| Electronics > Beginners |
| Copperclad FR4 |
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| Zero999:
I've done a similar thing before, but with a knife. It's much better than strip-board for high current circuits. |
| bd139:
Yeah stripboard is basically made of fuse wire. Many a bit did I set fire to as a kid :) |
| T3sl4co1l:
--- Quote from: KL27x on May 19, 2019, 09:11:58 am --- --- Quote --- a 1/4"-wide strip has an impedance of something like 10 ohms, great for longer distance gate drives for example. --- End quote --- Dunno what you think I'm using. It's 'posedly used for RF shielding and the like. The copper comes in standard thicknesses. I have had it in 1/2 oz and 1 oz pour copper thickness. 0.007" is the total thickness which includes the same copper layer as typical PCB's. I imagine a 1/4" wide track in 1 oz copper would be several meters before you would record 10 ohms? --- End quote --- Sorry, characteristic impedance, as a transmission line. --- Quote ---If you are using high enough voltage, I'm sure you could short across the air gap left by Manhattan islands. I supposed, high enough, and you could arc through the FR-4. Anything low voltage, I imagine would be fine. Around 6 thou clearance "between traces" is not particularly remarkable. I've never had a short or arc. --- End quote --- I just mean it's not much distance for a stray goober of solder, or a fleck of metal, to cover. Manhattan style pads can get quite thick with solder as you move things around, and you can drain that off the top, onto the surrounding board, but you have to be that much more careful you aren't leaving a tiny web shorting across. Incidentally, I've seen a 4-layer ExpressPCB board used to prototype an industrial inverter. That's 7 mil prepreg and the designer forgot to set internal clearance other than 7 mil. Amazingly, most of those boards survived 650V, only one or two failed in the laminate! OTOH, I had a job where they insisted on 40 mil internal clearance for 1.5kV transient rating only, and I can't possibly seem to make them understand that their outer dielectrics are only 20 mils thick... Tim |
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