Now, you gave me some food for thought with your conversion... unfortunately, an ATmega328p does not fit into my board... only if we have a similar board (Arduino clone), using 25k22, 26k22... so, first must be the chicken... to lay the eggs...
Vasi(funlw65) On Aug 5, 3:56 pm, Sebastien Lelong <[email protected]> wrote: > Hi guys, > > I tried to design Cuckoo PCB, attached are Eagle files and screenshot for > bottom and top layers. Most traces are 16mil width, sometime 14mil to pass > between holes, and 5V/GND traces are 20mil. > > This is a double-sided PCB, aimed to be plugged upside down: bottom side, > where Cuckoo drawing is visible, is the one that can be viewed when plugged > on Arduino. PIC, and most components will be hidden by the board. In my > "reckoning" is correct, components should fit appropriately between Atmega > chipset, Xtal, push button and shield connectors. Maybe... > > Subsidiary question: in Eagle, I manually route traces, and added ratsness > rectangle. I wanted to check if no unrouted traces were remaining (I know > there weren't but...), and Eagle started to create new signals, with very > little traces and vias. There weren't connected to any existing signals, > it's as though it was to "cut" ratsness rectangle. I've removed them. Does > anyone know what's the purpose of such added traces/signals ? > > As reply to you, Sir Vasile Surducan: > > 2010/7/24 vasile surducan <[email protected]> > > > We had a looong discussion about ICSP some time ago, so this is the last > > time I'm opening again my mouth (by writting) about this subject. > > Put a 47nF... 100nF capacitor in parallel with your reset switch, in that > > way when turn ON the power supply, reset will be automatically, change R1 > > from 1k2 to 10k...33k and take out that diode. > > See for reference (only if consider those above) this one: > >http://4.bp.blogspot.com/_0iJadzFlwNo/S_OgtycPtxI/AAAAAAAAAAc/vNesIW3... > > Due to lack of space, I've removed reset switch. About reset resistor, > Arduino already has one, 10K, connected from RESET /MCLR to +5V. If I had > added another resistor on Cuckoo board, both resistors would have been in > parallel, resulting in a "not so good value I guess". So, I've made cuckoo > reset resistor optional (for standalone usage, not connected to Arduino), > and let MCLR connected to Arduino reset circuitry (that is 10K). > > Diode was removed. > > > > > <http://4.bp.blogspot.com/_0iJadzFlwNo/S_OgtycPtxI/AAAAAAAAAAc/vNesIW3...>Switching > > the clock through a switch is a very bad idea. Very long routes of clock > > (incuding connectors in their path) is also a bad idea. > > Connecting to Arduino Xtal is now optional. By default, internal clock will > be recommanded (16MHz, same MIPS in the end). > > > > > If you want to start a merchantable new arduino, imagine the puzzle game > > (on a surface and not a startrek spatial puzzle) and imagine a complete > > jalluino-picolino (including "shields" ) in that way. Picolino = very small > > Sure, how do we proceed ? > > I think I'll try to build it with some cardboard, to check if all components > fit well. Then I plan to order PCBs from Seeedstudio prototyping service... > > Cheers, > Seb > > cuckoo_pcb_top.png > 360KViewDownload > > cuckoo_pcb_bottom.png > 367KViewDownload > > cuckoo.sch > 228KViewDownload > > cuckoo.brd > 66KViewDownload > > cuckoo_sch.png > 28KViewDownload -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
