how to make PCB layout

[Ikasamoko]

nagtatanung ka kasi ng soft sa pcb design na mas mabilis na makuha lang ng 20min...eh walang ganun..nasa gumagawa yan...regardless of design software na gamit...

saka kung mitikulosa ka at maraming burloloy at maarte sa pagawa..mas matagal..
 

[x13r_kit_0]

nagtatanung ka kasi ng soft sa pcb design na mas mabilis na makuha lang ng 20min.....
 

sa lahat ng trabaho pag di pa kabisado..di magagawa agad ng mabilis.. ,alam yan ng karamihan
baka mali lang po siguro approach mo..,sori kung mali tanung ko master..peace

nagtatanung ka kasi ng soft sa pcb design na mas mabilis na makuha lang ng 20min...eh walang ganun..nasa gumagawa yan...regardless of design software na gamit...

saka kung mitikulosa ka at maraming burloloy at maarte sa pagawa..mas matagal..
 

agree ako nasa tao talaga yun.

[akhen]

sabi ko na nga ba ares pa din yan e... nice nice... malaki pala masyado yung clearance ko 20 mil tapos 35 mil yung trace...

try ko next time yung smaller traces... thanks ganda mo talaga...

[Ikasamoko]

iyan kasi post mo sis oh...

sana may magshare ng software nyan...

kwento sakin 1 hour nila ginagawa tapos na..,pero
kay boss don martin 20 mins lang..,,hehehe..,mas maganda ata yun mas mabilis proseso.

kaya sabi ko wala sa software yan na mabilis mag process nasa designer pa rin...

[TinTopHack]

hindi naman, dapat lang hindi 90 degree 'yung liko. ang ideal, circular, pero pwede na rin 'yung 45 - 45 degrees.

marami pang consideration pagdating sa high speed and microwave, kapag lumiko meron 'yung tinatawag na equal length, mag-iiba kasi 'yung travel ng kuryente dahil nagbabago 'yung width.

parehas lang 'yan. parehas merong considerations. pagdating sa high speed digital (think computer motherboard), kailangan na ring i-consider 'yung routing methods for Microwave and RF circuits, controlled impedance lines, balance lines, etc. actually, pagdating sa ganyang layouts (high speed digital, 1GHz and up), mas complex ang digital dahil mas madaling mag-introduce ng jitter sa square signals, unlike sa RF na madalas sinusoidal ang signals. sa square signal digital kasi, 1GHz will contain odd harmonics, 3GHz, 5GHz, 7Ghz, 9GHz, 11GHz, etc. kapag merong hindi na-consider diyan sa design, ayun, jitter na kaagad.

kaya meron pang Eye Diagram na ginagawa for this designs. parang ganito:



'yung isang kasama ko ngayon galing sa PCB design company. maraming restrictions 'yung motherboard design, merong strict length at balanced lengths na sinusunod per trace.

Agree. Pag hi-speed digital na, you think in terms of analog signals. At this level, a lot of manual routing is needed.

PCB design is both a science and an art. Science because you have to consider the effects of your layout, traces, shapes, etc on the signals going through them. Even a simple audio amp if not laid out well can oscillate. When doing layouts for SMPS with high voltages, you have to consider clearances, creepage distances for safety reasons and impact on EMI generation. It is an art because the final layout has to look good too.

This may sound daunting but don't be intimidated. Once you have the foundation, the software tools will make things easy onwards. Bottom line it is not the software tool but the designer that controls the end results.

[nucleus]

tanong ko lang mga master, nabanggit nalang din yung computer mother boards, madalas akong makakita ng traces na sadyang pinahaba, (inductor sa pcb?) parang bituka ng manok anong purpose non?

[rdpzycho]

Yan yung curly traces na binanggit ni sis marce. Kailangan siyang gawin par parehas ang length nung balanced linne. Try mo sukatin ng simulid, dapat ilang mils lang ang difference nung magkatabing trace.

[_basura_man()]

mabilis kasi signal na dumadaan dyan sis nuke para sabay yung signal,critical yung timing.

[Born2BeWired]

Ay, akala ko yan ang gawain ng mga naglalayout na bading. 

[pete]

Ay, akala ko yan ang gawain ng mga naglalayout na bading. 

hehehehe

[rdpzycho]

Ay, akala ko yan ang gawain ng mga naglalayout na bading.  

 

mabilis kasi signal na dumadaan dyan sis nuke para sabay yung signal,critical yung timing.

galing mo talaga sis. small fractions of a second difference, ang laki ng effect sa ganitong high speed.

[Mayalin22]

yari si pendot the ts 

[Ikasamoko]

Ay, akala ko yan ang gawain ng mga naglalayout na bading. 

baklita ka talaga..anu akala mo sa layout na curly? palamuti at burluloy? lol!


BTW anung soft maganda gamitin sa curve traces also support teardrops creation...

[pEN DoTA]

20mil trace / 13mil clearance
proteus pa din gamit ko for schema capture and pcb routing.

thanks master. pag-aralan ko ung proteus na yun... kulang pa ako ng 8 pogi master. hntayin mo lng.

[Born2BeWired]

baklita ka talaga..anu akala mo sa layout na curly? palamuti at burluloy? lol!

Turo sa akin ni 7string yan! Sabi ko na nga ba, mali na naman ang ituturo sa akin nun eh!

Yung talagang theory ko is, pampahilo yan sa electron, para pagdating sa dulo, hilo at mahina na. Yun na nga, pampahina ng signal.

[akhen]

[Born2BeWired]

Seriously, the prime purpose (reason) is as what ate rdp and ate spectrum already mentioned : to compensate for signal propagation delay that may cause clock skew. But you should to this with care. For one, you have to make sure this type of routing must be done only over a ground plane. Otherwise, it will buy you more trouble than what you bargained for. Following is a short list of unwanted effects you should be aware of:

- Increased cross talk. Two inductors in close vicinity will act as transformers. This will make (unwanted) signal coupling more likely.
- Increased RFI (Radio Frequency Interference). Curly trace results to an increased in loop area. You really don't want large loop area because you are in effect making a more efficient radiator (antenna) of RFI.
- Increased SWR (Standing Wave Ratio). If you are not careful enough to consider the transmission line effects of the PCB trace, you will be cursed with these nasty signal reflections that may cause more trouble than the clock skew you have been trying to cure in the first place.

If you don't want to deal with these potential problems, then use a delay line instead.