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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The resistors also keep Vcc from directly shorting to cd4101 when the pushbutton is pushed down. Thus, the pushbuttons, when left alone, unpressed, will normally have a logic value of 1. Now let us see how this Integrated circuit works and how can we use it for our operations. However, it is a very popular chip jc many electronics parts suppliers have them. 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. Frank Donald June 14, 1 Comment. 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. These resistors function as pull-up resistors.
Each NAND gate has input pins and 1 output pin. For this circuit, we will connect pushbuttons to the 2 inputs of the NAND gate. The positive terminal of the battery was connected to the pin 14 and negative terminal of the battery was connected to the pin7. This makes the bulb to glow indicating that the door is not properly shut.
Here in this circuit the input pins of the are connected to the supply voltage directly as shown in the diagram. So the LED c4011 turn on in this case.
The pinout of the is shown below, so that you can see how to connect it in the circuit. Quote and Order boards in minutes on: However, in this circuit, we will just use one NAND gate, to make the circuit as simple as possible. When the doors are open the gate inputs will be 1 and the output of the ic 0 which will turn the bulb off. Each output can deliver output current of about 10mA at 12V but this range can reduce as the power supply voltage reduces. One place it can be obtained from is Tayda Electronics at the following link: This establishes power to the chip.
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. When a pushbutton is pressed down, the pushbutton now makes contact across to ground. The output pins of the IC are 3,4,10,11 and input pins are 1,2,5,6,9,8,12, As a result the the bulb will not glow due to low output obtained from the output pins of the gates.
First and foremost, we must give power to the NAND gate chip.
Practical Electronics/IC/ – Wikibooks, open books for an open world
Closing a door will input level 0 and output level 1 causing bulb to light. The quad NAND gate chip can be obtained very cheaply from a number of online retailers for just a few cents. 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. N4 was wired independently and there is no dependency on other gates.
When we press down on a pushbutton, it changes to a logic level of LOW. We can see the state of the output pins with the assigned inputs in the truth table given above. Latest posts by Frank Donald see all. In our circuit, we will use both of these cases. The following cx4011 tabs change content below.
This IC was used since it withdraws only small power and also reduces the complexity of the circuit. The combined action of the these four gates form the working of this IC CD Thus, we can test out all logic levels. This way, we can see what cd411 of inputs will make the NAND gate iv off and what inputs make it turn on.
This makes the gate to change its output state from low to high. If the door was open or it is not properly shut, logic 0 is applied to the gate input.
And these situations comprise all the situations that can arise for a 2-input NAND gate. Each NAND gate has two inputs and one output. Below is cv4011 breadboard schematic version of the above circuit so that you can see the exact wiring of the circuit to the chip. There we can see that the NAND gate gives a high output to all the input states except the input states 1,1.
When the door was closed push button switch, it apply logic 1 to the gate input.