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    10 x Triac Circuits Projects

    Browse through a total of 10 triac circuits.

    Universal Triac Control with Optocoupler This universal triac controller circuit with optocoupler solves the problem that triacs have when functioning at low temperatures (triac needs higher gate current) by adding a transistor at the output of the optocoupler circuit. The transistor amplifiers the trigger pulse coming from the optocoupler and the gate current is...
    Time Delay Switch with Triac This time delay switch circuit is useful to switch on an AC load such as lamps after the delay of three minutes. This protects the load from inrush current and transients at power on which may be detrimental to the device. The time delay switch is directly connected to the AC lines to derive power to the components. Resistor...
    Backyard Lamp Circuit This circuit lights the backyard of your home at 10 pm and stays on till morning. It helps to provide light in the back yard to avoid nocturnal animals and even prevents an attempt of theft. It is fully automatic and uses an LDR as light sensitive switch. The circuit has transformerless power supply and a timer based switching...
    Flashing Light with Triacs This flashing light circuit uses triacs to generate an intermittent light with variable frequency. Additional components are the D1 diode and semi adjustable potentiometer R2. The trigger capacitor C1 is increased from 0.1 µF to 220 µF so that the triacs can be ordered for several successive periods. C1′s...
    Optimizing the Triacs Modern power control systems utilize electronic devices like Thyristors for power switching, phase control, chopper etc. These devices also find applications in inverter design, brilliance control in lamps, speed control of motors etc. Triacs are the most common semiconductor devices used in power control and switching...
    AC Motor Speed Controller Circuit This triac-based 220V AC motor speed controller circuit is designed for controlling the speed of small household motors like drill machines. The speed of the motor can be controlled by changing the setting of P1. The setting of P1 determines the phase of the trigger pulse that fires the triac. The circuit incorporates a...
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