Tim, how do you plan to program the micro? I only ask because of the
odd way you are laying out ISP1 and ISP2. If you are using a standard
cable you will want to fix this. A picture is worth a thousand
words...
http://www.scienceprog.com/yet-another-simple-avr-isp-cable/
Regarding dimensions, it looks like your dimensions for the board are
1.75 x 2.7 inches. You can use layer 47 (measures) for documenting the
board size if you want, but you already covered the important part
(layer 20).
Your trace sizes are acceptable.
Not sure how you are powering your display, but make sure you use the
same ground as the rest of the circuit.
TJ
On Nov 20, 5:13 am, tim10243 <t...@brakemeier.info> wrote:
> hi tj,
> hi marc,
> thanks for your time. yes its my first try and after getting into the
> program its a little bit of fun too ;-)
> here is my second try - i didnīt trusted the eagle-auto-function this
> time and made it myself - i hope i did better this time ;-)http://www.eyris.net/spot/trigger_tim_02.brd
> I made some minor changes to the circuit:
> - There is no GND and VCC connection to the display anymore as Iīll
> connect the display outside of the board to the battery
> - There is no GND connection to the shutter and there is no LED on the
> board as well, as they will be connected elsewhere too
> - I changed the C2 elko capacitor into another one because the one
> used in the original .sch is as big as the Atmega
> According to your comments:
> - There are no traces below the radiomodule anymore
> - The Fire/Qench connections are close to the optocouplers now
> - There is a 100nF capacitor at pin 9 + 10 of the radiomudule now
> - The capacitor C1 is close to the Atmega now
> - The antennapoint should just be an connectionpoint for the cable
> coming from the antenna but I canīt find a single connectionpoint in
> the eagle library
> - The traces now are 0,016 wide - which size do you think they should
> have?
> take a look at let me know abut your opinion
> Tim
> On 19 Nov., 21:48, Mathe <i...@vaenw.nl> wrote:
> > Hi Tim,
> > Like TJ said, try to widen your traces; these are too thin.
> > Also you shouldn't run the antenna on the board but connect it as
> > close as possible to the RF module.
> > Some of the traces run too close to eachother or soldering islands.
> > try to put C1 as close as possible to the pins of the atmega.
> > Also add an extra 0.1uF as close as possible to the Vcc and GND pins
> > of the radiomodule.
> > Make sure you have this double sided board metalised from top to
> > bottom otherwise it will be very hard to solder some components.
> > But if this your first try I think you've done well :)
> > Marc
> > On 18 nov, 11:02, tim10243 <t...@brakemeier.info> wrote:
> > > hi,
> > > after hours of soldering wires on an experimental board I came to the
> > > conclusion that it would be much more effective to make a PCB which is
> > > not so expensive as I thought at the beginning.
> > > now i tried to design a board with the software EAGLE which is for
> > > free in a light version. you gonna find my board at:www.eyris.net/spot/trigger_tim01.brd
> > > I would be happy if an expert here would take a couple of minutes to
> > > check this board and to take a look if I made some mistakes. if the
> > > board is ok and some of you are interested in it I could order some
> > > more. I would like to order the boards here:http://www.mikes-elektronikseite.de/
> > > and the price would be round about 5,- euro per board as far as i can
> > > see.
> > > Tim
