XNOR or EX-NOR gate is a digital logic gate, designed for arithmetic and logical operations. Here we are going to use 74LS86 chip for demonstration, this chip has 4 EX-OR gates in it.
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LM386 Audio Amplifier Circuit
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LM386 is a low voltage audio amplifier and frequently used in battery powered music devices like radios, guitars, toys etc. The gain range is 20 to 200, gain is internally set to 20 (without using external component) but can be increased to 200 by using resistor and capacitor between PIN 1 and 8, or just with a capacitor.
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Digital Dice Circuit
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Dice is used to play many games like snake ladder, Ludo etc. Generally dice is made up of wooden or plastic, which gets deformed with time and become biased. A Digital dice is a good alternative of old fashioned dice, it can’t be biased or deformed.
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H-Bridge Circuit
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H-bridge is the circuit in which voltage can be applied across the load, in either of the direction. These circuits are frequently used in robotics, especially for the DC motor. Voltage can be applied in either direction to rotate the DC motor forward or backward
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Dark and Light Detector Circuit
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In this project, we are going to make a day and night indicator (or dark and light indicator) which will indicate if there is a dark or light in the surroundings. Some applications of this circuit, are street light controlling, home/office light controlling, day and night indicators, etc.
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NAND Gate Circuit
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This gate is mainly used in applications where there is a need for mathematical calculations. So calculators, computers and many digital applications use this gate.
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Arduino automatic water system to wet your plant
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This project can be useful when we are at home and want to take care of our garden; In fact, from their iPhone / smartphone, you can drive a small pump that can dampen our flowers / plants. Let 'need:
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SIMPLE ARDUINO ULTRASONIC SENSOR DOOR ALARM
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Today I decided i wanted to build an alarm for my room, when I searched online all door alarms used the PIR sensor, unfortunately mine was faulty.
and that"s when I decided to build my own alarm using an ultrasonic sensor (HC-SR04),and I found out it was really simple.
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555 Alarm/Timer Circuit
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In this instructable i will explain how to build a simple 555 circuit that will blink a led and sound a buzzer, this has many application for example you can connect an LDR between the power source and the circuit and then put it in your closet where it is dark and when someone opens the closet the alarm will sound
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IR Transmitter and Receiver Circuit Diagram
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IR Transmitter and receiver are used to control any device wirelessly, means remotely. TV remote and TV are the best example of IR transmitter and receiver. TV generally consist TSOP1738 as the IR receiver, which senses modulated IR pulses and convert them into electrical signal.
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