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Saturday, May 17, 2014

Printed Circuit Boards (PCBs)

Bittele Electronics provides high quality mixed technology PCB assembly services. Our circuit assembly capability includes Surface-Mount parts (SMD), Through-Hole parts (THD), or any mix of them. We also offer Prototype printed circuit boardservices, for rigid or flexible, RoHS compliant, High Tg boards.

Toronto-based contract electronics manufacturer Asian Circuits Inc. has expertise in providing affordable one-stopPCB manufacturing and assembly services for both Thru-Hole and Surface Mount Technology (SMT).

PCB and rubber

Printed circuit boards have copper tracks connecting the holes where the components are placed. They are designed specially for each circuit and make construction very easy.

Designing, Creating and Soldering your own PCBs
The website provides clear instructions on designing, creating and soldering your own PCBs.

Preparing a PCB ready for Soldering
  1. Clean off the protective coating from the PCB using a PCB rubber or steel wool so that all the copper tracks are bright and shiny. The PCB rubber has grit in it to make it very abrasive.
    In fact the coating can be left on and it should melt away around the joints as you solder but you may get better results by removing the coating.
  2. Drill the holes with a 1mm diameter bit. This is easiest with a proper electric PCB drill in a stand, but a hand-held miniature electric drill can be used if you take care to avoid twisting and snapping the small drill bit. Wear safety spectacles.
    A hand-drill is not suitable for such small bits unless you are very skilled.
  3. A few may holes may need to be larger, for example preset resistors usually need a 1.5mm diameter hole. It is simplest to re-drill these special holes afterwards.
  4. Check carefully to make sure you find all the holes.
    Even with experience it is easy to miss one or two!

WARNING! The small drill bits are fragile. Drill gently but firmly. If you are using a hand-held drill you must take great care to avoid twisting the drill sideways because this will snap the drill bit.