| ??? 08/20/09 21:45 Read: times |
#168416 - With a few work arounds? Responding to: ???'s previous message |
Thanks for the elaborate reply Per.
Per Westermark said:
When making resistors smaller, they will support less power before overheating, so you must check the power for each used resistor. When making capacitors smaller, they support less voltage. Correct me if I am wrong, but I have seen some hole mounted resistors and capacitors being used in real life PCBs. Especially older PCBs. Probably because their size is small enough already. Perhaps if I am not going to use a great many of them, it would be OK to go ahead with the hole mounted ones. This would reduce the extra cross verification effort. Are the surface mounted ICs also inferior to the hole mounted ones in performance? Are surface mounted PCBs available without bulk orders? Per Westermark said:
A number of transistors and IC will have special pads that must be soldered to the PCB for using the PCB as a heatsink. I guess this requires specialised equipment. I hope there are shops that do that for you. Per Westermark said:
If not using a standard casing, you ask a designer to use CAD software .... then contact a plactic factory to design the tools for making the box based on the blueprints. I guess I can’t use a standard casing. So I will have to go for a CAD design. Per Westermark said:
Not sure what you mean about testing......... I mean, other than the core functionality of the product, are there standard test situation circuits are subjected to during testing; eg, behaviour under unstable power supply, life of the product, sturdiness etc. Per Westermark said:
design test equipment that will automatically test all critical parameters..... so you can find if there are bad solder joints, solder connecting two nearby pads, a missing component etc. This is completely new to me. Could you please provide a link where I could get more information? Or at least the Google-able terms that could get me real info. Thanks for your reply again. |
