Circuit Design

This is the final design for the circuit we decided to make. When the ON/OFF switch (sw1) is set to the “ON” position this activates one of the micro switches (sw2) which in turn powers up the motor (m1). The motor then allows the arm to move out of the box and turn the switch (sw1) to the “OFF” position; this makes the motor go into reverse and retracts the arm back into the box. This also triggers another micro switch (sw3) which powers up the second motor (m2), this turns the shaft connected to the axel which allows the box to move 15cm before coming to a complete stop. The third micro switch (sw4) is the speed control switch; we put a resistor (r1) in with this to limit the speed that the box moved at. We added a diode (d1) to protect the motor from any charge that could possibly go back into the motor and destroy it.