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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Each NAND gate has input pins and 1 cd4011 pin. This establishes power to the chip. The quad NAND gate chip can be obtained very cheaply from a number of online retailers for just a few cents. The pinout of the is shown below, so that you can see how to connect it in the circuit. When the doors are open the gate inputs will be 1 and the output of the ic 0 which will turn the bulb off.

Practical Electronics/IC/ – Wikibooks, open books for an open world

First and foremost, we must give power to the NAND gate chip. The combined action of the these four gates form the working of this IC CD Each output can deliver output current of about 10mA at 12V but this range can reduce as cx4011 power supply voltage reduces.

When a pushbutton is pressed down, the pushbutton now makes contact across to ground. If the door was open or it is not properly shut, logic 0 is applied to the gate input.

There we can see that the NAND gate gives a high output to all the input states except the input states 1,1. This makes the bulb to glow indicating that the door is not properly shut. The positive terminal of the battery was connected to the pin 14 and negative terminal of the battery was connected to the pin7. Closing a door cc4011 input level 0 and output level 1 causing bulb to light.


A Beginner’s Guide To The Cmos

So the LED will turn on in this case. In our circuit, we will use both of these cases. However, it is a very popular chip and many electronics parts suppliers have lc.

Thus, we can test out all logic levels. The following two tabs change content below.

This makes the gate to change its output state from low to high. Frank Donald June 14, 1 Comment. When the door was closed push button switch, it apply logic 1 to the gate input. We can see the state of the output pins with the assigned inputs in the truth table iv above.

As a result the the bulb will not glow due to low output obtained from cv4011 output pins of the gates. The resistors also keep Vcc from directly shorting to ground when the pushbutton is pushed down. 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 output. Now let us see how this Integrated circuit works and how can we use it for our operations.

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

This way, we can see what combinations of inputs will make the NAND gate be off and what inputs make it turn on. Let me tell you 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. One place it can be obtained from is Tayda Electronics at the following link: Notify of all new follow-up comments Notify of new replies to all my comments.


For this circuit, we will connect pushbuttons to the 2 inputs of the NAND gate. 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. This IC was used since it withdraws only small power and also reduces the complexity of the circuit. These resistors function as pull-up resistors. Ce4011 in this circuit the input pins of the are connected to the supply voltage directly as shown in the diagram.

Thus, the pushbuttons, when left alone, unpressed, will normally have a logic value of 1.

Quote and Order boards in minutes on: Video games, blogging and programming are the things he loves most. Frank Donald is an Electronics and Communication Engineer who loves building stuff in his free time. And these situations comprise all the situations that can arise for a 2-input NAND gate. 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.

When we press down on a pushbutton, it changes to a logic level of LOW. Below is the breadboard schematic version of the above circuit so that you can see the exact wiring of the circuit to the chip.