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10-02-2018, 01:07 AM
Library parts: Packages (part-3)
To lay the pads of the part, go to the PAD icon on the left-toolbar and left-click. A default virtual pad will be stuck to the cursor and a pad-shape toolbar will open along the top of the window. There is a choice of pad shapes:
square
round
octagon
long
offset
Then a Diameter option, a Drill-size option and an Angle option.
Suppose we select Long as the shape by Left-click on Long, then cursor over to Drill and scroll down to the size of hole needed to clear the pin by at least 7-mil; left-click; then cursor to where we want to drop the first pad; left-click; cursor to where we want the second pin; left-click, until we have as many pads as there are pins on the package; double-click and the virtual pad disappears from the cursor.
While the virtual pad is on the cursor, if you right-click you will see the pad rotate. In the Angle window on the upper toolbar you will see the angle change by 90-degrees each time you right-click. You can use this to orient the pads in different ways as you drop them. if the pads need to be rotated after they are dropped, you simply use the ROTATE function or the MOVE function, both in the left-hand toolbar.
Each pad is given a name by Eagle as P$1, P$2, P$3, etc. You can rename the pads to be more meaningful to you or to others looking at the parts. For an IC or something with many pins, the pads may simply be left as they are if they happen to be dropped in the numerical sequence of the component leads as named, i.e., 1,2,3... or, you may wish to name the pads by function. For a transistor, E,B,C are useful, denoting emitter, base, collector, or if it a relay, C,NC,NO,LP,LM, for Common (movable contact or wiper), normally-closed, normally-open, coil-positive-end, coil-negative-end.
Use the TEXT function and type >NAME into the text window, then OK, then cursor up to the Layer window and select the
24-tnames, left-click; then cursor over to the Size window and scroll to 0.04; left-click, then cursor to where you want to drop the text; left-click; then cursor over to the Text icon again; left-click; type >VALUES into the text window; then click on OK; then cursor up the Layers again and select 27-tvalues; left-click; then cursor to where you wish to drop the text - the size will be same as selected for >NAMES - left-click; cursor up to the Stop sign and left-click. The virtual text will disappear.
Just as we saw with the long pad, if we right-click while the virtual text is on the cursor we see it rotate.
Remember to SAVE along the way.
To lay the pads of the part, go to the PAD icon on the left-toolbar and left-click. A default virtual pad will be stuck to the cursor and a pad-shape toolbar will open along the top of the window. There is a choice of pad shapes:
square
round
octagon
long
offset
Then a Diameter option, a Drill-size option and an Angle option.
Suppose we select Long as the shape by Left-click on Long, then cursor over to Drill and scroll down to the size of hole needed to clear the pin by at least 7-mil; left-click; then cursor to where we want to drop the first pad; left-click; cursor to where we want the second pin; left-click, until we have as many pads as there are pins on the package; double-click and the virtual pad disappears from the cursor.
While the virtual pad is on the cursor, if you right-click you will see the pad rotate. In the Angle window on the upper toolbar you will see the angle change by 90-degrees each time you right-click. You can use this to orient the pads in different ways as you drop them. if the pads need to be rotated after they are dropped, you simply use the ROTATE function or the MOVE function, both in the left-hand toolbar.
Each pad is given a name by Eagle as P$1, P$2, P$3, etc. You can rename the pads to be more meaningful to you or to others looking at the parts. For an IC or something with many pins, the pads may simply be left as they are if they happen to be dropped in the numerical sequence of the component leads as named, i.e., 1,2,3... or, you may wish to name the pads by function. For a transistor, E,B,C are useful, denoting emitter, base, collector, or if it a relay, C,NC,NO,LP,LM, for Common (movable contact or wiper), normally-closed, normally-open, coil-positive-end, coil-negative-end.
Use the TEXT function and type >NAME into the text window, then OK, then cursor up to the Layer window and select the
24-tnames, left-click; then cursor over to the Size window and scroll to 0.04; left-click, then cursor to where you want to drop the text; left-click; then cursor over to the Text icon again; left-click; type >VALUES into the text window; then click on OK; then cursor up the Layers again and select 27-tvalues; left-click; then cursor to where you wish to drop the text - the size will be same as selected for >NAMES - left-click; cursor up to the Stop sign and left-click. The virtual text will disappear.
Just as we saw with the long pad, if we right-click while the virtual text is on the cursor we see it rotate.
Remember to SAVE along the way.
