How do i Create a Component for my schematic in Autodesk Eagle.

Hi Keith,

I wrote a tutorial series for creating library part which you might find helpful. You can find it here: https://www.element14.com/community/docs/DOC-88188/l/eagle-tutorial-series

keithmdavis  wrote:

 

i have the dimensions to put it in but battling to add it to my library because i can not get my dimensions correct.

Can you expand on what problems specifically you are having in getting your dimensions correct?

Best Regards,

Rachael

Keith,

Understanding the dimensions is a fundamental part of the problem.  In order to have the proper footprint on the PCB you have to be able to convert the manufactures drawing into a library element.  Sometimes these drawing are vague and/or confusing.  When I run into a drawing that I can not understand, I buy the part and measure it myself.

Best of luck!

Gene

on trying to draw part i start with drawing a rectangle but dimensions are small for example it is 21.5mm x 29.5mm batling to be exact i was thinking to go with a bigger scale then change scale i will keep trying as i need to have my relay logic board correct.

Thank you i realize that my error is trying to draw it size for size i need to expand it to get the accuracy needed

Hi Keith,

I think your best bed is to make use of the grids at this point. What I would do here if I wanted to draw that rectangle which I am assuming is the outer dimension of your relay, I would set the main grid to 14.75mm and the alt grid to 10.75mm as follows:

GRID MM 14.75 ON; GRID ALT MM 10.75;

Then with just the main grid I would draw a square 2 x 2 grid spaces around the origin so that is was 29.5mm in both directions. Then with the move command move the left hand edge to be in line with the origin and then hold ALT and move it back out to the position defined by the ALT grid. Repeat this for the other side. You should now have a rectangle which is 21.5mm wide and 29.5mm tall centred around the origin.

FYI, I always centre my parts on the origin. It make it much easier to know where to click to pick it up. One of the many reasons I don't use the bundled library parts where you have to go hunting the origin!

Best Regards,

Rachael

I just realised you said schematic in your title. What I wrote above is valid for the tPlace outline for the PCB footprint in the library, not for the schematic.

For the schematic, ALWAYS use a 0.1" grid and draw a logical symbol with a sensible size compared to other components such that your schematic doesn't look odd.

Best Regards,

Rachael

Thank you Rachel i have received zip files from manufacturer of the relay in question how do i add them to eagle sorry i never grew up with computers but being a qualified Electrician since 1980. The last 22 years i have specialized in welding equipment more importantly i am self taught in electronic repairs with the aid of many engineers & technicians. My new challenge is to learn Autodesk Eagle. I am 59 years old not very familiar with computers only being able to download and inspect data on pc boards i am repairing. i am familiar with relay logic as some of the panels i worked on was in Dunlops Rhodesia now Zimbabwe. This insight enabled me to audit any machine & hand draw electrical circuit designs. Some Relay panels had 2000000 terminations especially tyre builder machines i was accredited by my fellow electricians for my accuracy for point to point auditing. Beacon Sweets & Chocolate paid me on weekends to audit machines in the factory so as to create the cad drawings for all the equipment. Cad drawings were done by one of my mentors Mr. Bruce Hodgett.He at that time was an Electrical Engineer sad to say he is late now. Sorry i have gone on a bit but i assure you i am willing & wanting to learn.