SMASH / UNSMASH all parts or a grouped parts in Cadsoft EAGLE

At times you require to SMASH or UNSMASH a number of components at a time either for rearranging the names or re size their text. Sometime you might need to UNSMASH them. This is important for making the sikscreens legible and look nice.

Although this is possible through the use of ULPs , here is how it can be implemented by command line of eagle.

For smashing  all parts/components , use the following command


For unsmashing  all parts/components , use the following command


For smashing  already grouped parts/components , use the following command

SMASH (>0 0);

For unsmashing  already grouped parts/components , use the following command

SMASH (S> 0 0);

Cheers 🙂


[Cadsoft Eagle tips] hiding/unhiding Airwires

You can hide airwires only on a per signal basis.  If you turn off the  airwires for ground and power suplies you should have a much cleaner screen. Instead of using ratsnest ! signal_name, you can use the info command on a signal (airwire or trace) in the board window and you will see a check box “Airwires hidden” for that signal in the popup “Properties” window. Click on it and all airwires for that signal will be gone.

Hiding selected airwires
Sometimes it may be useful to hide the airwires of selected signals, for instance if these will later be connected through a polygon. Typically this could be supply signals, which have a lot of airwires that will never be routed explicitly and just obscure the other signals’ airwires.
To hide airwires the RATSNEST command can be given the exclamation mark (‘!’), followed by a list of signals, as in


which would hide the airwires of the signals GND and VCC.
To have the airwires displayed again just enter the RATSNEST command without the ‘!’ character, and the list of signals:


This will activate the display of the airwires of the signals GND and VCC and also recalculates them. You can also recalculate the airwires (and polygons) of particular signals this way.
The signal names may contain wildcards, and the two variants may be combined, as in


which would recalculate and display the airwires of all signals with names beginning with ‘D’, and hide the airwires of all the various GND signals (like AGND, DGND etc.) and the VCC signal. Note that the command is processed from left to right, so in case there is a DGND signal the example would first process it for display, but then hide its airwires.
To make sure all airwires are displayed enter


Use ‘RATS *’ at the command prompt to show all airwires.”


Sim800H EAGLE library / footprint

SIM800H is a complete Quad-band GSM/GPRS solution in a LGA type which can be embedded in the customer applications.
SIM800H support Quad-band 850/900/1800/1900MHz, it can transmit Voice, SMS and data information with low power consumption. With tiny size of 15.8*17.8*2.4 mm, it can fit into slim and compact demands of customer design.  Featuring Bluetooth, FM and Embedded AT, it allows total cost savings and fast time-to-market for customer applications.




Product details

Download Library for Eagle Cadsoft


EAGLE footprint for Dual rj45 stack from Leyconn Leyconn-55913

I am sharing the Cadsoft EAGLE footprint for Leyconn-55913 A double tier rj45 jack. It has two rj45 stacked one over other and has no LEDs. You can find below the product info  and the library.   Download :   Leyconn-55913 dual rj45 jack.lbr

Part Number:55913882XX00
Series 5921 Contacts: 8 Ways,NON LED Double Tier 2 Port,NON Shield
Halogen Free:Yes




Cadsoft Eagle footprint Library Little Fuse 658 659 series SMD


Accessory Type: Fuse Holder Cover
For Use With: Littelfuse 658 Series Fuse Holders
RoHS Compliant: YES
SVHC: No SVHC (20-Jun-2013)
Technical Data Sheet (82.98KB) EN








Available in  the Library here



Routing Diferential traces in Cadsoft Eagle

Eagle supports basic differential routing. To make a pair of traces a differential  pair, both signals should have the same name with _N and _P at the end. For example `MIC_N` and `MIC_P`. When you try to route this signal it will be seen as a differential  pair and will be routed as one. This means that both the traces will be routed at the same time as shown in the image above. Wen one of the two traces is selected both will be routed at the same time. To route only one trace, click on the trace to route it and when both traces are selected press escape to only route the one you selected.