H - BRIDGE CONCEPT :
AN H- BRIDGE CONCEPT IS SIMPLE CIRCUIT THAT LETS YOU CONTROL A DC MOTOR
TO GO BACKWARD OR FORWARD . IT IS NORMALLY USED WITH MICROCONTROLLER SUCH AS ARDUINO TO CONTROL TO CONTROL MOTORS.
A DC MOTOR SPINS EITHER BACKWARDS OR FORWARD DEPENDING UPON HOW YOU CONNECT PLUS AND MINUS .IF YOU CLOSE SWITCH 1 AND 4 YOU HAVE PLUS CONNECTED TO THE LEFT SIDE OF THE MOTOR AND MINUS TO THE OTHER SIDE AND MOTOR WILL START SPINNING IN ONE DIRECTION. IF YOU INSTEAD CLOSE SWITCH 2 AND 3,YOU PLUS CONNECTED TO THE RIGHT SIDE AND MIUS CONNECTED TO LEFT SIDE AND MOTORS STARTS SPINS IN OPPOSITE DIRECTION.