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
GROUP ALL; SMASH (>0 0);
For unsmashing all parts/components , use the following command
GROUP ALL; SMASH (S> 0 0);
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);
Make a library of all the parts used in your board
Open the .brd file using Eagle, goto File->Run, and open “exp-project-lbr.ulp”, this will export the components used in the board as a Eagle library.
Great trick for when a library is not available directly.
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
RATSNEST ! GND VCC
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:
RATSNEST GND VCC
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
RATSNEST D* ! ?GND VCC
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 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.
Download Library for Eagle Cadsoft
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
|Series 5921 Contacts: 8 Ways，NON LED Double Tier 2 Port，NON Shield
LITTELFUSE WICKMANN 66000001009 FUSE HOLDER COVER
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
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_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.