Hi, I'm a total eagle beginner, and I've just made my first schematic and board. Could you please check it, if it's usable? Thanks 
Hi, I'm a total eagle beginner, and I've just made my first schematic and board. Could you please check it, if it's usable? Thanks
On 20.07.2015 00:56, Jacob Sycha wrote:
Hi, I'm a total eagle beginner, and I've just made my first schematic
and board. Could you please check it, if it's usable? Thanks
First impressions:
-Double sided board seems overkill for this simple circuit. See if you
can make it single layer.
-Track thickness is very thin. Thin tracks are harder to manufacture.
-You can probably compress pcb size to a minimum.
-Wire bends are a bit untidy.
-For schematic, there is alot of unnecessary junctions. There is no need
for junctions at pin connections, or at 90deg bends.
-The 555 timer seems to already exist (several times) in Eagle libraries
A more critical look:
-I opened this is eagle 6.5.4, and I ERC errors:
-consistancy error :net class parameters differs in brd vs sch
-consistancy error :LED naming different in brd vs sch
-U1 pin 5(CONT) is defined as an input but doesnt have any input (this
could mean the U1 could go nuts, or library component pin direction for
pin 5 is wrong). Taking a quick look at the datasheet, I'd suggest
putting a capacitor on this pin to gnd, but I do not know this circit.
Since I'm unsecure, I would just put it in and worry about soldering it
later.
ERC Warnings:
-Missing juction at the CONN xref
-VDD power pin of U1 connected to N$1 (Eagle expects pins with direction
POWER to be connected to a net with same name as the pin)
-LED1 is missing a value
DRC issues:
-For this kind of board, I would make larger distance between pads and
wire (fill).
-There are some weird stuff left on stop mask around pin 4 of U1. It
seems to be in the package definition.
-Capacitor package has capacitor symbol on pads. They will be shaved off
by the manufacturer but if you do want silk screen, I'd remove it from
package.
Finally, I have a personal preference for SMD components for small
projects. Drilling is just unnecessary work, and soldering SMD runs
smooth after some practice. Im sure you can find tutorials on youtube.
I also prefer to have sensible netnames that can quickly point you back
to schematic when reviewing the layout.
I did some homework for you and attached the cleanup I did to your
project. Compare it with yours 
Use 7zip.org to unpack.
On 20.07.2015 00:56, Jacob Sycha wrote:
Hi, I'm a total eagle beginner, and I've just made my first schematic
and board. Could you please check it, if it's usable? Thanks
First impressions:
-Double sided board seems overkill for this simple circuit. See if you
can make it single layer.
-Track thickness is very thin. Thin tracks are harder to manufacture.
-You can probably compress pcb size to a minimum.
-Wire bends are a bit untidy.
-For schematic, there is alot of unnecessary junctions. There is no need
for junctions at pin connections, or at 90deg bends.
-The 555 timer seems to already exist (several times) in Eagle libraries
A more critical look:
-I opened this is eagle 6.5.4, and I ERC errors:
-consistancy error :net class parameters differs in brd vs sch
-consistancy error :LED naming different in brd vs sch
-U1 pin 5(CONT) is defined as an input but doesnt have any input (this
could mean the U1 could go nuts, or library component pin direction for
pin 5 is wrong). Taking a quick look at the datasheet, I'd suggest
putting a capacitor on this pin to gnd, but I do not know this circit.
Since I'm unsecure, I would just put it in and worry about soldering it
later.
ERC Warnings:
-Missing juction at the CONN xref
-VDD power pin of U1 connected to N$1 (Eagle expects pins with direction
POWER to be connected to a net with same name as the pin)
-LED1 is missing a value
DRC issues:
-For this kind of board, I would make larger distance between pads and
wire (fill).
-There are some weird stuff left on stop mask around pin 4 of U1. It
seems to be in the package definition.
-Capacitor package has capacitor symbol on pads. They will be shaved off
by the manufacturer but if you do want silk screen, I'd remove it from
package.
Finally, I have a personal preference for SMD components for small
projects. Drilling is just unnecessary work, and soldering SMD runs
smooth after some practice. Im sure you can find tutorials on youtube.
I also prefer to have sensible netnames that can quickly point you back
to schematic when reviewing the layout.
I did some homework for you and attached the cleanup I did to your
project. Compare it with yours Use 7zip.org to unpack.
Am 20.07.2015 um 09:22 schrieb Morten Leikvoll:
On 20.07.2015 00:56, Jacob Sycha wrote:
Hi, I'm a total eagle beginner, and I've just made my first schematic
and board. Could you please check it, if it's usable? Thanks
First impressions:
-Double sided board seems overkill for this simple circuit. See if you
can make it single layer.
-Track thickness is very thin. Thin tracks are harder to manufacture.
-You can probably compress pcb size to a minimum.
-Wire bends are a bit untidy.
-For schematic, there is alot of unnecessary junctions. There is no need
for junctions at pin connections, or at 90deg bends.
-The 555 timer seems to already exist (several times) in Eagle libraries
A more critical look:
-I opened this is eagle 6.5.4, and I ERC errors:
-consistancy error :net class parameters differs in brd vs sch
-consistancy error :LED naming different in brd vs sch
-U1 pin 5(CONT) is defined as an input but doesnt have any input (this
could mean the U1 could go nuts, or library component pin direction for
pin 5 is wrong). Taking a quick look at the datasheet, I'd suggest
putting a capacitor on this pin to gnd, but I do not know this circit.
Since I'm unsecure, I would just put it in and worry about soldering it
later.
ERC Warnings:
-Missing juction at the CONN xref
-VDD power pin of U1 connected to N$1 (Eagle expects pins with direction
POWER to be connected to a net with same name as the pin)
-LED1 is missing a value
DRC issues:
-For this kind of board, I would make larger distance between pads and
wire (fill).
-There are some weird stuff left on stop mask around pin 4 of U1. It
seems to be in the package definition.
-Capacitor package has capacitor symbol on pads. They will be shaved off
by the manufacturer but if you do want silk screen, I'd remove it from
package.
Finally, I have a personal preference for SMD components for small
projects. Drilling is just unnecessary work, and soldering SMD runs
smooth after some practice. Im sure you can find tutorials on youtube.
I also prefer to have sensible netnames that can quickly point you back
to schematic when reviewing the layout.
I did some homework for you and attached the cleanup I did to your
project. Compare it with yours
Use 7zip.org to unpack.
Hi Morton,
despite the fact that you are verrrrry polite 
here my critics to your layout:
for though hole technology the bottom layer should be used
and you "confirm" his way of connecting the gnd connections via ratsnest.
This method leads imho to coincidental connections specially in higher
density layouts.
--
Mit freundlichen Grüßen / With best regards
Joern Paschedag
