Designing car backseat table

Before installing micro controller to operate car backseat table read previous posts about how to install mechanical parts, installing dc motor and position sensors First of all select any  micro-controller   which is available and have external interrupts. I am using PIC-16f1789 in car backseat tray table Identify signals to operate the system To operate Car back seat table using micro-controller we need 3 signals for each table. One signal from open and close command to each table Detect open position of each table Detect close position of each table Here we are operating two tables so we need total six signals which are connected to port A through current limiting resistors(value of which depends on device type, specified on datasheet of I.C. you  are using). Electrical specifications for PIC 16f1789 Port A is used for interrupt input.Connections will be as follows. port A,1 connect with open/close button for table 1. port A,2 connect with...

To operate automatic system driving circuit is needed . first of all arrange following parts . Four relays . Two push buttons one click button DC supply  schematics of car tray system connect All parts as shown in above diagram. Connect motor while table is fully opened and switch two is pressed . shown under the top in 3d view of car tray table and second from top to bottom in schematic. Connect n/c pin of relay 2 to positive and n/c pin of relay 3 to negative. Connect n/o pin of rely 2 to negative and n/o pin of relay 3 to positive. Output from common pins of both relays is connected to dc geared motor. Above connections will reverse the polarity of both output when click switch is operated and in return reverse the direction of rotation of motor. when click switch is opened both outputs to the dc motor are from n/c pins of relays. motor will rotate until switch 3 is pushed down and relay 4 is operated making n/o pin positive which will operate relay 3....

To use these pictures first read previous post and refer below pictures to assemble car seat table. car seat frame once you open leather cover of seat you will find this kind of metal strips or metal rods . you will add two rods or one sheet to give tray system mechanical support as given below mechanical support for base Attach two rods as in above diagram. you can use metal strips or a metal sheet between frame to provide mechanical support to base of car seat tray base of car back seat table Next step is to attach base. To do this drill four holes in previously attached rods making a square . reapply leather cover and drill four holes in the base of car tray base both should in front of each other joints of car seat tray table Then drill small holes keeping in mind that upper two should outwards from center and lower two should inwards and then insert four small cylinders which will act as joints(axis of rotation) for top of table tray system inserti...