Schematic of car backseat tray
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....