STEPS FOR USING EAGLE

1) Open eagle 5.7.

2) Go to new -> schematic.

3) On left hand side corner there will be a dotted box known as Grid. Below file option

4) Open grid in that click on display(on) and in style(click on dots) below that there will be size

multiple and alt options do not change these values change multiple to 2(standard value) and

change inch->mm in options on side of size and alt dont worry if values change thats just

conversion

5) If black screen appears you can change it to white and vice versa as pr your preference you can

do the same by clicking on options->user interface->schematic->black/white

6) Now on your extreme left you can see small icons or images i.e. your toolbar in that there are

various options if you place your pointer on it their names will appear and you will understand

their functions

7) We will make a simple circuit of digital optical sensor given in ppt slide no 138

8) In library of eagle there is no option of photo diode so we will use 2 leds for rx as well as tx

here we are not concerned with the working of the circuit but just the designing of the same

9) First add devices as shown in the diagram and make the connections for the same

10) To add go to add

11) led->LED->5mm

12) transistor->npn-> 2n3904

13) rcl->R_US->7.5mm

14) supply1->+5v->GNMD

15) pinheads->PINHD-1*3->PINHD-1*03

16) after the devices have been added make connections by first arranging and rotating them as per

their positions with the help of rotate and move options in toolbar and connect them with wires

with the help of wires option

17) Make sure that the angle of wire is 90 degrees i.e. make sure that angle is 90 degrees on right

hand side of grid

18) You can check whether your components are properly connected or not by clicking on move

options and then move your device or wire. the device as well as wire connected to it should

move

19) Second method to check the same is by clicking on show option in toolbar(eye icon)

20) And change the background color to black click on wires your wire as well as endings of

component should be highlighted which means connections are proper

21) After this is done add frame to your schematic for presentation add->frames->A5L LOC

22) Give name and values to components by clicking on R@ name and R2 values option in toolbar

give names and values if you know otherwise its ok it will only show a warning

23) Then click on ! icon in tool bar to check errors if there are any errors then correct them and

approve them on your own warnings dont matter

24) Now save your schematic on desktop in folder with your name and extension should be .sch

25) Now go to file->switch to board

26) Repeat the grid step

27) Now you will see an empty box on you right and components with connections on left

28) Move them inside box

29) Arrange them in such a way that it occupies least space so that size of circuit is small And for

cost reduction with the help of move and rotate options

30) Now reduce the size of box with help of rat nest option in toolbar

31) Now you can give drill on board this is done by hole option in toolbar

32) Change size of drill as per your requirement

33) Keep checking your work by repeating step 23

34) Click on auto(auto routing option) in tool bar

35) In that in general you will see 2 options top and bottom

36) These options are for connections i.e. whether you want connections on top of board or at the

bottom

37) Select n/a in top for no connections on top of board

38) Select * in bottom for 100% connections at bottom

39) Click on ok your components will be connected

40) Now change the thickness of components connected to VCC

41) How will one come to know which components are connected to VCC

42) For that go to schematic repeat step no but only click on wire connected to +5 it will get

highlighted then go to board the same will happen i.e. lines connected to vcc will be highlighted

43) You can change the thickness by selecting change option in toolbar in that go to width->0.8 or 1

for lines connected to gnd or vcc and 0.4 or0.6 for normal connections.

44) Keep checking for errors

45) Then click on polygon option in toolbar

46) In that angle should be 45 degrees

47) Use it as border for your board

48) Then click on rat nest your board will be highlighted

49) Click on R2NAME and on corner of board

50) A block will appear saying name this polygon as

51) Name it as GND

52) Save your work

53) Now create 3 layers i.e.

54) Bottom layer->bottom,pad,vias,dimension,drills

55) Masking layer->dimension,bstop

56) Top layer->dimension,tplace,tname,tvalue,tdocu

57) We give only 3 layers so that our design does not get leaked

58) Above layers can be created by clicking on display option in toolbar.

PREPARED BY :NIRAJ THAKKAR