Author Topic: Aruy... baket uminit ang pcb namen? (Read 1240 times)

zinckingeye · « **on:** September 15, 2010, 07:35:10 PM »

kua. anu ang possible na problema kung halimbawa tama naman ang pyesa at pati ung specs... kaso malakas ang current na pumapasok sa circuit.. ang nakapagtataka lang eh. imbes na ang components ang masira, ang PCB copper ang nasusunog at napuputol. madalas po eh sa GND nangyayare ang putol...

bale ito ung project namen http://www.electronicslab.ph/forum/index.php/topic,19517.msg336454.html#msg336454...

Philippine Electronics Forum · « **on:** September 15, 2010, 07:35:10 PM »

labgruppen · « **Reply #1 on:** September 15, 2010, 08:39:11 PM »

baka masyadong manipis ang "width" nung pcb tracks nyo.. for high current carrying traces, use wider tracks. "tinning" the tracks with solder also helps. you can search the internet for references on how wide a pcb track must be for a certain maximum current.

Philippine Electronics Forum · « **Reply #1 on:** September 15, 2010, 08:39:11 PM »

rdpzycho · « **Reply #2 on:** September 15, 2010, 10:08:57 PM »

^ agree.

kung wala na talagang pwesto (though dapat priority) para pakapalin 'yung trace, pwedeng patungan ng copper wire or 'yung ginagamit na desoldering wick.

Philippine Electronics Forum · « **Reply #2 on:** September 15, 2010, 10:08:57 PM »

zinckingeye · « **Reply #3 on:** September 17, 2010, 07:06:17 PM »

ito pa ung new problem ng relay namen... even na naka logic 0 ung relay(relay is inactive) still mayroon pa rin kuryenteng dumadaloy sa relay(logic 1).

Philippine Electronics Forum · « **Reply #3 on:** September 17, 2010, 07:06:17 PM »

zinckingeye · « **Reply #4 on:** September 17, 2010, 07:19:28 PM »

kua tama po kau...sa dalawang sira ng pcb namin, madalas pumutok ang small traces ng GND...

Philippine Electronics Forum · « **Reply #4 on:** September 17, 2010, 07:19:28 PM »

rdpzycho · « **Reply #5 on:** September 17, 2010, 10:39:06 PM »

^ dapat ibabase niyo rin 'yung thickness ng PCB traces niyo sa dumadaang current, parang wiring din 'yan sa bahay or kahit anong wiring na may dumadaang kuryente.

RaffT · « **Reply #6 on:** September 17, 2010, 10:43:51 PM »

anu ba load nyo sa relay? wheelchair DC motor? at dumadaan pa sa PCB traces ang connection?

don_pulube · « **Reply #7 on:** September 18, 2010, 11:37:14 AM »

short circuit po yan.. check niyo ulit ung pcb connections tapos kaskasin ng liha na pino tsaka tiyakin na walang magkadikit sa pagitan. gamit kayo cutter

zinckingeye · « **Reply #8 on:** September 18, 2010, 05:34:38 PM »

Quote from: BrAiNs on September 17, 2010, 10:43:51 PM

anu ba load nyo sa relay? wheelchair DC motor? at dumadaan pa sa PCB traces ang connection?

12a load, 12v motor, at dumadaan nga po sa PCB.... gamit kami ng bosch 30a relay...

rdpzycho · « **Reply #9 on:** September 18, 2010, 10:27:13 PM »

^ 12A?

makapal na trace kailangan niyan. mas maganda pang i-wire niyo na lang kung ayaw niyo i-compute 'yung required thickness nung conductor.

Gwenda · « **Reply #10 on:** December 24, 2011, 11:48:16 AM »

Matagal na itong topic na ito pero I would like to put in my 86 centavos worth (2 cents sa exchange ngayon). I would NOT trust 1 amp sa printed circuit board na benta dito sa Pinas. Has anybody checked the thinckness of the copper on these PCBs? Baka half ounce lang or less!!!

When designing a PCB, kung mataas ang amps gawing external wire na lang. 12 Amps! gagamit ako ng no less than 18AWG wire. Kung mataas ang duty cycle baka 12AWG wire pa lalu na at DC.

Johannah Aleksandria · « **Reply #11 on:** December 24, 2011, 02:05:07 PM »

Tama ka. Pero may nabibili pa ngayon na PCB na makapal, gaya nung mga kulay itim at parang may thread ang loob. Yung mga brown wala na akong nakitang makapal. Meron pa ngayon manipis ang plastic at manipis ang copper.

Philippine Electronics Forum · « **Reply #11 on:** December 24, 2011, 02:05:07 PM »

Philippine Electronics Forum