Doctor PCB: 2010

Sunday 10 October 2010

What is the difference between PTH and TH?

In general language, in our daily life its called holes.

But when it comes to PCB. It become technical and that mean we have to be careful and understand what it is actually.

In PCB world holes are two types

Plated Through holes. Also knows as PTH. :- resistor, capacitor, inductor, transformer, header, connectors etc. Need that kind of holes. In plated through holes we have copper running around the hole. Refer below picture. Yes, via holes comes in the category of PTH.
Through holes:- They are simple holes. We need those kind where electrical conductivity is not required. Some components have mounting provision made of plastic. In PCB we just made provision to lock / fix the component.

Tuesday 26 January 2010

List of companies selling electronic components online in india

Below is the list of Company I have collected while working in this field. All these are selling electronic components and they are Indian Based Company. (Including two International ).

International

Digi-Key Corporation – Electronic Components Distributor Since 1972 USA Based Company ( located at: Thief River Falls, Minnesota, USA )

Mouser Electronics Since 1964 USA Based Company ( Located at: Mansfield, Texas, USA )

Vishay Intertechnology Inc Since 1962 USA Based Company ( Located at: Malvern, PA, USA) They are manufacturer of rectifiers, diodes, MOSFETs, optoelectronics, selected integrated circuits, resistors, capacitors, and inductors.

Indian

Enerdyne Devices (P) Limited Since 1993 Indian Based company but trading all components from Japan, Taiwan Switzerland ( Located at: Noida ( Delhi NCR)) To download broucher click here

http://thinklabs.in/ --- more of a training institute

http://www.rkelectro.com

http://www.singodia.com/ --- bulk selling

http://www.onlinetps.com/ --- looks cost effective, comparatively more items

http://www.nex-robotics.com/ --- looks like the second best

http://aplusindia.net --- voice, melody ICs

http://www.discoverprojects.com

http://www.sunrom.com/ - more items but comparatively priced higher

http://www.nskelectronics.in --- looks cost effective

http://www.bhasha.co.cc/

http://www.simplelabs.co.in/

http://www.rhydolabz.com/ ---- feel costly

http://9circuits.com/products/ ---- minimum

http://www.pearllabs.com/ --- nothing

http://www.catsystems.in/ --- minimum

http://www.embeddedmarket.com/ --- feel costly

http://www.tenettech.com --- feel costly

http://feemo.in/ --- few items

http://www.thinnkware.com --- few items interesting

http://www.metalmateinc.com --- interesting robots – robots only

http://www.probots.co.in/ ---- ok, making PCB also, more items, cost effective

http://www.kitsnspares.com --- minimum interesting, but you can take part no from element14 and order here

http://www.tenettech.com

http://shop.extremeelectronics.co.in

http://www.dnatechindia.com – some project boards

http://www.protocentral.com/ - Arduino, robotic related

http://shop.sumeetinstruments.com/ - Arduino, robotic related

http://www.hobby2go.com - more variety of items, price seems to be ok

http://www.ventor.co.in - Contributed by SR

http://www.elevogue.com/ - Contributed by Nilesh

http://www.digibay.in/ - Limited items, reasonable price

http://www.mgsuperlabs.co.in/estore -

http://www.electroncomponents.com/ -

http://estore.digxtech.com/ -reasonable collection and cost, based in Cochin

http://www.roboshop.in/ - based in Noida

http://www.technofreek.com/ - Limited items, reasonable price, based in Bangalore

www.sonlineshop.com - Reasonable collection & price, based in Coimbatore

http://hacktronics.co.in/ - Comparatively more items, based in Bangalore

www.frugal-labs.com - Limited items, based in Bangalore

www.evelta.com - Limited items, based in Mumbai

www.anandtronics.com - Limited items, based in Chennai

www.componentsindia.com - Limited items

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