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nk25719 / KiCad-esp32-6leds-2switches-1pj-circuit

In this repo I am practicing KICAD. Created an ESP32 DevKit V1 module and a PCB footprint. I designed a circuit around this ESP32 consisting of six lamps, four switches, and two power jacks and added a voltage regulater to Vin to maintain a supply of +5V. (This project was originally made of two switches and 1 power jack and was named homeWork2.)
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Uncertainty on Pre-Defined Via Sizes #19

Open ForrestErickson opened 1 month ago

ForrestErickson commented 1 month ago

Lee left the following question on the FaceBook KiCad page.
https://www.facebook.com/groups/861083273995933/user/100001157659918

Regarding, via "pre-defined size"

Can someone suggest a family of good sizes?

I will be targeting for manufacture at JLCPCB. The minimum is trivial (The hole must not be smaller thant the smalles allowed. The annular ring must not be smaller than the smallest allowed). We have to respect the JLCPCB requirements.

But what about progressively larger vias?

How do I make choices that do not have unexpected negative consequences?

ForrestErickson commented 1 month ago

Question left with JLCPCB on line help on 20240529

Hello Regarding my setup for PCB design drills... I would think that sized that are some "standard" drill would be the best to choose but I have no informed idea what those sizes may be. Would the be number drill sizes? Increments of some metric dimension to which I living in the USA have never had exposure? Even some increment of mills? Read FYI I hope to share some list of prefered hole sizes (Drill sizes) with fellow designers of PCBs on the KiCAD Facebook group I frequent and where I asked this question.

ForrestErickson commented 1 month ago

This linked in thread has some information on PCB hole sizes: https://www.linkedin.com/pulse/what-production-hole-diameter-pcb-rayming-techonloy-0vl5c/ There is a chart there: https://media.licdn.com/dms/image/D5612AQHkzJ1s9hjzHQ/article-inline_image-shrink_1000_1488/0/1699238149589?e=1722470400&v=beta&t=GxRSd8Mz3mJPI1Iur5hHvuaNLWC-nTDxOFG2-RS0GaU

A summary:

Some of the most common hole diameter sizes from these standards: 0.8 mm - Used for many axial leaded components like resistors and ceramics. Also a popular via size. 1.0 mm - Larger axial leaded components, wire-to-board connectors, IC sockets. 1.27 mm (0.050 inches) - Widely used for ICs, interconnects, and mounting holes. 1.5 mm to 3.2 mm - For larger through-hole components like electrolytic capacitors, fuses, and TO-220 transistors. 0.9 mm to 1.5 mm - Common via sizes in multilayer boards.

Another reference but with far too many to help:
https://www.kyoceraprecisiontools.com/pcb/pdf/PCB_Diameter_Chart.pdf