rules and regulations in pcb deisgning?

[e172ece]

mga sir mam

meron po ba rules and regulations sa pagdedesign ng pcb?

like sa oscillator kailangan malapit siya sa mcu for effieciency ng clock

yun kapal or kitid ng lines

kapal kitid kapal ulit okay lang po?

no bearing po ba kung kinakapalan yun mga copper?

express pcb po kasi gamit ko,

as much as possible kinakapalan ko lahat.

okay lang po ba yun?

[rdpzycho]

^ dalawa ang main rules na dapat mong alalahanin. long traces, and distant return lines will create inductance. parallel plates (on multi-sided boards) will create capacitance.

kapal - depende sa current kung power line. kung RF depende sa computation ng transmission line. kapag nagde-design ako, power traces lang ang karaniwang makapal, mas mahirap kasi control-in ang return lines kapag makapal.

[e172ece]

anu po ibig sabihn po neo dito po
long traces, and distant return lines will create inductance. parallel plates (on multi-sided boards) will create capacitance.
di ko po magets eh thanks po

[anthonydp]

if you'll be designing pcb for ac-powered consumer products, you'll may be interested in this safety standards:

IEC-60065:

Clause 13 - clearance and creepage distance
Clause 14 - components (14.1 - resistors, 14.2 - capacitors & rc circuits, 14.3 - inductors & windings)

[motion55]

anu po ibig sabihn po neo dito po
long traces, and distant return lines will create inductance.

Let us say one wire carries signal to the load while the other wire carries the current returned from the load to complete the circuit.



The current through the wires will induce a magnetic field. Since the currents are flowing in the opposite direction, the magnetic fields will tend to cancel each other if they are as close as possible. The lower the induced magnetic field, the lower would be the inductance.

Also the longer the wires the more magnetic field lines will be induced. And so keeping the wires short will lower inductance.

parallel plates (on multi-sided boards) will create capacitance.
di ko po magets eh thanks po

Parallel plates on double sided boards act like capacitors.

[e172ece]

if you'll be designing pcb for ac-powered consumer products, you'll may be interested in this safety standards:

IEC-60065:

Clause 13 - clearance and creepage distance
Clause 14 - components (14.1 - resistors, 14.2 - capacitors & rc circuits, 14.3 - inductors & windings)

kung d.c. lang po

anu po yun clearance saka cleapage?

[anthonydp]

kung d.c. lang po

anu po yun clearance saka cleapage?

to answer your question, it's better to read this so that you may learn the reasons for the values you asked:

Calculating Creepage and Clearance Early Avoids Design Problems Later
Audio Power Amplifier Design Handbook (from Google Books)

generally, kung low-voltage, low-current, there's no special safety requirement for pcb conductor distances except air clearance from conductors carrying ac-voltages.   this only pertains to safety.

[marleona]

may file ako nung PCB designing eh.... hmmmm, hanapin ko muna baka makatulong.

[marleona]

Meron akong mga list ng sites hehehe. pwede bang ipost dito.... pero sige lagay ko na...
http://www.pcbdesign.org/pcb-layout/
http://www.expresspcb.com/ExpressPCBHtm/Tips.htm
http://www.mitsi.com/pcb/Hints/tips.htm
http://www.universal-mfg.com/pcb-design-tips.html
http://pdcamerica.com/guidelines.htm
http://www.pcbpro.com/pcb-design-tips.php
http://www.smps.us/pcb-design.html
http://www.analogzone.com/acqt0707.pdf
http://www.eee.metu.edu.tr/~design/pcb.htm
http://www.olimex.com/pcb/dfm.html
tips on pcb design
http://www.pcbmatrix.com/forum/forum_topics.asp?FID=24   

[e172ece]

to answer your question, it's better to read this so that you may learn the reasons for the values you asked:

Calculating Creepage and Clearance Early Avoids Design Problems Later
Audio Power Amplifier Design Handbook (from Google Books)

generally, kung low-voltage, low-current, there's no special safety requirement for pcb conductor distances except air clearance from conductors carrying ac-voltages.   this only pertains to safety.

thanks one pogi point for you

[e172ece]

thanks po sa mga nag reply!