Moderators: Dave Moll, Andrew Davie, Steve Anderson
Steve Anderson wrote:When you get the next batch of boards check that everything is connected to what it should be and not to what it shouldn't before stuffing components. Most multimeters have a continuity/buzzer function that allows you to check through this quite rapidly. It's a worthwhile investment in time and sanity.
Steve A.
Andrew Davie wrote:I thought it might be interesting to have a go at the club circuits (analog) and get those into Eagle too, so there's a simple gerber file for anyone to print. Wouldn't be too much work. Also, could combine the boards onto a single mega-board easy enough. Will consider.
Steve Anderson wrote:Andrew Davie wrote:I thought it might be interesting to have a go at the club circuits (analog) and get those into Eagle too, so there's a simple gerber file for anyone to print. Wouldn't be too much work. Also, could combine the boards onto a single mega-board easy enough. Will consider.
Yep, that would be worthwhile. But before actually going ahead it may be worth updating the existing circuits. e.g. the sync separator board uses three CA3140 chips, this could be changed to one CA3140 and one CA3240. This reduces board size, soldering and reduces the cost slightly. There are other items that could be reviewed too, more modern and smaller smaller capacitors for example. But everything still through-hole, no surface-mount.
I believe Klaas did most, if not all, of the design, it would polite to run any changes past him first.
Steve A.
Klaas Robers wrote:I made the circuit boards using "Paint" to make the masks. Mainly "copy and past". Design one IC-pad, copy it x 16 and we have an IC line-out. First there is a rough plan on paper, then it continues in a .bmp file.
Al boards are single sided, no plated through holes. Even with a PIC on the board we needed few connection wires. See the boards for Karen's projects. That makes them cheap, altough they could be slightly smaller in size when double sided and costly plated through. And .... members can do the drilling of the holes themselves.
Andrew Davie wrote:
Understood, though you can't really beat $5 for 10 boards + shipping ($9) for pcbway.com with double-sided and "professional" double-sided manufacturer with plated-through holes, silkscreen, etc. I think the days of sticking to single-sided and drill-your-own holes are probably numbered. With shipping included, just $1.40 each.
Andrew Davie wrote:I corrected and sent off the board for printing and the feedback is all now OK.
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