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 (This project was originally made of two switches and 1 power jack and was named homeWork2.)

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The Power Jack (AKA Barrel Jack) Needs To Be Near / Overhang Board Edge. #4

Closed ForrestErickson closed 1 month ago

ForrestErickson commented 2 months ago

Summary

The layout of 20240421 has poorly placed Power Jack. The PCB will interfer with fingers

Suggestion(s)

The barrel jack must overhang the edge of the PCB. So that it might be flush with an enclosure. In which Direction / edge of the PCB should the power jack be located?

nk25719 commented 2 months ago

I received error messages when I let the barrel jack overlay the courtyard, and also the silkscreen was outside the Front silkscreen layer. After I received these error messages I placed the BJ at the edge of the board but not overlaying it.

ForrestErickson commented 2 months ago

The enclosure designer (Either you or someone else in a "company") must provide the requirement for how much the power jack should overhang the edge of the PCB.

This overhang must be equal to the enclosure thickness plus the uncertainty on the edge of the PCB (when it is routed or cut by JCLPCB) and possibly a small extra clearance.

Enclosure thickness = __ PCB edge tolerance = __ Extra clearance = ___

Add these up for the overhang.

nk25719 commented 2 months ago

Assume enclosure thickness of 2 mm, JLCPCB tolerance is +- 0.1 mm Clearance 0.9 mm ??

Overhang = 3 mm

This screenshot displays the Power Jack (also known as Barrel Jack), overhanging 3 mm the board edge.

nk25719 commented 2 months ago

I wasn't certain about the clearance distance, which is why I left a question mark beside it to revisit it later. Clearance: refers to the distance between the enclosure and the PCB.

ForrestErickson commented 2 months ago

Regarding "Clearance: refers to the distance between the enclosure and the PCB." Yes it does. I also called the same distance the overhang of the connector.

Example of Flush Mounted Connectors

ForrestErickson commented 1 month ago

We do not have an enclosure which drives any other requirements and so this has been fixed (To the extent possible at the present. Had we an enclosure to which we had to design we would need to place so that the power barrel jack surface was correct for the enclosure.)

Closing.