Very Simple Circuit for Automatic Lock and Unlock of Interlock.

In this tutorial, we are going to learn Very Simple Circuit for Automatic Lock and Unlock of Interlock.

Here we are taking very simple design for PCB design begins:

As per below circuit for automatic inter lock, in this circuit can see there one WI-FI module which are use for WI-FI. First we make the any project lest have clear the specifications of project then select the components & create the circuit as per project requirement. In this circuit can see there is two sensor which through lock and unlock via motor driver of ULN 2003 all components are working interconnect with WI-FI module that’s operate through programming.

Below are the BOM for Circuit for Automatic Lock and Unlock of Interlock..

1      1      D1                                          LED

2      1      J1                                         CON5

3      1      J2                                         CON2

4      1      J3                                         CON3

5      1      M1                                        U2845

6      2      Q2,Q1                                    SENSOR

7      5      R1,R2,R3,R4,R5                    10K

8      1      U1                                           ULN2003

PCB Library: When we have completed the circuit then we have to create the PCB library as per circuit BOM.

Here we are taking one example of PCB lib, Below is the LIB for WI-FI module which are created as per datasheet when create the any library should have the datasheet of particular components so that can make the same footprint, Which are dimension should be same as datasheet if we do the any error then at the assembly time components will not be fit so that always create the footprint proper dimensions of components.

PCB Layout Design: When we have completed the circuit and PCB lib then design the final layout of PCB, as per below layout for Automatic Lock and Unlock of Interlock. In this below design can see there is two layer, top layer always use all signal trace and other trace, try to make the bottom layer complete with ground layer which are always working as heat sink of PCB which protect the circuit from heating , In this PCB can see there is two layer . One is top layer there is maximum signal traces and other traces only bottom side use ground layer which is best way of PCB design. When we design any types of PCB first take the mechanical dimension which is provided by costumer or mechanical engineer. 

Below are the main points of PCB layout design:

  1. First take the mechanical dimensions.
  2. Then put the all connector which have fixed location.
  3. Then place the main part of circuit like Wi-Fi module.
  4. Place the all components as per flow of circuit.
  5. Whenever the Placement is done then routing the PCB.
  6. When we design the two layer PCB then route the all signal & other traces on top side & ground layer should be route on bottom side.

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