you don't want any these 90º angles in the traces on the board.Based on Matador's wonderful example above, along with all the other feedback in this thread, I've tried reconfiguring this board completely. I've totally overhauled my layout to more closely resemble the schematic layout a la Matador's. I've also completely changed the board size -- I was previously trying to keep it super compact because the project that I intend to use it in will have limited space, but I've now changed it to match the dimensions of a turret board that will house a separate part of the project so that they can be stacked. If anything, the board seems almost too spread out now.
I've added the suggested bypass capacitor. I've also added a footprint for two "optional" resistors to the bases of the output transistors. These were suggested by someone in another thread, but I have yet to clarify whether or not they will actually be needed -- if not, these will be populated with jumpers, which actually solves some minor routing problems anyway.
Before I send off for a couple of boards, any last changes you'd make? Am I still way off the mark?
View attachment 89429
source: datasheet CD4053, page 21.
You should place a VIA above C4 heading to the collector, having a roundabout junction or place a squared rotated 45º or triangle polygonº.
a triangle polygon on al of the power rail junctions.
the twin connections to GND on R8, should be one and connect to the other via the other layer, horizontal.
rotate J1 180º and connect GND to vertical to J3 via the other layer.
you want to add a (schottky) diode between GND and the positive rail or interrupt the power rail close to socket and place it there.
Making a mistake is easy and it will burn some of the components.
It's best to place the values/part designators of the resistor/capacitors/semi conductors rather than component numbers.
keep the power rail (horizontal) on one side of the board and (multiple connected) via('s) to pull down/up tracks vertical where it's needed.
do Horizontal tracks on one side and vertical track on the other side, if you would handle ic's you will get in trouble.
Please text where it's needed, like at the jumpers and what's it for.