Exploring Eagle CAD ULPs #3 – Teardrops.ULP Make A Teardrop Shape Connection With Pads and Vias

Welcome to the third post of the “Exploring Eagle CAD ULPs” series. Every week we will publish a new post about one useful ULP in Eagle CAD.
“ULP” User Language Program is a plain text file which is written in a C­-like syntax and can be used to access the EAGLE data structures and to create a wide variety of output files. You can consider it like a plug-in for Eagle.
You can reach the posts published in this series using the following link.Exploring Eagle CAD ULPs #3 – Teardrops
In this post we are going to explore a ULP called ‘Teardrops.ULP’. This ULP makes a teardrop shape connection between the traces and the vias or pads.
Before I found this ULP, I thought that I can’t do the teardrop thing using Eagle CAD, while I saw a lot of designs that have been done using Altium have this feature.
Using teardrop shape connection may result in many advantages:

  1. It prevents drill breakout due to drill misalignment where the trace joins the via or through hole.
  2. It makes stronger connection between the traces and the pads. Thermal expansion when re-soldering/desoldering could sometimes lead to a loose connection where the trace joins the pad.

For more detail: Exploring Eagle CAD ULPs #3 – Teardrops.ULP Make A Teardrop Shape Connection With Pads and Vias


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Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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