Hi David, Your project looks OK except that you have marked the cap in the schematic as: 20 pF +/- 500 fF and on the PCB as: 20 pF +/- 50 fF and described it as Cornell *Dumilier* instead of Cornell *Dubilier*. There's a typo in the 50R resistor Manufacturer's name: you have typed Vishey instead of Vishay (as in the 1M part). It would be better to put the mounting holes in the schematic. See: https://easyeda.com/forum/topic/The_best_way_to_design_a_PCB_in_EasyEDA-ThR3pwqIC Move the connector colour text in from the edge of the PCB. The text is very close to the edge and may get clipped by the PCB fab design rules. You may also want to make the connector colour text larger. In fact it might be a good idea to move the whole pcb layout (except the main big text) up the board a bit to keep the outermost connectors clear of the board mounting holes. BTW: I assume you know that you can get low cost, high quality PCBs made directly by EasyEDA?

Andy, Thank you for the thorough review. Yes - I am aware that these can be made at EasyEDA - I plan on placing an order soon. Having you look at it makes me much more confident in the design. One other question. The components plan on using are not in the parts list and I was unable to find a part that has similar hole spacing. I ended up finding the closest possible. For instance, all the connection points at the bottom of the board (with the color labels) should be 5.1 mm, but I settled for 5 mm. Is there a way to adjust this component hole spacing? Will this 0.1 mm difference cause problems? Thanks again Andy - I appreciate your time looking at the board. David

I don't think the resistors and the capacitor that you need are available from LCSC but you can better edit the component attributes of the schematic symbols by adding a Supplier and supplier part numbers. Also if you click on `Add new parameter` and enter `Description` in the `Key` box, enter the text description (I usually copy the supplier or datasheet headline description) and tick the `In BoM` box then when you click on the `BOM` button, all the information you need to identify and order the parts will be in the Bill of Materials that is generated and you can then download. 5.1mm is a metric approximation to 0.2 inch (2*2.54 = 5.08). If you do a SHIFT+F search for 0.2 inch you'll find this PCB footprint: `.25 Spade Connect .2 inch spacing` (A search for 0.2"` returns `2-pin header .2" pin spacing` but `.25 Spade Connect .2 inch spacing` is probably a better fit. for what you want.) So, just edit the package assigned to T1 to T5 from `AXIAL-5MM` to `.25 Spade Connect .2 inch spacing`. BTW, you'll sind schematic symbols and associated footprints for `3mmhole` and a `6mmhole` in the SHIFT+F search. If you need a different size, just clone and edit the associated packages. and there you are, almost done. * Then please read: https://easyeda.com/forum/topic/Essential_checks_before_placing_a_PCB_order-UuohztL3l

Your posts that you link are great. These should be stickied at the top of the forum. Thanks for all the help.