H-bridge circuit using NPN transistors


Posted on Feb 5, 2014

The transistors Q1, Q2, Q3 and Q4 form the bridge circuit. Generally these are power transistors capable of handling high current. Q5 and Q6 drive the bridge. when the `A` is made high and `B` low, transistor Q5 is on and it makes Q1 and Q4 on. The current flows from vcc to ground through Q1, motor and Q4. hence the motor rotates in forward direction.


 H-bridge circuit using NPN transistors
Click here to download the full size of the above Circuit.

When `A` is made low and `B` high the transistor Q6 is on and it makes the Q3 and Q2 on. The current flow from vcc to ground through Q3, motor and Q2. hence the motor rotates in reverse direction.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    LED digital Voltmeter
    HF GENERATOR using a 68HCx11
    200 LEDs Christmas Lights circuit
    Color-tv-crosshatch-generator
    Ultrasonic Pest Repeller Circuit
    70 W switching power supply
    Smart Sensor Glove
    time pulse
    TPA2011D1 3.2W Mono Filter-Free Class-D Audio Power Amplifier With Auto-Recovering Short-Circuit Protection
    8051 Development Board
    FOUR STATION TWO WAYl
    T3SE type 3 SE
    Avoid contact thermometer circuit
    Using an inverter transistor monostable circuit diagram
    DC relay delayed release circuit 2 b



    Top