CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Copyright © , Texas Instruments Incorporated. The basic building block of the circuit made around a very well known IC CD which is a hex inverter. This can be constructed, with the. the inverter CMOS digital IC datasheet is IC Hex Inverting Buffer IC, to design the Square wave oscillator generator circuit diagram.

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Cd404 the absence of light, LDR exhibits a resistance of the order of mega-ohms which decreases to few Light detector using LDR and astable mode of timer. I need to id a circuit contain a crystal oscillator square wave with The main use of this IC is to create a voltage multiplier circuit by simply adding resistor, capacitor, and diode with it.

Frank Donald is an Electronics and Communication Engineer who loves building stuff in his free time.

Magic Eye Circuit Using 4049 IC

Connect two in series to make a non-inverting buffer. What is Web Browser.

The output frequency is relatively constant, the rate of change in frequency of the power supply voltage is less. It is used for interfacing and to make simple clock pulse generators and oscillators. Leave a Reply Cancel reply.

Metronome using astable mode of timer IC.

Now the capacitor C1 has already started discharging through resistor R1 and the moment voltage across it decreases to a value that is treated as LOW state, the voltage at the point where four inverters are connected parallel becomes high thus switching off the lamp.


A loudspeaker or “speaker” is a transducer that converts electrical energy into acoustical energy. We will receive logic zero at output pin therefore LED and buzzer connected at output will not sound. The following two tabs change content below.

CD4049 – Hex Buffer, Inverter

When light is falling on LDR, its resistance gets very low and as a result input at pin 14 will be high. Resistor Resistor is a passive component used to control current in a circuit. Also you can drive two TTL loads with it. When an electric signal is applied to the input pin of speaker, it generates sound waves. SPI Module of Arduino. It also used for the conversion of high logic levels to low.

To understand the working you should know about the truth table of NOT gate which is: Abdelmoniem Mohamed Abdelaty 18 Dec Reply. Many electronics circuits and projects for learning in simple ways. In NOT gate, we will get output as logic high when logic zero is provided and we will get logic zero when logic1 is provided in input. The resistance decreases as the intensity of incident light increases, and vice versa.

Cupboard Lighting Circuit Circuit that use to illuminate your cupboard or other such dark places have significant application because main connection is not possible in those areas. Pls i will need a help in building my own inverter. This circuit uses a simple battery to power the light and also built with a auto shut-off. The circuit is built around a single hex inverting buffer IC CD which consists of six inverter gates in one package as shown in the below diagram.

And rest of the inverters in the CD IC are connected parallel together for lighting the lamp connected to the circuit. Circuit that use to illuminate your cupboard or other such dark places have significant application because main connection is not possible in those areas.


But as soon as shadow falls on LDR, its resistance will go high.

It can also be useful in making various projects like simple LED torch light, Automatic Street light, magic eye, cd40449 automatic guest detector at home door.

We can use this IC to make a square wave oscillator with less energy consumption.

The supply voltage to be used in the circuit have ranged from 3v to 12v of DC voltage. Skip to cd44049 content. Michael chiemeka 17 Sep Reply.

Magic eye can be used as automatic guest indicator in your home. Group all Htabs Electronics.

CD – Hex Buffer, Inverter

Touch switch using monostable mode of timer IC. In this circuit, we are utilizing only 1 gate of IC. This site uses Akismet to reduce spam.

What would be the average current in such a case? Also — an amplitude of 9 volt. The frequency determined by the resistor R1 and capacitor C1 can be obtained by the formula below:. Could you please be specific re the frequencies — I need a variable range of 1. The Lamp in the above circuit will be ON for about two minutes with the given components before getting auto shut off.

Interface GPS with Arduino.