Op Amp symbol as triangle, not rectangle

Question

Hi,

New to Eagle.

I'm using a Microchip dual op amp MCP6002 in my schematic.

I've successfully downloaded the Microchip library however the IC displays as a single block rectangle and not as two individual (triangles) op amps. This doesn't make for easy schematic viewing so wondering if there's a way to convert MCP6002 symbol into two individual op amps, each with triangle symbol but together using the same pad layout (with different pins of course). Very happy to look at any tutorials/docs if anyone can point me in the right direction. Thanks.

kind regards,

Stuart

shabaz · Accepted Answer

Hi Stuart, Take a look at some of the op amps supplied in the default libraries with EAGLE for some ideas - they have achieved what you're asking for. Basically the trick is, they create multiple 'symbols' in a library, and then they are all applied in the 'device' view in the library. Google should reveal tutorials on part creation in a library (the step to apply multiple symbols is the same as the step to apply one symbol to the device, just repeat it). The EAGLE user manual is also pretty good. You can edit a library, but a better method is just create your own library and create parts in it as and when required. You can also copy and paste parts from one library into another if you want to, and copy and paste symbols or packages too. A lot of flexibility, the only real way to learn it is to try to create some parts just for practice.

autodeskguest · Answer

On 25/02/16 17:34, Stuart Robertson wrote: Hi, New to Eagle. I'm using a Microchip dual op amp MCP6002 in my schematic. I've successfully downloaded the Microchip library however the IC displays as a single block rectangle and not as two individual (triangles) op amps. This doesn't make for easy schematic viewing so wondering if there's a way to convert MCP6002 symbol into two individual op amps, each with triangle symbol but together using the same pad layout (with different pins of course). Very happy to look at any tutorials/docs if anyone can point me in the right direction. Thanks. Sadly an awful lot of the downloadable library parts are very poorly implemented, as you have found. The usual advice, in fact, is never to trust a library you have downloaded. It's nearly always quicker to create your own than to carefully check and then rectify somebody else's. In this particular case, if you're using the DIL or SO-8 package, the MCP6002 is a perfectly ordinary, standard dual op-amp with the same pin-out as the "2AMP_P8+4" component in the "linear" library that is shipped with Eagle. I'd just use that.

shabaz · Answer

Hi Stuart, Also, Rob has a good point, since your part has a normal op amp topology, you could use one of the other correctly drawn op amps that are part of the default libraries in EAGLE. Once you place it on your schematic, you can click on the 'Value' icon in the toolbar, select the op amp and rename it to MCP6002.

autodeskguest · Answer

On 26/02/2016 6:34 a.m., Stuart Robertson wrote: Hi, New to Eagle. I'm using a Microchip dual op amp MCP6002 in my schematic. I've successfully downloaded the Microchip library however the IC displays as a single block rectangle and not as two individual (triangles) op amps. This doesn't make for easy schematic viewing so wondering if there's a way to convert MCP6002 symbol into two individual op amps, each with triangle symbol but together using the same pad layout (with different pins of course). Very happy to look at any tutorials/docs if anyone can point me in the right direction. Thanks. Hi There are many tutorials out there. I would recommend watching a couple of videos to quickly reach an understanding of how 'Packages', 'Symbols' come together to make a 'Device'. One thing for sure is that to use Eagle you will need to learn how to make library components. So settle in and do tutorials The Eagle manual (Chapter 8) explains it well. The manual is in the Documentation Folder in the Control Panel. Fortunately there is already a device in the Eagle provided libraries that seems to be a copy of your needs. AD712 analog-devices.lbr If so, learn how to copy that whole device across to your personal library and change its name , description, attributes until its what you want. You can practice using it on a dummy schematic. When you ADD that AD712 to the schematic it delivers both OP amps and the power pins in one go. Compare that with a 7400 device where the gates are added one at a time and you INVOKE on a placed gate to select the power pins to place. HTH Warren

rachaelp · Answer

As has been said, most downloaded library parts are really poor quality and

I agree the rectangular box op-amps with it all in one package are really

annoying and as you say, don't make for readable schematics.

Here are a couple of good tutorials you can go through to get the

essentials of what you need to do, although they do also just use

rectangular symbols with names in pin order so don't take them too

literally, just use the techniques shown:

From Adafruit:

https://learn.adafruit.com/ktowns-ultimate-creating-parts-in-eagle-tutorial/introduction

From Dangerous Prototypes:

http://dangerousprototypes.com/docs/Cadsoft_Eagle_how_to_make_parts_tutorial

Once you get the hang of the basics you can then build on that with more

advanced features like technologies, variants and enabling pin swapping

etc.

Here is a site with a few tutorials on these topics:

http://blog.ilektronx.com/search/label/eagle%20tutorial

Best Regards,

Rachael

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