- Joined
- Nov 25, 2015
- Messages
- 9,594
bummer.
I was expecting to need to redo the board. Some engineers are really good at meticulously reviewing every last detail. I tend more toward the approach of plowing ahead with a test board, and making a few iterations to get there. In a corporate world it would be a matter of iteration cost vs the cost of reviewing everything meticulously. In the hobby sense, its just a questions of what I want to do and spend on it. First time I've built a circuit board with surface mount parts. Those .060" x .030" diodes are a pain to see the cathode markings and get them oriented right when soldering.bummer.
Yep.Respinning a board isn't a big deal usually.
My first surface mount design I used really small surface mount form factor going for maximum density. Like you it was very difficult to assemble the board by hand. Since then, I tend to use the largest form factor that is available for resistors and diodes. They are much easier to work with and are still very small compared to their thru-hole equivalents.Those .060" x .030" diodes are a pain to see the cathode markings and get them oriented right when soldering.
I managed to dodge that pitfall. I set 0805s as an easy default for resistors and caps. There are bigger sizes but 0805 is pretty easy for non-polarized parts. And even pretty easy for LEDs. Lot of diodes in SMA or SMB size packages. But tvs diodes, which I wanted to include on external wiring, are difficult to find in larger packages, so I'm stuck with 0603's for those at the large end, many are 0402 or smaller. I find I need to use a microscope, not just a magnifier, to see the polarity markings on those. Most of my chips are SOIC or TSSOP if I have to, I don't use flat packs.My first surface mount design I used really small surface mount form factor going for maximum density. Like you it was very difficult to assemble the board by hand. Since then, I tend to use the largest form factor that is available for resistors and diodes. They are much easier to work with and are still very small compared to their thru-hole equivalents.
many are 0402 or smaller
Looked at the other thread quick, but didn't spot the details. What sort of design were you doing for the bridge crane for the shop? (Curious, as I'm slowly working on the one in mine...)Which leads me to think I may want to go ahead and build out my bridge crane for my shop. Those who followed my shop build thread know I had plans for that.
Yeah, it's a fairly long thread. I dug through the whole thing and found the crane details for you. Look at the page before that one for a floorplan layout. Covering an area of roughly 38'x22' in a 12' ceiling. Probably end up with about 2500 lb capacity.Looked at the other thread quick, but didn't spot the details. What sort of design were you doing for the bridge crane for the shop? (Curious, as I'm slowly working on the one in mine...)
Dan