

PATAY

JojoD818 · « **Reply #1763 on:** Feb 06, 2012 at 08:32 AM »

lakasan mo ang loob mo, malay mo naka tiyempo ka naman ng mura...

ATJr. · « **Reply #1764 on:** Feb 06, 2012 at 11:52 AM »

walang report na fake lm3886tf na aware ako....at least dun sa site ni rod elliot.....last time, 3yrs ago, nagtanong ako sa eleshop, nasa 350 yan, mura din sa newport di ko lang alam ang price....teka...330 sa newport: http://www.newportelec.com/ic_l.html

s2kov · « **Reply #1765 on:** Feb 06, 2012 at 12:30 PM »

LM4780 chips na agad para twice the power ng LM3886!

JojoD818 · « **Reply #1766 on:** Feb 06, 2012 at 04:55 PM »

Quote from: TonyT on Feb 06, 2012 at 11:52 AM

walang report na fake lm3886tf na aware ako....at least dun sa site ni rod elliot.....last time, 3yrs ago, nagtanong ako sa eleshop, nasa 350 yan, mura din sa newport di ko lang alam ang price....teka...330 sa newport: http://www.newportelec.com/ic_l.html

bumili ako sa newport ng LM3914, pareho umusok. kaya pala kayudin lang ng fingernails ko natatanggal na yun label. ganun din sa 3875, parang pintura lang yun label. yun 1875 nila laser printing, so far so good.

JojoD818 · « **Reply #1767 on:** Feb 06, 2012 at 04:55 PM »

Quote from: dck22 on Feb 06, 2012 at 04:52 PM

diode nga po ang problema, bumili ako ng P60J kanina ayun gumana na..

ang kaso nung una +35V yung output ng positive and -35V naman ang negative,

after a while nung sinolder ko na mga connection, nagin +23V na lang yung positive,
pero -35V pa rin ang negative.. hayy ano na naman kay problema

malamang may capacitor na hindi naka-solder.

dck22 · « **Reply #1768 on:** Feb 06, 2012 at 05:04 PM »

Quote from: JojoD818 on Feb 06, 2012 at 04:55 PM

malamang may capacitor na hindi naka-solder.

salamat sir! yun nga, yung nasa ground hehe. hirap pala nito

pero enjoy

JojoD818 · « **Reply #1769 on:** Feb 06, 2012 at 05:14 PM »

Quote from: dck22 on Feb 06, 2012 at 05:04 PM

salamat sir! yun nga, yung nasa ground hehe. hirap pala nito pero enjoy

huwag mo masyado isipin yun hirap, isipin mo may natutunan ka. ayusin mabuti ang hinang, baka nakadikit lang ng kanin yan.

enjoy and good luck!