Sep 21, #Working and pin configuration of the #NAND #IC CD A door opening indicator circuit using IC gate IC and working of NAND gates. CD TRUTH TABLE. The CD is the most used CMOS chip. The CD IC has 4 gates and these can be wired to create a BUFFER, Inverter (NOT) . ooÕoo This article starts with a detailed look at the operation of the Cmos It then considers the practical use of the IC in the small alarm circuit on the .

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Below is the breadboard schematic version of the above circuit so that you can see the exact wiring of the circuit to the chip. Let me tell jc why, usage of large range of the NAND gates occupies more space and also it withdraws more power arising problems in power management to a circuit.

However, it is a very popular chip and many cd40011 parts suppliers have them. The pinout of the is shown xd4011, so that you can see how to connect it in the circuit. There we can see that the NAND gate gives a high output to all the input states except the input states 1,1.

The resistors also keep Vcc from directly shorting to ground when the pushbutton is pushed down.

A Beginner’s Guide To The Cmos

The following cdd4011 tabs change content below. Notify of all new follow-up comments Notify of new replies to all my comments. This way, we can see what combinations of inputs will make the NAND gate be off and what inputs make it turn on. The output pins of the IC are 3,4,10,11 and input pins are 1,2,5,6,9,8,12, Now let kc see how this Integrated circuit works and how can we use it for our operations. N4 was wired independently and there is no dependency on other gates. The corresponding input pin will now be grounded and its logic level will change to a logic LOW now that it makes contact down to ground.


How to Build a NAND Gate Logic Circuit Using a 4011 Chip

This establishes power to the chip. Thus, we can test out all logic levels. When a pushbutton is pressed down, the pushbutton now makes contact across to ground. In our circuit, we will use both of these cases. When we press down on a pushbutton, it changes to a logic level of LOW. One place it can be obtained from is Tayda Electronics at the following link: And these situations comprise all the situations that can arise for a 2-input NAND gate.

For this circuit, we will connect pushbuttons to the 2 inputs of the NAND gate.

Each Xd4011 gate has input pins and 1 output pin. Closing a door will input level 0 and output level 1 causing bulb to light. Video games, blogging and programming are the things he loves most.

These resistors function as pull-up resistors. This makes the bulb to glow indicating that the door is not properly shut.

Quote and Order boards in minutes on: The combined action of the these four gates form the working of this IC CD The quad NAND gate chip can be obtained very cheaply from a number of online retailers for just a few cents. Here in this circuit the input pins of the are connected to the supply voltage directly as shown in the diagram. Each output can deliver output current of about 10mA at 12V but this range can reduce as the power supply voltage reduces.

So the LED will turn on in this case. As a result the the bulb will not glow due to low output obtained from the output pins of the gates. If the door was open or it is not properly shut, logic 0 is applied to the gate input.


We can see fd4011 state of the output pins with the assigned inputs in the truth table given above. Thus, the pushbuttons, when left alone, unpressed, dd4011 normally have a logic value of 1. This circuit was wired as a door open indicator which indicates the opening of door using the bulb which was connected to the output pins of the gates. Frank Donald is an Electronics and Communication Engineer who loves building stuff in his free time. When the doors are open the gate inputs will be 1 and the output of the ic 0 which dc4011 turn the bulb off.

First and foremost, we must give power to the NAND gate chip. The positive terminal of the battery was connected to the pin 14 and negative terminal of the battery was connected to the pin7. This circuit is as basic as it gets for a NAND gate circuit and it demonstrates all the possible input values that a NAND gate chip can receive and output. Each NAND gate has two inputs and one cd4101.

However, in this circuit, we will just use one NAND gate, to make the circuit as simple as possible.

Frank Donald June 14, 1 Comment. Latest posts by Frank Donald see all. When the door was closed push button switch, it apply logic 1 to the gate input. This makes the gate to change its output state from low to high. This IC was used since it withdraws cd0411 small power and also reduces the complexity of the circuit. When either one or both of the pushbuttons are pressed, the NAND gate will output a logic HIGH or 1and the load connected to output will be powered on.