On 7 February 2011 13:44, RussellMc wrote: >> I already went ahead made the changes Olin suggested earlier today, >> but I kind of liked the diode labels the other way too. Whatever, it >> doesn't matter to me.. > >> First schematic: >> http://www.roboticsguy.com/images/misc/balancing_robot/balancing-robot-b= oard-schematic-r8.png >> New schematic: http://www.roboticsguy.com/images/misc/balancing_robot/ba= lancing-robot-board-schematic-r9.png >> >> Is that better? > > No. > Certainly not. > It's different. > An it has the important aspect of Olin having been able to arbitraily > impose his will on someone and get them to change something from > "entirely OK as was if not actually 'perfect'" to "probably OK as is > but shows Olin is important". > > D1-D* are fine as they are now shown - and were fine as they were > previously shown. > > I dislike the way the resistors are now labelled and I would probably > never do it that way myself. BUT that way is fine, certainly nothing > I'd consider complaining about and may be useful in some cases. I do > not consider that either change contributed in any significant way to > the readability of the drwaing. And, that has NOTHING to do with the > fact that the change was made to meet Olin's perceptions. They were > just unnecessary make work which are a matter of personal preference > (and maybe of olin's mind wiring). > > Noting that Vcc must not be less than Vdd may be useful. It usually > wouldn't be, but it could happen. > If Vcc < Vdd then D1-D8 need to be returned to Vcc or someother > suitable point / circuit. > > > > =A0Russell. > My only comment would be a pet hate of D1-D* being connected at the crossover point. I far prefer to see no more than 3 connections at a node on the circuit as the way it is presented here only needs a small dot to be added to make it indistinguishable from wires crossing but not joining. Another thing I might add is a note to minimise the loop caused by the crystal capacitors to the ground pin of the IC (Pin8) and that the decoupling capacitors should be mounted as close as practical to the appropriate ICs. It largely depends how much confidence you have in the person doing the layout. RP > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .