Drive relay with AVR microcontroller

Posted on Feb 5, 2014

To drive relay you need more than 20mA the current can one pin drive. This is why you cannot connect relay directly to microcontrollers pin. To drive relay you need to connect simple amplifier made of one transistor. This circuit is more general as instead relay you can connect any other load like lamps, DC motors if you need to control more t

Drive relay with AVR microcontroller
Click here to download the full size of the above Circuit.

han one relay, you might consider using ICs like ULN2003 or ULN2803. These ICs haveDarlingtontransistors inside and can drive up to 500mA each. We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Schmitt trigger with LM741 op-amp
    FM reciever with classic TDA7000
    CMOS Toggle Flip Flop Switch
    Measuring phase difference
    Laser Power Supply Circuit
    Build a fully featured Arduino Thermostat
    Wireless Headphone Transmitter Receiver Circuit
    dvd burner laser pointer proper way 18
    DIY Li ion battery charger w adjustable shut off current
    auto power off schematics
    Simple Headlight Reminders
    scr tester
    Intelligent ultrasonic ranging ASIC SB5227 peripheral circuit design
    Alternately flashing lights chain multiple sets of high-power circuit 2